20085

PETRONAS TECHNICAL STANDARDS DESIGN AND ENGINEERING PRACTICE

TECHNICAL SPECIFICATION

THE DESIGN AND INSTALLATION OF VENTILATING & AIR CONDITIONING SYSTEMS OFFSHORE

PTS 20.085 JANUARY 1988

PREFACE

PETRONAS Technical Standards (PTS) publications reflect the views, at the time of publication, of PETRONAS OPUs/Divisions. They are based on the experience acquired during the involvement with the design, construction, operation and maintenance of processing units and facilities. Where appropriate they are based on, or reference is made to, national and international standards and codes of practice. The objective is to set the recommended standard for good technical practice to be applied by PETRONAS' OPUs in oil and gas production facilities, refineries, gas processing plants, chemical plants, marketing facilities or any other such facility, and thereby to achieve maximum technical and economic benefit from standardisation. The information set forth in these publications is provided to users for their consideration and decision to implement. This is of particular importance where PTS may not cover every requirement or diversity of condition at each locality. The system of PTS is expected to be sufficiently flexible to allow individual operating units to adapt the information set forth in PTS to their own environment and requirements. When Contractors or Manufacturers/Suppliers use PTS they shall be solely responsible for the quality of work and the attainment of the required design and engineering standards. In particular, for those requirements not specifically covered, the Principal will expect them to follow those design and engineering practices which will achieve the same level of integrity as reflected in the PTS. If in doubt, the Contractor or Manufacturer/Supplier shall, without detracting from his own responsibility, consult the Principal or its technical advisor. The right to use PTS rests with three categories of users : 1) 2) 3)

PETRONAS and its affiliates. Other parties who are authorised to use PTS subject to appropriate contractual arrangements. Contractors/subcontractors and Manufacturers/Suppliers under a contract with users referred to under 1) and 2) which requires that tenders for projects, materials supplied or - generally - work performed on behalf of the said users comply with the relevant standards.

Subject to any particular terms and conditions as may be set forth in specific agreements with users, PETRONAS disclaims any liability of whatsoever nature for any damage (including injury or death) suffered by any company or person whomsoever as a result of or in connection with the use, application or implementation of any PTS, combination of PTS or any part thereof. The benefit of this disclaimer shall inure in all respects to PETRONAS and/or any company affiliated to PETRONAS that may issue PTS or require the use of PTS. Without prejudice to any specific terms in respect of confidentiality under relevant contractual arrangements, PTS shall not, without the prior written consent of PETRONAS, be disclosed by users to any company or person whomsoever and the PTS shall be used exclusively for the purpose they have been provided to the user. They shall be returned after use, including any copies which shall only be made by users with the express prior written consent of PETRONAS. The copyright of PTS vests in PETRONAS. Users shall arrange for PTS to be held in safe custody and PETRONAS may at any time require information satisfactory to PETRONAS in order to ascertain how users implement this requirement.

CONTENTS 1. SCOPE 2. DESIGN AND DOCUMENTATION 3. REFERENCE DOCUMENTATION 4. ENVIRONMENTAL CONDITIONS 5. UTILITIES AVAILABLE 6. EQUIPMENT 7. INSTRUMENTATION AND CONTROLS 8. HVAC DUCTWORK 9. DUCTWORK INSULATION 10. REFRIGERANT PIPING 11. TESTING AND COMMISSIONING Attachment I - HVAC Testing and Commissioning Balancing Sheets Attachment II - HVAC Technical Equipment Specifications Attachment III - HVAC Preferred Manufacturers REVISION REGISTER REVISION NUMBER

DATE

DETAIL OF REVISION

1 2

9/83 1/88

Entire PTS

1.

SCOPE The scope of this specification is to establish the minimum standards materials and performance, features for the design, fabrication, installation, operation and testing of systems and equipment to ventilate, cool, dehumidify and pressurize the areas specified on offshore installations.

2.

DESIGN AND DOCUMENTATION 2.1

This section describes the design and documentation to be adopted for HVAC offshore projects.

2.2

Calculations 2.2.1

2.3

2.4

HVAC Control Scheme, PFD's & P & ID's 2.3.1

The HVAC systems shall be designed with basic equipment loads and flow rates produced in HVAC Process Flow Diagrams.

2.3.2

The HVAC piping and instrumentation diagrams (P & ID) shall supplement the HVAC control concept and requirements. These P & ID's shall indicate areas of responsibility and input from various engineering disciplines.

2.3.3

The HVAC electrical control schematics and wiring diagram along with HVAC logic diagrams shall be designed in accordance with PTS 20.083. Standard Engineering Specification for Design, Installation and Testing of Electrical Systems (Onshore and Offshore).

Flow Sheets 2.4.1

2.5

HVAC flow sheets shall be produced to indicate the relative position of plant and the areas served, duct or pipe size, air or water quantity, velocity and resistance to flow.

HVAC Layout Drawings - Accommodation & Process Modules 2.5.1

3.

The calculations shall be in accordance with the general principles as laid down in the Chartered Institute of Building Service Engineers Guides A, B and C and/or ASHRAE hand books.

The 'layouts and sections/'elevations shall be prepared to position plant ducting and pipework services. The preparation of these drawings shall be fully coordinated with other services to ensure a clash-free installation. Multiservices layout drawings shall be required to ensure this coordination has taken place.

REFERENCE DOCUMENTATION 3.1

The following reference documents, codes and standards shall be used when designing HVAC systems and specifying HVAC equipment. Unless a written approval is obtained from the Senior Electrical Engineer in PETRONAS, the contractor shall not use standards/codes other than mentioned below.

a)

Department of Energy, Offshore Installations - Guidance on Design and Construction.

b)

IEE Regulations for the Electrical and Electronic Equipment of Ships.

c)

Institute of Petroleum, Model Code of Safe Practice.

d)

DET Norske Veritas Technical Notes.

e)

Safety of Life at Sea International Convention (SOLAS).

f)

British Standards. For detailed information see item 3.2.6.

g)

HVAC Standards (Refer 3.2.7).

h)

PETRONAS Technical Standards PTS - 31.29.00.31 - Noise Limitations for Equipment. PTS - 33.64.10.10 - Electrical Engineering Guidelines. PTS - 33.66.05.31 - Electric Motors Three - Phase, Cage Induction Type.

i)

3.2

International Electrotechnical Commission - IEC.For detailed information see item 3.2.6

The design of the HVAC systems and specifications for HVAC equipment shall pay particular attention to the following aspects of the regulations and codes listed in Item 3.1 above. All publications, specifications standards and design codes mentioned in this specification shall be the latest issue and include all up to date revisions.

3.2.1 Construction

Department of Energy, Offshore Installations - Guidance on Design and Construction Section 5.6, 5.8, 5.9, and 8.6.

3.2.2

I.E.E. Recommendations for the Electrical and Electronic Equipment of Mobile and Fixed Offshore Installations, Section 14.8 Ventilation, Batteries.

3.2.3

Institute of Petroleum, Model Code of Safe Practice, Part 1 Section 3 and 5, Part 8 Section 2.11.

3.2.4

DET NORSKE VERITAS TECHNICAL NOTES An example of DNV Technical notes are listed below: TNB 203 Stationary Accumulator Batteries.

3.2.5

Safety of Life at Sea (SOLAS) Sections on ventilation trunking passing through bulkheads - and class of bulkheads.

3.2.6

For reference the following standards shall be used. BS 476

Part 7 - Surface Spread of Flame Tests for Materials

BS 729

Hot Dip Galvanised Coatings on Iron and Steel Articles

BS 848

Part 1 - Methods of Testing Performance

BS 1474

Wrought Aluminium and Aluminium Alloys for General Engineering Purposes - Rivet, Bolt and Screw Stock

BS 1706

Electroplated Coatings of Cadmium and Zinc on Iron and Steel

BS 2831

Methods of Test for Air Filters - used in Air conditioning and General Ventilation

BS 3790

Specification for Endless Wedge Belt Drives and Endless V-Belt Drives

BS 4278

Eye Bolts for Lifting Purposes

BS 4683

Part 4 - Type of Protection - 'E'

BS 4718

Methods of Test for Silencers for Air Distribution Systems

BS 4800

Specification for Paint Colours for Building Purposes

BS 4856

Methods for Testing & Rating Fan Coil Units, Unit Heaters & Unit Coolers

BS 5141

Air Heating & Cooling Coils

BS 5304

Code of Practice for Safeguarding of Machinery

BS 5422

Specification for the use of Thermal Insulating Materials

BS 5493

Code of Practice for Protective Coating of Iron and Steel Structures Against Corrosion

IEC Standards

3.2.7

IEC

144 Degrees of Protection or Enclosures for Low-Voltage Switchgear and Controlgear

IEC

331 Fire-Resisting Characteristics of Electric Cables

IEC

332 Part 3 Test on Bunched Wires or Cables

HVAC Standards a) Specification for sheet metal ductwork, low, medium and high velocity/pressure air systems DW/142, Heating and Ventilating Contractors' Association.

3.2.8

b)

Guide of the Chartered Institute of Building Services Books A, B and C.

c)

C.I.B.S. Commissioning Codes Series A, B, C, R and W.

d)

Offshore Technology Conference Note OTC 2873.

e)

A.S.H.R.A.E. Handbooks.

PETRONAS Technical Standards

PTS 20.078 The Design & Specification of Instruments PTS 20.081 The Design and Fabrication of Pipework PTS 30.48.00.31-P Protective Coatings and Lining PTS 20.083 Standard Engineering Specification for Design, Installation and Testing of Electrical Systems (Onshore & Offshore)

3.2.9

Statutory Regulations The work and all plant, equipment and materials forming part of this specification are to comply in all respects with any relevant Malaysian Statutory Regulations, By-law and Orders currently in force.

4.

ENVIRONMENTAL CONDITIONS 4.1

The external environmental design conditions which are to be used in designing the ventilating and air conditioning systems will be set out in the environmental data specification for the area under design.

4.2

The influence of the wind directions and forces on the operation of the air conditioning, ventilation and pressurisation systems shall be considered when selecting inlet/outlet louvre positions, fan selection and sizing.

4.3

In order to reduce the concentration of salt particles in the air to an acceptable level, filter coalescers shall be provided at fresh air inlets. These filters shall be capable of reducing the concentration of salt particles in the air to 0.05 ppm (by weight) with a minimum operating efficiency of 99% at 6 micron.

4.4

The internal environmental design conditions which are to be used in the design of the ventilation and air conditioning systems shall be as follows:CONTROL TOLERANCES 22°

Cdb

55%

RH

Kitchen Areas

26°

Cdb

55%

RH

Control/Computer areas

22°

Cdb

50%

RH*

Switchrooms

25°

Cdb

50%

RH

Cabins and recreation areas

Battery Rooms

+2° C -2° C +2° C -2° C +1° C -1° C +2° C -2° C

+5% -5% +5% -5% +5% -5% +5% -5%

RH RH RH RH RH RH RH RH

+5° C -5° C Refer to Generator Manufacturer's Requirements

+5% -5%

RH RH

Refer to Manufacturers Requirements 25°

Workshops Generator enclosures

Cdb

55%

RH

*Any changes should not exceed 3 °C/hour. The filtration requirements for control/computer areas shall be 98% at 5 microns. This is a theoretical measurement of filter efficiency under laboratory conditionings using Test Dust No. 2 to BS 2831 (a dust containing particles of nominal diameter 5 microns). The filter will extract 98% by weight of the test dust sample.

4.5

The HVAC Systems shall be designed to satisfy the following principles for ventilation air quantities and pressurisation, unless specified otherwise. 4.5.1

A minimum fresh air supply of 8 lt./sec. per occupant for manned areas.

4.5.2

A minimum air change rate of 4 lt./hour for all safe area.

4.5.3

Sufficient air quantity to remove heat gains from equipment, lights, solar, personnel, and to maintain each space within the internal design conditions as detailed in Section 4.4.

4.5.4

In order to satisfy the requirements of the certification authority, enclosures where required in hazardous area, are to be adequately ventilated at an air flow rate of at least 12 air changes per hour and pressurised. This would ensure that the enclosure is not at a lower pressure than the hazardous area.

4.5.5

The pressurization systems shall be designed to maintain a minimum pressure differential, with a leakage allowance through all closed doors of 50 pa positive pressure with respect to the hazardous area. All doors, windows, duct/piping sleeves and other penetrations into and out of the pressurised rooms are to be air-tight, such that enclosure pressurization is not lost at these penetrations. The design of seals shall take into account the room pressure.

5.

UTILITIES AVAILABLE 5.1

Electrical Power 415/240 Volt AC, 3 phase, 4 wire, 50Hz 24 Volt DC

5.2

Instrument Air Clean dry compressed air at 850 kPa shall be provided for pneumatic controls/operations, for details on instrument air condition refer to line schedule data sheets and P & IDs.

5.3

Sea Water Service sea water shall be provided for use in refrigeration unit water cooled condensers. For details of sea water condition refer to line schedule data sheets and P & IDS

6.

EQUIPMENT 6.1

General Design Parameters 6.1.1

Foremost amongst the factors influencing the design of the air conditioning, ventilation and pressurization systems for offshore platforms shall be the need for reliability and safety, particularly of the equipment and controls, considering the remoteness of the location and the consequent impact on maintenance and replacement. The design and operation of the air conditioning and ventilation systems shall be fully integrated with the electrical, instrument, fire detection and fire protection systems to provide a safe environment offshore and to meet all codes and standards specified in section 3.0 of this specification. Consideration to use standards other than chose specified herein shall be requested in writing.

6.2

6.1.2

The air conditioning and ventilating equipment shall be suitable for operation in a marine offshore environment and be suitable for use in the area classification as detailed by electrical specification/area classification drawings.

6.1.3

The technical details of HVAC equipment are specified in Attachment 2.

For the selection of electrical resp. instrument equipment for Hazardous and Nonhazardous areas refer to PTS 20.083 and PTS 20.078. Electrical and instrument equipment/material operating in a hazardous environment shall be certified appropriate to the area concerned. For the necessary requirements of the certificates/declaration documents refer to PTS 33.64.10.10

7.

INSTRUMENTATION AND CONTROLS 7.1 The air conditioning, ventilation and pressurization systems shall be monitored by auto automatic controls, the control system shall be pneumatically and/or electrically diagramoperated. The control system shall comprise of locally mounted field instrument which shall beshall be connected to panel instruments contained within the main HVAC control cabinet.cabinet. The design and specification of instrumentation and systems shall comply with PTS 20.078 ("The Design & Specification of Instruments"), and conform to the PETRONAS Technical Standards Practices. Practic

8.

7.2

The automatic control system shall be designed such that on failure of any drive automatic changeover to standby equipment is made.

7.3

The main HVAC control panel shall have a mimic diagram detailing all equipment and areas served by the HVAC system.

7.4

The design of the electrical system shall comply with PTS 20.083 - Standard Engineering Specification for Design, Installation and Testing of Electrical Systems (Onshore and Offshore).

HVAC DUCTWORK 8.1

General Requirements 8.1.1

8.2

The HVAC ductwork systems for all offshore projects shall be fabricated and installed using the practices laid down by the Heating and Ventilating Contractors' Association specification for sheet metal ductwork DW/142 (low, medium and high pressure/velocity air systems).

The specification DW/142 is for standard HVAC projects. Listed below is the revisions that are to be incorporated when using DW/142 for offshore installation. 8.2.1 All ductwork systems shall be bonded to eliminate fire or explosion initiated by staticby static electricity in a hazardous location. The ductwork shall be bonded at flange joflange joints by earthing straps/cables. For earth bonding requirements see PTS 20.PTS 20.083 Rev. 3 as well as IEE Regulations for offshore installations. 8.2.2

All joints and seams shall be made air-tight by use of sealant. It must set after 24 hours, remaining slightly plastic to ensure air tightness. The sealant shall be resistant to alkalis, acids, petrol, oil, leather degradation, fresh and salt water.

8.2.3

Where dissimilar metals are joined (e.g. equipment connections) suitable insulating gaskets, sleeves and washers shall be provided in order to prevent galvanic corrosion. The flange gasket material shall be a non-combustible sealing strip.

8.2.4

All HVAC ductwork supports shall be provided with TICO pad inserts and/or insulating blocks of glass reinforced plastic or machinery cork where a vapour barrier is to be maintained.

8.2.5

Duct test holes shall be provided on the discharge duct of each fan, and each major branch duct handling over 10% of any total air to enable pitot tube readings to be taken. Test hole of size 15mm ø. and fitted with an effective seal shall be provided on the side of the ducts or other convenient positions. Test hole shall be located at a point of minimum turbulence and the number and spacing shall be in accordance with the CIBS recommended practice.

8.2.6

All HVAC ductwork systems with an induct velocity of 10 m/s or greater shall be leak tested prior to the application of thermal insulation and before terminal units (if any) are fitted. The air leakage test shall be based on the measurement of air leakage at constant pressure. The maximum leakage rates specified in the Appendix A of the HVCA specification DW/142 shall apply. For full details of leak test procedure and leak test sheets to be used on all offshore projects refer to Appendix B of the HVCA Specification DW/142.

8.2.7

8.3

Fire Rated (A60) HVAC Ductwork 8.3.1

8.4

All HVAC ductwork installed on offshore platforms shall be made of 4 mm minimum thickness carbon steel with flanged joints. The ductwork and fittings shall be painted in accordance with PTS 30.48.00.31-P "Protective Coatings and Lining". The ductwork fabrication and/or installation drawings shall detail all special requirements for the ductwork i.e. type and size of supports, welding, methods and type of welds to be used.

The HVAC ducting to meet A60 rating shall be constructed of 4 mm minimum thickness carbon steel plate suitably insulated to meet the requirements of the certification authority i.e. Lloyds of London or Det-Norske Veritas. Approval of materials and methods of insulation/installation shall be obtained before this ductwork is employed in the design of offshore HVAC ductwork systems.

Induct access doors shall be provided at the following equipment and be of the quick release type with gaskets of non-combustible, non smoking material. Location of Access Doors: Volume Control Dampers Pressure Control Dampers Heater and Cooler Batteries Induct Filters Induct Control Devices (Temperature & Humidity Detecting Equipment) On each side on in line fans. The average size of ductwork access door shall be 375 mm x 300 mm subject to duct size. Access doors for carbon steel ductwork shall be of the bolted type with welded handles.

8.5

Induct balancing dampers shall be provided on all branch ducts and shall be of the single or opposed blade action type with a locking device located on the outside of the duct and giving clear indication of damper position (open-closed).

8.6

Flexible connections shall be of the fire resistant type and shall be provided on the suction and discharge connections to each fan as and when required The flexible connections shall provide 80 mm clearance between fan or equipment connections to ductwork. The method of connection shall permit renewal of the flexible connection without dismantling the ductwork. The flexible connectors shall conform to the requirements of BS 476 Part 7 Class 1 Spread of Flame Test.

9.

DUCTWORK INSULATION 9.1

General Requirements 9.1.1

The insulating materials shall be applied in accordance with the manufacturer's recommendations.

9.1.2

The insulation thickness for the ductwork systems shall be calculated for each application. Listed below is a guide for minimal accepted thicknesses. Type

Thermal Acoustic

Fire Rated

Service

Thickness

Cold Supply Ducts

50 mm vapour barrier

Return Ducts

25 mm vapour barrier

Cold Supply Ducts

25 mm

Return Ducts

25 mm

Extract Ducts

25 mm

Supply Ducts

75 mm Fire Batts 110kg/m3

Extract Ducts

75 mm Fire Batts 110kg/m3

Return Ducts

75 mm Fire Batts 110kg/ m3

Cold Supply Ducts

75 mm Fire Batts 110kg/ m3

9.2.

Insulation Material 9.2.1

Insulating material for ductwork shall conform to BS 5422, as manufactured by Rocksil of Cape Insulation Ltd or similar.

9.2.2 The insulating material shall have the following minimum acceptable properproperties:Thermal Insulation

Density 32 kg/m3 K Value 0.35 W/m °C at 10 °C

Acoustic Insulation

Density 32kg/m3

Fire Rated Insulation

Density 110 kg/m3 K Value 0.42 W/m °C at 50 °C

Thermal insulation shall be faced with glass reinforced aluminium foil/kraft paper laminate to give a suitable vapour barrier. The insulation water vapour barrier shall have a permanent not exceeding 0.013 metric perms. The vapour barrier shall not be pierced or damaged by supports. Points of discontinuity and the ends of sections of the vapour barrier shall be returned and sealed to the ductwork to prevent moisture from entering the insulation at the edges. 9.3

10.

Insulation Finishes 9.3.1

The finish for all exposed internal ductwork systems shall be a stainless steel jacketing/cladding. The cladding thickness shall be 22 swg (approximately 0.6 mm) with a factory applied prebonded moisture barrier. The fasteners for the cladding shall be self tapping stainless steel screws.

9.3.2

The finish for all thermal or fire rated ductwork external to enclosures shall be stainless steel jacketing as per 9.3.1.

9.3.3

The finish for equipment with external acoustic insulation shall be as per 9.3.1 unless forming of jacketing promoting vibration then an asbestos-free, fast-drying insulating cement which when trowelled shall produce a smooth hand surface when dry. The finished surfaces shall be painted in accordance with Company paint specification.

REFRIGERANT PIPING 10.1 The supplier of a split refrigeration/air conditioning system shall install the complete interconnecting liquid and suction refrigeration pipework. The refrigerant pipework shall be of copper to B.S. 2871. Included within the copper refrigerant pipework shall be the following:a)

Isolation valves

b)

Filters

c)

Driers/filter driers

d)

Sight glasses

e)

Thermal expansion valves

f)

Solenoids

g)

Charge points

h)

System gauges

i)

Liquid indicators

j)

Oil separators

k)

Mufflers

l)

Accumulators

10.2 The supplier shall test and charge the complete refrigeration system on the completion of the installation service. The charging, start-up and operation of the system shall be in accordance with the CIBS Commissioning Codes - Series R Refrigerating Systems.

10.3 Drain Piping Condensate drain piping shall be installed with suitable pipeline traps using type L copper pipe and wrought copper fittings. 10.4 Piping Insulation 10.4.1 Refrigerant and condensate drain piping shall be insulated with noncorrosivecorrosive, non-combustible and smokeless pipe insulation meeting the spread spread of flame test BS 476 Part 7 Class 1 with a factory applied vapour barrier ty barrier type stainless steel cladding with screws and metal tape fasteners. The insul The insulation shall have the following properties:Density K value @ 100 °C Temperature limits

3

80-110 Kg/m No to exceed 0.05 W/m ° C 600 ° C

10.4.2 The refrigerant suction lines shall be insulated to prevent condensation and heat gai heat again. Liquid lines do not normally require insulation unless they pass through through an area of higher temperature. Hot gas lines should be insulated if the heat the heat dissipated is objectionable or where there is need for personnel burn prot burn protection . 10.4.3 Condensate drain piping shall be insulated with 10 mm thick insulation. The nsulatin insulating material shall meet the spread of flame test BS 476 Part 7 Class 1 10.4.4 Insulation shall be slipped to the extent possible on the pipe prior to erection with with butt joints sealed with adhesive. Where slip-on technique is not possible, insulation shall be slit and applied to the pipe with longtudinal seams and butt joints sealed with adhesive. The insulation adhesive must be non combustible smokeless, rot and vermin proof and meet the spread of flame test BS 476 Part 7 Class 1. 10.4.5 Insulation for pipe fittings shall be fabricated and installed according to the manufacturer,s recommended procedures. Sweated fittings shall be insulated with mitre cut pieces of insulation the same size as on adjacent piping.

10.4.6 Pipe insulation shall be protected with 28 gauge stainless steel sheet metal shield at all outside pipe locations. 10.5 Pipe Support 10.5.1 Generally, hangers and supports shall be of steel of adequate dimension and designed to allow for expansion and construction. All hangers and supports shall be primed and finish coated in accordance with PTS 30.48.00.31-P "Protective Coatings and Lining". 10.5.2 In all cases, cradles for pipes of 150 mm diameter and larger, and clamps for pipes below 150 mm diameter shall support the pipe independent of any lagging. Special care shall be taken with vapour seals and laggings to ensure they are continuous at points of support. Clamps shall be lined internally with 15 mm thickness neoprene strips. These neoprene strips shall meet the spread of flame test BS 476 Part 7 Class 1.

10.5.3 Hangers or support spacing shall not exceed the following:Nominal Pipe Size (mm)

Maximum Span (mm)

Minimum Rod Diameter (mm)

Up to and including 50 mm bore 65 to 90 mm bore 100 and 125 mm bore 150 mm bore 200 to 300 mm bore Above 300 mm

1800 3600 4200 4800 3000 3000

10 15 16 20 20 25

Pipe hangers shall be placed not more than 450 mm from each change of direction where possible. 11.

TESTING AND COMMISSIONING 11.1 General Requirements 11.1.1 This section defines the testing and commissioning necessary to prove the operation and efficiency of offshore platform air conditioning, ventilation and pressurization systems. All testing shall be witnessed by and approved by the Company. 11.1.2 The commissioning engineers shall provide themselves with all necessary test instruments and apparatus to complete the commissioning. 11.1.3 The commissioning engineers shall make a survey of the systems onshore and if necessary offshore and determine a realistic estimate of the time and manpower requirements to complete the commissioning function. This review shall include time and manpower requirements for installation crafts and any specialist services that may be requested by the. Company, to complete punch list items and attend to remedial work e.g. make good insulation, close test points and generally leave the installation in a complete condition. 11.1.4 The commissioning engineers shall make a limited survey of the systems when it is near to completion. Prepare a schedule of test point requirements, access requirements, and any special temporary hook ups required during commissioning. In conjunction with the Company's commissioning engineer or his authorised representative, prepare a punch list of installation work required to complete the system and errors and omissions as seen. 11.1.5 The commissioning engineers shall produce reports on a regular basis detailing all work and actions taken in placing the HVAC system into operation. The final commissioning report shall contain all approved test sheets and a report on each systems performance. When a system or part of a system is not performing as per the design requirement, recommendations are to be made on methods of meeting the design i.e. plant increase in duty, distribution, equipment, etc. The commissioning engineers shall if required make themselves available to carry out any modification/remedial work that is deemed necessary to the HVAC systems to make them fully operational to the satisfaction of the Company. For details of commissioning sheet to be completed refer to Attachment 1 of this document 11.2 Commissioning Records 11.2.1 The testing and commissioning records shall be witnessed by the Company's Authorised Representative (C.A.R.). Any part of the checks made by the CAR not meeting design/tested settings shall mean that the system is "out of balance" and will be rebalanced and submitted for CAR approval at a later prearranged date.

11.3 Setting to Work and Balancing 11.3.1 airconditioning are available of clear of any being applied

The commissioning team shall ensure that all the ventilation and air conditioning systems are mechanically completed and as built drawings are available of the total system, and ensure that the systems are completely clear of any obstructions, debris and superfluous matter prior to any test being applied and upon completion.

11.3.2 The commissioning and testing of the systems shall be carried out in accor accordance with the CIBS Commissioning Code - Series A Ductwork InstallatiInstallation. Particular attention shall be paid to the permitted tolerances specifie specified in these documents. 11.3.3 In addition to the above codes, systems shall generally be commissioned as follows follows :i)

After the false ceilings have been installed the equipment shall be operated under normal design ambient temperature and humidity conditions while making all required adjustments to automatic controls, air dampers, terminal units, their deflector blades, fans, etc. Until all performance requirements are met, all air systems and devices must be properly balanced.

ii)

Operate all fan systems to test air flow from all openings, make all necessary damper adjustments until design air flow is obtained throughout all the various systems.

iii) Operate all fire dampers, pressure control dampers etc. that are interconnected to the control system to ensure correct operation and annunciation at panels. Review instrument and electrical wiring diagrams to ensure correct installation. 11.3.4 After the air system has been balanced, all damper units shall be labelled to show the correct settings. Filters shall be checked and where necessary changed or cleaned before commissioning activity is completed. 11.3.5 The commissioning and testing of the control system shall be carried out in accordance with the CIBS Commissioning Code - Series C Automatic Control. 11.3.6 The complete HVAC control system inclusive of control panels ancillary equipment and interlocks shall be commissioned to operate in accordance with the performance requirements of the design specification such that under all load conditions it is stable to within the limits specified. 11.3.7 The commissioning engineers shall record all equipment settings and the actual values maintained in the controlled space during commissioning and when the total system is commissioned. These records shall form part of the final commissioning report. 11.3.8 A demonstration will be required prior to carrying out performance test, to show that all controls are operational and that all safety devices are in working order. 11.3.9 The refrigeration plant and system shall be commissioned in accordance with the CIBS Commissioning Code - Series R - Refrigerating Systems. 11.3.10 Upon completion of the plant commissioning a complete commissioning report report detailing all equipment settings system pressures and temperatures shall be shall be recorded for normal running conditions, low load and full load. If extra extra heaters are required for the full load test, commissioning team shall obtain obtain them.

11.4 Performance Tests (Cooling) 11.4.1 Within fourteen days of starting up fully commissioned systems, evidence that all controls are functioning correctly shall be required. A check of all controls, motors, fans, pumps, refrigeration machines, etc. shall be made, and flow and return temperatures shall be noted from all thermometers together with the external and internal temperatures at the time of measurement. 11.4.2 The commissioning team shall make temporary installation of portable recorders (thermohygrographs) and simultaneously record temperature and humidity within the controlled space location of test instruments shall be approved by the Company. The corresponding external dry and wet bulb temperatures shall also be recorded whilst these tests are in progress. 11.4.3 The recordings shall in each case be made during a seven day period, continuous over a weekend. The individual room temperatures shall be measured by mercury in glass thermometers and a sling hygrometer at four times of the day and night. After receiving a satisfactory report produced from the foregoing tests the Company shall issue approval of the installation. 11.5 Sound Level Tests 11.5.1 Sound level tests shall be carried out in areas selected by the Company when the mechanical systems are complete and operational. If tests are conducted in unfurnished spaces suitable allowances shall be made in the resultant noise ratings. 11.5.2 Results of test shall be submitted on the basis of octave band analysis on noise rating curve charts for each individual space. 11.5.3 Test shall be carried out using a DAWE or equivalent sound level meter coupled to an octave band analyser. The test results and recommendation for noise attenuation if any shall be produced in a noise report on the HVAC system and submitted to the Company for review/approval.

ATTACHMENT I HVAC TESTING AND COMMISSIONING BALANCING SHEETS I-1

Fan Commissioning Sheets (1 to 6)

I-2

Fan Performance Check Sheet

I-3

HVAC Fire Damper Check Sheets (1 to 2)

I-4

Branch Volume Test Sheet

I-5

H & V Terminal Survey Check Sheets (I to 2)

I-6

Air Conditioning System Commissioning Data (1 to 8)

I-7

Environmental Room Temperature Recording Chart

Note:

All

relevant

commissioning/testing

data

sheets

are

available

within

PETRONAS.

ATTACHMENT II TECHNICAL EQUIPMENT SPECIFICATIONS

II-1

HVAC Filter Coalescer/Separator

Specification

II-2

Mixed Flow Fans

Specification

II-3

HVAC Shut-off & Pressure Control Dampers

Specification

II-4

Pressure Relief Damper

Specification

II-5

HVAC Pneumatic Fire Damper & Fire Damper Control Panel

Specification

II-6

Terminal Unit

Specification

II-7

Weather Louvre

Specification

II-8

Induct Sound Attenuators

Specification

II-9

Air Handling Unit In Safe and Hazardous Areas

Specification

II-10

Air-cooled Air Conditioning Unit

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-I TECHNICAL EQUIPMENT SPECIFICATION FOR HVAC FILTER COALESCER/SEPARATION INDEX

1.

SCOPE

2.

FILTER/SEPARATOR

3.

ELECTRICAL DETAILS

1.

SCOPE This specification defines the design, and fabrication of Filter Coalescer/Separator for Marine Ambient Air Filtration.

2.

FILTER/SEPARATOR

2.1

GENERAL

2.1.1

The filtration system will comprise of a coalescer and inertial separator positioned at the inlet to ventilation and air conditioning systems.

2.1.2

The filtration system will be designed to reduce the concentration of salt laden water particles to not greater than 0.05 ppm by weight.

2.1.3

For details, duties and sizes of filtration system refer to PETRONAS filter Schedule.

2.1.4

The filtration system will include the necessary drains and self-priming traps. The trap, fitted external to the unit will be located in a position where the level of water can be visually checked and manually drained when necessary.

2.1.5

The filtration system will be so designed as to provide adequate access/easy removal of the first stage filter/coalescer panels for inspection/maintenance purposes.

2.1.6

The filter module support frame will be supplied with a 50 or 75 mm predrilled flanges.

2.1.7

The system will be so constructed as to allow the use of potable water for cleaning the first stage panel by means of a hose.

2.1.8

The filtration system will be suitable to operate a maximum external wind speeds of 63 m/s.

2.2

FIRST STAGE

2.2.1

This first stage will be a membrane filter coalescer consisting of random bonded nylon fibre held between layers of nylon coated galvanised wire mesh and corrugated to form a veeformation.

2.2.2

The membrane will be sealed into a channel frame to give a robust construction.

2.2.3

The channel frame will be constructed of stainless steel.

2.3

SECOND STAGE

2.3.1

This second stage will be a labyrinth separator consisting of a series of specially designed labyrinth plates with integral fins and tails held in accurate vertical spacing by locating bars on leading and' trailing surfaces arranged at suitable intervals to ensure the required rigidity.

2.3.2

The labyrinth plates will be made of aluminium alloy extrusions to B.S. 1474 with a clear chromic anodised finish.

2.3.3

The labyrinth plates will be set in a housing of aluminium alloy extrusions to B.S. 1474 with a clear chromic anodised finish.

2.3.4

The aluminium housing will incorporate a bottom drain section equipped with suitable seals to prevent by-passing of air while allowing adequate drainage.

2.3.5

The drain trough section will be made of aluminium alloy extrusions to BS 1474 HE 30TF, with a clear chromic anodised finish and will have flanged outlet connections to the drainage system.

2.3.6

All fixing screws will be zinc plated carbon steel fitting into stainless steel 'Heli-Coil' inserts in the aluminium alloy housing.

2.3.7

A seal will be provided at the top of the labyrinth plates to prevent cross-flow occurring.

3.

ELECTRICAL DETAILS

3.1

Each filtration system will come complete with pressure differential gauges for monitoring the stage of filtration system. A separate switch will provide an electrical signal to a remote control panel. (Panel supplied by Buyer). The electrical differential pressure switch shall be suitable to alarm when filter media becomes clogged, reset shall be manual.

3.2

Electrical controls for the filtration systems will have damp and dust protecting enclosures to I.P. 55.

3.3

All items will be provided with the necessary bosses for bonding so as to eliminate static electricity.

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-2 TECHNICAL EQUIPMENT SPECIFICATION FOR MIXED FLOW FANS

INDEX 1.

SCOPE

2.

DESIGN

3.

CONSTRUCTION

4.

ELECTRICAL MOTOR DETAILS

5.

ACCESSORIES

6.

TESTING

1.

SCOPE

1.1

This specification defines the design, construction, testing and inspection of mixed flow fans, their motor drives and accessories.

2

DESIGN

2.1

The fans will be of mixed flow type suitable for a marine environment, and the following maximum conditions:Ambient temperature Relative humidity

+40 °C up to 100%

2.2

The fans will have non-overloading, non-stall, and low noise level characteristics.

2.3

The motor will be externally mounted on the fan casing with a "V" belt drive from the motor to the fan impeller shaft.

2.4

The noise generated by fan and motor will be kept to a minimum, whilst ensuring optimum power efficiency. Consideration will be given to ensure that noise generated by the selected fan unit does not exceed the design parameters in PTS. 31.29.00.31 Noise Limitations Equipment.

2.5

The supply fans shall be selected to give a steep fan characteristic curve to ensure that at a wind speed of 45 m/s the reduction in supply volume is no greater than 15 - 20% of the designed volume, and at a wind speed of 25 m/s the fans shall be capable of operating at 100% design volume.

2.6

The extract fans shall be capable of operating at 100% design volume with wind speed down to 0 m/S and by modulation of inlet guide vanes and module pressurisation control dampers maintain a positive pressure within the safe area controlled space. This requirement shall be when extract fan outlets are in a negative pressure area i.e. wind effect aids fan performance.

3.

CONSTRUCTION

3.1

The fan casing will be constructed from heavy gauge mild steel plate, with a minimum thickness of 5mm, and accurately rolled ensuring a good airtight cylindrical shape.

3.2

Mild steel flanges of minimum 5mm thickness will be rolled integral with the fan casing to give added rigidity, the flanges will be 50mm wide and suitably drilled for flexible duct connections.

3.3

A mating frame for mounting the motors will be welded to the outside of the fan casing.

3.4

The centre body assembly will comprise of an aerodynamically shaped housing, accurately jig welded in position forming an integral part of the fan casing. The housing will be constructed from heavy gauge mild steel of a minimum 5mm thickness, incorporating stiffening and bearing support plates.

3.5

The centre body assembly will be concentrically supported by aerodynamically shaped downstream guide vanes constructed from mild steel plate, the guide vanes will be spared to obtain optimum fan efficiency, and fully welded to the inside face of fan casing and periphery of centre body assembly.

3.6

The fan impeller will comprise of suitably design steel die formed blades, jig welded to an aerodynamically shaped hub. The outer edge of the impeller blade will be rigidly held by the mild steel spun shroud ring fully welded to the blades after construction.

3.7

The fan impeller will be mounted on a high tensile steel shaft, ground to close limits on bearing blocks and attached by suitable keyway. The fan drive pulley will be attached to the shaft by a suitably keywayed taper lock. The fan impeller will be securely held to the shaft end, by end plate and locked setscrew.

3.8

The fan will be fitted with an aerodynamically designed inlet cone, fabricated from mild steel plate. The inlet cone will be removable to facilitate inspection and removal of rotation parts.

3.9

Brass rubbing strips of adequate width and thickness will be provided on the centre body assembly, to ensure that should the impeller foul any stationary parts when operating, sparking does not occur.

3.10

Bearings supporting the fan impeller shaft will be self-aligning deep grooves ball journals and supported rigidity from the center body assembly. Extended lubrication points will be taken from the bearing reservoir to the outside of the fan casing, located in accessible positions for routine lubrication.

3.11

The fans will be provided with a suitable robust mild steel support frame of welded/bolted, constructed, to facilitate removal of fan or motor. The frame will incorporate a suitable method for fully belt tensioning and motor alignment, and provide suitably drilled holes in accessible positions in the support frame for bolting to adjoining steelwork.

3.12

The fans will be provided with suitable anti-static V-belt drivers to BS. 3790 selected to suit speed and power transmitted. The V-Belt driver external to motor and fan casing will be totally enclosed within a mild steel casing to BS. 5304 and BS.CP 3304.

3.13

Upon completion of fabrication the fan casing, centre body and motor platforms will be thoroughly degreased and hot dipped galvanised to BS. 729, ensuring complete cover with adequate thickness of galvanising.

3.14

Impellers, inlet fairing and belt guards will be finished with a high-build paint. This finish will consist of blast cleaning, the application of a base primer, a Hi-build second coat and a modified vinyl top coat. The dry film thickness will be a minimum of 200 microns. The blast cleaning will comply with table 5 of B.S. 5493, the vinyl top coat colour will be beige - B.S. 4800, 10.B.21.

3.15

All fasteners will be cadmium plated to BS. 1706.

3.16

All items of equipment will be provided with the necessary bosses/for bonding so as to eliminate static electricity.

4

ELECTRICAL MOTOR DETAILS

4.1

All motors will be suitable for direct on-line starting and will comply with the requirements as specified.

4.2

The electrical content of this equipment shall be in accordance to PTS.33.65.05.31 Electric Motors, Three-phase, Cage-induction type.

5.

ACCESSORIES

5.1

Anti-vibration Isolators:

5.1.1

The fans will be provided with suitable spring type anti-vibration isolators to give a minimum of 95% vibration isolation. The anti-vibration isolators will be of the totally enclosed type, suitable for marine environment.

5.2

Flexible Connections:

5.2.1

All fan inlet and discharge connections will be fitted with flanged fire resistant flexible connections.

5.3

Non Return Damper (Gravity Operated)

5.3.1

The fan discharge shall have a non return damper mounted after the discharge flexible connection.

5.3.2

The thickness of the damper casing will be a minimum of 5mm. The casings will be hot-dip galvanised to BS. 729. The blades and spindles shall be stainless steel, running in bronze bushes.

6.

TESTING

6.1

The fan impeller and drive shaft will be statically and dynamically balanced before and after fitting to the fan casing.

6.2

Standard fan performance test certificates to BS. 848 Part 1 produced at fan design stage will be supplied upon request.

6.3

Substantiation that the above volumes against the stated wind conditions can be achieved by the fans submitted by the vendor must be guaranteed in writing.

6. 4

Fabrication curves are also to be supplied with the following wind speeds plotted on the chart 0 m/s, 26.8 m/s and 53.64 m/s, together with the system resistance to give the fan operating points at each wind speed.

6.5

The vendor will include induct fan sound power spectrum for the octave bands 63 Hz to 8K Hz for all fan equipment. The vendor shall guarantee that the stated noise levels of their equipment will comply with PTS 31.29.00.31. Noise Limitations for Equipment.

6.6

The mixed flow fan will have located in a good visual position, a brass nameplate securely attached to the casing by brass steel pins, stamped with the following:Manufacturer Air Volume Purchasers Item No. Serial No. Impeller Speed Fan Pressure Shaft Speed Elec. Supply

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-3 TECHNICAL EQUIPMENT SPECIFICATION FOR HVAC SHUT OFF & PRESSURE CONTROL DAMPERS INDEX 1.

SCOPE

2.

DAMPER DESIGN

3.

DAMPER CONSTRUCTION

4.

ACTUATOR

5.

INDICATING SWITCH

6.

FAN SHUT-OFF APPLICATION

7.

PRESSURE CONTROL APPLICATION

8.

ELECTRICAL REQUIREMENTS

9.

GENERAL REQUIREMENTS

1.

SCOPE

1.1

This specification defines the design and fabrication of the air conditioning/ventilation, shutoff, constant volume and pressure control dampers.

2.

DAMPER DESIGN

2.1

The dampers will be a minimum 95% air tight with respect to rated air flow extracted from the HVAC damper schedule when the blades are in the closed position and suitable for medium/high velocity and pressure systems (+3000 Pa to -3000 Pa).

2.2

The dampers will consist of area foil blades fixed on a stainless steel spindle, set in bearings, and arranged in frames, to rotate in opposed directions to either close or open.

2.3

The dampers will be sized such that the blades do not extend beyond the frame when in full open position.

3.

DAMPER CONSTRUCTION

3.1

The blades will have a aerofoil profile to minimise system air resistance when damper is in the fully open position, the blades shall be fabricated from stainless steel of sufficient thickness to withstand the normal working conditions, as stated in 2.1 above, without distortion.

3.2

The low leakage seal will be a closed cell neoprene material fixed to the blade edges, and inside edge of the frame, such that replacement seals can be fitted.

3.3

The blades will be securely fixed to stainless steel rod spindles, which shall rotate in self lubricating bearings.

3.4

The whole blade arrangement will be mounted at the bearings in a galvanised sheet steel frame, with a minimum thickness of 3mm, and suitably wide flanges pre drilled for connection to ductwork or mechanical equipment. All joints in the frame shall be welded to form a secure and regular support, to allow the blades to freely rotate and maintain their alignment within the casing.

3.5

Each spindle in the damper will be interconnected to a common linkage system so that an opposed blade action can be obtained. This linkage will then connect to a pneumatic actuator.

4.

ACTUATOR

4.1

The pneumatic actuator for the induct shut off dampers, pressure control dampers and constant volume damper will be capable of operating the linkage at the pressure of 140 KPa (20.3 psig) and will be a double acting type, with positioner and spring return arrangement, which will close the damper on instrument air failure.

4.2

Shut off damper where required may be operated via a halon 1301 system, the actuator and suitable pressure reducing sets shall be mounted within the control panel of the shut off damper.

4.3

The pneumatic actuator for fan shut off dampers will be capable of operating the linkage at a pressure of 414 KPa (60 psig) and ,will be a double acting type which shall close the damper on instrument air failure.

5.

INDICATING SWITCH

6.

FAN SHUT-OF APPLICATION

6.1

The fan shut-off dampers shall be suitable for use in a high velocity/pressure ductwork system, having a maximum air velocity/pressure.

6.2

The shut-off dampers shall be either connected directly to or close to fan discharge openings, and will therefore be subjected to maximum velocity/pressure.

7.

RESSURE CONTROL APPLICATION

7.1

Pressure dampers will be suitable for use in medium/high velocity ductwork with a maximum air velocity of 20 m/s, the dampers will be located in-duct, and supplied with flanges predrilled.

7.2

All pressure dampers will be capable of operating in conjunction with module pressurization controls in the HVAC automatic controls system. Damper actuator will operate on signal from a differential pressure transmitter, via a controller, signal pressure will be between 20 KPa and 100 KPa.

8.

ELECTRICAL REQUIREMENTS

8.1

Control supply shall be 24V D.C.

8.2

Dampers shall be fitted with terminal/junction boxes, wiring to boxes will pass through flame proof terminating glands.

9.

GENERAL REQUIREMENTS

9.1

Dampers will be suitable for operating in air stream with a temperature band of -0 °C to 45 °C.

9.2

The dampers will operate in such a manner as to prevent friction sparks etc., and be fitted with earthing bosses for bonding, to prevent static electricity occurring.

9.3

All materials used in the damper manufacture will be smokeless and non-combustible. The neoprene seal will be : EPDM closed cell sponge flame retardant D105643B/FZ-RA26 from Rubber Astic Ltd., Old Park Road, Wednesbury West Midlands, or equal.

9.4

All damper dimensions will conform to the HVAC damper schedule.

9.5

The galvanised sheet steel frame shall be hot dipped galvanised after manufacture.

9.6

The electrical & instrument content of this equipment shall be in accordance with the following: PTS 20.078 The Design & Specification of Instruments

PTS 20.083 Standard Engineering Specification for Design, Installation and Testing Of Electrical Systems (Onshore and Offshore).

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-4 TECHNICAL EQUIPMENT SPECIFICATION FOR PRESSURE RELIEF DAMPERS

INDEX 1.

SCOPE

2.

DESIGN

3.

CONSTRUCTION

1.

SCOPE

1.1

This specification defines the design, construction and inspection of air pressure relief dampers for ventilated enclosures:-

2.

DESIGN

2.1

The dampers shall be of the multi-blade type, enclosed in a rigid welded frame.

2.2

The damper blades shall only open when the airflow is in one direction and close against neoprene seals then the air flow ceases or a back draught condition occurs.

2.3

The damper blades shall be held closed by an adjustable spring balance arrangement, the balance arrangement shall be capable of site adjustment to give the required opening pressure. The minimum lift off damper pressure shall be in the region of 100 Pa differential Pressure (approx. 10mm WG).

2.4

Ventilation air supplied to enclosures shall exhaust through the relief dampers, where no provision for an extract air system is provided.

2.5

For damper sizes refer to pressure relief damper Schedule.

3.

CONSTRUCTION

3.1

The frame shall be manufactured from type 321 stainless steel with a minimum thickness of 2.6mm.

3.2

The frame shall be 200mm deep with 50 mm wide pre-drilled flanges, the frame shall incorporate top and bottom blade stops.

3.3

The blades shall be a formed section from type 321 stainless steel and minimum thickness of 0.9mm, welded to 6mm diameter stainless steel spindles rotating in specially impregnated oil tight bearings. A strip of flame retardant neoprene shall be bonded to the back of each blade to form a seal between adjacent blades. The seal shall be fitted in such a manner as to facilitate easy replacement. The blades shall swing apart when the upstream static pressure rises. They shall be kept from fouling the inside of the frame by the impregnated phosper-bronze bearing flanges.

3.4

The spindles shall be linked together with an external linkage so that the opening characteristics of the damper can be altered on site. The linkage material shall be type 321 stainless steel.

3.5

The linkage arrangement shall incorporate a tension spring to maintain the dampers in the closed position when not in use, the damper tension spring material shall be stainless steel, to DIN 17224.

3.6

The pressure relief damper shall operate in such a manner as to prevent friction sparks etc. and will be provided with the necessary bosses for bonding so as to eliminate static electricity occurring. All welds shall be continuous except where unacceptable distortion would occur where seams are in accessible to normal welding equipment. All welding shall be to ASME IX 1980 edition.

3.7

All materials used shall be suitable for use in a salt laden marine/petrochemical environment with due consideration to temperatures of +40 °C and 100% Relative Humidity.

3.8

All other nuts, bolts and washers shall be of 316 Grade stainless steel.

3.9

Each damper shall have a 316 grade stainless steel label showing the following information: Manufacturer Serial No. Purchase Order No. Equipment Tag. No. Weight in Kg. Airflow Arrow Duct Size in mm

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-5 TECHNICAL EQUIPMENT SPECIFICATION FOR HVAC PNEUMATIC FIRE DAMPERS AND FIRE DAMPER CONTROL PANELS

INDEX 1.

SCOPE

2.

FIRE DAMPERS

3.

OPERATION OF MANUAL FIRE DAMPERS

4.

OPERATION OF PNEUMATIC FIRE DAMPERS

5.

LOCAL FIRE DAMPER CONTROL PANELS OPERATION

6.

LOCAL FIRE DAMPER CONTROL PANELS CONSTRUCTION

7.

CONTROL PANEL TESTING & INSPECTION

1.

SCOPE This specification defines the design, fabrication, installation and operation of single and multiblade pneumatic fire dampers and fire damper control panels. NOTE: Where reference is made to stainless steel in this section, it shall be AISI 312 S12 unless stated otherwise.

2.

FIRE DAMPERS

2.1

General

2.1.1

For details duties and sizes of fire dampers, refer to fire damper Schedule.

2.1.2

Fire dampers shall be of the single or multiblade design type suitable for both vertical and horizontal operation.

2.1.3

The fire dampers (i.e. blades, housing, mechanism and controls) shall be tested and rated for not less than two hours, in accordance with BS476. The fire dampers shall have the Appropriate Certifying Authority approval from Lloyds of London and or Det Norske Veritas as suitable for AO rating and for use in A60 bulkheads with suitable extension ducts and insulation. Copies of certifying documentation for AO rated fire dampers shall be supplied.

2.1.4

The fire dampers shall be a minimum 95% air tight with respect to rated air flows extracted from fire damper schedule when the blades are in the closed position and suitable for medium/high velocity and pressure systems (+2500Pa to -2500Pa).

2.1.5

For details on specifications applicable to fire dampers & control panels electrical and instrumentation refer to the following: PTS 20.078 The Design & Specification of Instruments PTS 20.083 Design, Installlation and Testing of electrical systems (onshore & offshore)

2.2

Fire Damper Fabrication

2.2.1

The frame shall be 500mm deep and manufactured from 3.2mm stainless steel for dampers having width or height up to 500mm, and 4.8mm stainless steel for dampers having width or height 500mm to 1000mm for dampers above 1000mm 6.3mm stainless steel shall be used. The casing shall be extremely rigid to keep the blades and shaft in proper alignment and prevent chattering, binding, etc.and to ensure dependable damper operation.

2.2.2

The damper blades shall be flat plate of 6.3mm (1/4 inch) stainless steel and shall have parallel action. The blades shall be welded to the shafts. The blade length shall be limited to 700mm. Central millions shall be fitted on dampers larger than 700mm wide.

2.2.3

The shafts shall be continuous 19mm (3/4 inch) diameter AISI 321 S20 stainless steel and shall rotate in 19mm (3/4 inch phosphor-bronze oil-tight bearings specially impregnated with Cresta FC and Molybdenum Disulphide. The bearings shall be fitted into bearing bosses welded to the outside of the frame. The centre line of the bearings being 100mm from the edge of the frame.

2.2.4

All spindle connecting rods and linkages shall be mounted on the out-side of the frame and shall be of stainless steel.

2.2.5

The gap between the ends of the blades and the inside of the casing shall be sealed by the use of stainless steel blade angle stops.

2.2.6 The frames shall be so formed so as to include 50mm or 75mm flanges drilled at 150mm centres.centres. The flanges being 50mm for dampers up to 700mm, width or height and 75mm above above this duct size. All fire dampers shall have 152mm long mounting channel, 6mm thick bolted bolted to the unit at the damper blade exposed end. 2.2.7

The control equipment and linkage shall be housed in an enclosure of 3.2mm, 4.8mm or 6.3mm stainless steel which shall form an integral part of the frame. The enclosure shall be fitted with a removable 3.2mm stainless steel front cover plate and filtered vent (Peter/Paul Tube) 75mm minimum length, and an instrument air bulkhead connector for connecting pneumatic piping. For fire dampers in A60 installations pre-insulated (A60 rated) front cover panels shall be used.

2.2.8

The damper shall be fitted with a local blade position indicator which shall consist of a AISI 321 S20 stainless steel pointer moving over an ICI VYNALAST scale mounted on the enclosure front plate. The scale shall have a backing of 6mm thickness insulating material.

2.2.9

All fire dampers shall have an ICI VYNALAST identification liable showing the following mounted on the front plate. Manufacturer Duct size in mm Serial Number Unit weight in Kg Purchase Order No. Airflow arrow Equipment Tag No.

2.2.10 All welds shall be continuous except where unacceptable distortion would occur or where seams are inaccessible to normal welding equipment. 2.2.11 All material used shall be non-corrosive, non-combustible and non-smoke producing and shall be suitable for use in a Marine/Petrochemical environment with due consideration to the presence of Marine Aerosols and high humid temperatures upto 40 °C. 2.2.12 All nuts, bolts and washers shall be of stainless steel and all tube fittings shall be of the double ferrule compression type. 2.2.13

All dampers shall be fitted with four lifting lugs.

2.2.14

Fire dampers shall have earthing bosses welded to dampers consisting of a 40mm diameter stainless steel boss fitted with a 10mm brass stud complete with non-ferrous washers and nuts.

2.2.15 Fire dampers where required shall be fitted with emergency air cylinders mounted within damper panel to give damper operation once only (open.close) on instrument air failure. A non-return valve shall be installed between bulkhead fitting and air cylinder. 3.

OPERATION OF MANUAL FIRE DAMPERS

3.1

The stainless steel fire damper blades shall be held open by means of an approved pattern quartzoid bulb and spring loaded plunger. The blades shall be held open against the tension of a spring connected to the blade linkage. The spring material shall be DIN 17223 Class stainless steel.

3.2

The damper shall close when the temperature set point of the quartzoid bulb is reached (68 °C ± 2) releasing the tension spring and blades thus closing the damper.

3.3

The damper shall be fitted with a lever for manually adjusting the open position of the damper blades so that the fire damper can also be used for balancing purposes. This facility for blade position adjustment shall not affect the fail-safe operation of the fire damper i.e. when the frangible bulb breaks the damper shall close. This lever may also be used to override the frangible bulb for test purposes.

3.4 that

The frangible bulb plunger mechanism shall be removable from the damper enclosure such that replacement of frangible bulbs can take place external to damper and ductwork system.

4.

OPERATION OF PNEUMATIC FIRE DAMPERS

4.1

The pneumatic actuator shall be a totally enclosed single acting spring return semi-rotary (90 degrees) unit fitted directly to the damper drive shaft and housed inside the enclosure. The actuator shall be of steel construction and suitable for clean dry instrument air sized to operate at 4 bar. The actuator shall be connected by stainless steel pipe to a bulkhead fitting mounted on the undersized of the enclosure, suitable for connecting to 6mm (¼" O/D) 316 stainless steel pipe with Crawford swagelock double ferrule compression fittings.

4.2

A solenoid valve shall be mounted in the enclosure and will be a normally energised 3 way two position type, positioned in the pneumatic line between the actuator and the bulkhead fitting termination point. The solenoid valve shall be fitted with electrical protection for surge suppression. The integral bridge diode shall be used and suitable for 24 Volt DC supply which shall allow universal polarity. The solenoid valve shall be BASEEFA approved for Zone 1 hazardous areas gas group IIA & B temperature Class T6. The solenoid shall be Maxseal 1CO4 type or approved equivalent.

4.3

The fusible link shall be an air trigger diaphragm valve type operated by a quartzoid bulb set at 68°C±2°C. When the frangible bulb breaks the actuator shall be exhausted of instrument air, hence closing the fire damper.

4.4

A second solenoid valve shall be mounted in the enclosure and shall be positioned in a pneumatic line running parallel to the main actuator supply line and also between the fusible link diaphragm valve assembly and the actuator. These two pneumatic lines shall be connected to the supply at the bulkhead fitting. The solenoid valve shall have a full wave diode bridge for surge suppression. The diodes shall be suitable for 24 Volt DC supply and shall allow universal polarity and be mounted within the solenoid. The solenoid valve shall be BASEEFA certified for Zone i hazardous areas gas Group IIA & B temperature Class T6. The supply voltage shall be 24 Volt DC normal running but be capable of operating down to 20.5 volts and up to 27.5 volts. The fire damper may be opened by energising this solenoid. This arrangement allows the fire damper to be re-opened when the damper has closed via fracture of the quartzoid bulb for removal of smoke. This system will operate efficiently as long as the failure temperature of any component within the fire damper and associated system is not exceeded. Because of this facility of overriding the fire damper, provision shall be made at local fire damper control panels and main control panel to show what fire dampers have been put into this condition by the local fire damper control panel. Provision shall be made available at the main control panel to override local panel and isolate (shut) all fire dampers if required by the main platform operator. The solenoid valve shall be Maxseal ICO4 type or approved equivalent.

4.5

All electrical connections shall be made using cables which comply with flame retardant reduced toxicity type sheath with an oxygen index greater than 30 and with an HCL emission when burned of not more than 17% by weight of compound. Termination, junction boxes and glands shall be certified for use in a Zone 1 hazardous area with gas Group IIA & B.

4.6

The fire dampers shall be fitted with three microswitches, one of which shall be operated when the fire damper opens and the other two when the fire damper closes. The microswitches shall be operated by a cam on the drive shaft and shall be single pole changeover clean contact type. They shall be certified to BS4683 Part 4 for Zone 1 hazardous areas suitable for gas Group IIC temperature Class T6. The cable connections to the junction box shall be in accordance to the cable specified in 4.5 and flameproof termination glands.

5.

LOCAL FIRE DAMPER CONTROL PANELS OPERATION

5.1

Accommodation & Production Deck Area

5.1.1

A local control switch panel shall be mounted on the external wall of the accommodation module and production/utility deck enclosures to open and close the pneumatically operated fire dampers local to the enclosure.

5.1.2

The local fire damper control panels shall preferably be located in a non-hazardous area. Where the control panels have to be located in Zone I or Zone II areas, they shall be certified for use in the required areas of operation and certification documentation shall be supplied for all classified equipment.

5.1.3

The panels shall comprise a weatherproof IP55 surface mounted stainless steel cabinet with a lockable front door. Mounted on the door of the panel shall be:(i)

One three position switch to open and close extract fire dampers for each zone allocated to that panel. Position 1 open (Key Enable) Position 2 normal and Position 3 closed (both maintained).

(ii)

One three position switch to open and close supply fire dampers for each zone allocated to that panel. Position 1 open (Key Enable) Position 2 normal and Position 3 closed (both maintained).

(iii)

A fire damper closed indicator light for each of the fire dampers shall be allocated in the local fire damper control panel, the colour of the lamp shall be yellow.

(iv)

A key enable switch to energise the normal de-energised solenoid electrical circuits, of the three position switches. One key enable switch for each panel.

(v)

A push button to test all fire damper closed lights.

5.1.4

Power to the fire damper electrical circuits shall come directly to the local panel, which shall house the necessary relays. The relays shall be 24 Volt DC type.

6

LOCAL FIRE DAMPER CONTROL PANELS CONSTRUCTION

6.1

The panels shall be wall mounted and constructed from stainless steel having a thickness of 2.0 mm and weatherproofed to IP55. All welding shall be neat, uniform and strong enough to withstand the normal stresses imposed upon it. Welding shall have 100% penetration and be free from slag inclusions. All welds shall be fully cleaned and free from burrs on completion. There shall be no gaps or openings permitted. Fire resistant rubber gasketing shall be provided on all joints to ensure a completely weatherproof and dust tight enclosure.

6.2

Holes and cut-outs shall be cleanly drilled or cut. No gas cutting processes shall be employed. All sharp edges shall be removed. All holes including label fixing shall be drilled prior to installation of equipment. Provision shall be made for cables to enter from the bottom, and or top of the panels dependent upon panel location.

6.3

The control panels shall be designed and manufactured to facilitate inspection, cleaning, repair and maintenance and to ensure absolute safety during operation, inspection and maintenance. Access to the inside of panel enclosures shall be via hinged doors, a minimum of 3 hinge points and 3 latch points shall be provided on each door.

6.5

All terminal blocks shall be rail mounted and located at bottom of panel for bottom entry field cables. In all cases sufficient room must be allocated between terminal blocks and glands. Cables must not impede access to rack mounted equipment, a clearance space of 300mm is

required at the bottom and/or top of the panel for cable entry terminations by buyer. Terminal blocks at the bottom of the rack shall be protected against mechanical damage due to dropping of tools, etc. Not more than two wires shall be connected to any one terminal, jumper terminals shall be provided where more connections are required to one point. All terminal blocks shall be Klippon manufactured or equal and approved with a permanent easily readable numbering system of identification. 6.6

All internal wiring shall be carried out with stranded copper conductor cables of not less than 2.5 sq.mm. cross sectional area, 600/1000V grade PVC insulation, to B.S. 6231 Type B Specification. Cables less than 2.5 sq.mm may be used to conserve space and connection details subject to PETRONAS approval. Flexible cables shall be used for wiring equipment on doors and shall be so arranged that it is not possible for wiring to be trapped by door movement. This wiring shall be loomed together, wrapped with flexible PVC coil for protection and be firmly clamped at both ends to prevent movement at terminations. Wiring shall be neatly arranged in looms of not more than 25 cables. The wiring shall be positioned and routed so as to minimise the possibility of mechanical damage. All terminals on hinged panels shall be fully shrouded.

6.7

All metallic non-current carrying parts shall be electrically bonded to the main enclosure, either by welding or bolting using star washers or equal. The main enclosure shall be earthed to a hard drawn high conductivity copper earth bar, which shall run the entire length of the control panel. The control panels shall have provision for connecting to the main platform earthing system by means of two MIO size earthing terminals, one at each end. All doors shall be bonded to the main enclosure by means of a flexible braided electro-tinned copper strap, arranged so that it cannot be trapped as the door is opened or closed.

6.8

All items of equipment mounted on the face of the control panel or inside shall be provided with labels denoting their function. A main label shall be fixed in a prominent position giving the following information. Panel Tag No. ____________

System Voltage

_____________

Panel Title

____________

Supply From

_____________

Panel Weight

____________

Isolation At

_____________

6.9

All relays shall be identified with a designation label devised by the panel manufacturer and detailed on vendor prints/wiring diagrams to facilitate identification of their function. Unit designation labels shall have black lettering engraved on a white background, the lettering having a minimum height of 5mm. Labels and fixing screws shall be of non-corrodible material. Where access to live terminals is unavoidable the terminals shall be shrouded and an internal warning label shall be provided with red lettering on a white background, the lettering having a minimum height of 5mm.

7.

CONTROL PANEL TESTING &-INSPECTION

7.1

Standard of workmanship and general finish shall be checked and the results of all tests and checks are to be recorded in the form of an inspection certificate copies of which shall be supplied to the company.

7.2

The panels shall be completely assembled for inspection.

7.3

All electrical wiring shall be disconnected from equipment to prevent damage, except terminal blocks switches etc., and shall undergo a 500 volt megger test. insulation resistance shall - be less than 100 Megohm. Earth continuity not shall not be greater than 1 ohm.

7.4

All panel wiring shall be checked point by point for continuity against panel wiring diagrams/vendor prints.

7.5

All relays and circuitry integral with the panel shall be subject to a simulation test. All relays supplied by the manufacturer shall be of one type.

7.6

All material which is not in conformance with this specification and the related documentation which form the technical design and intent of the Buyers Contract with the Seller, will at the buyers' request be replaced by the seller without extra charge.

7.7

The panels shall be tested under conditions representative of normal offshore platform working. All electrical/electronic components are to be connected to a power supply for a period of riot less than 7 days to ensure failure of components does not occur due to overheating.

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-6 TECHNICAL EQUIPMENT SPECIFICATION FOR TERMINAL UNITS

INDEX 1.

SCOPE

2.

SUPPLY GRILLES

3.

EXTRACT GRILLES

4.

SUPPLY AND EXTRACT DIFFUSERS

5.

SUPPLY AND EXTRACT LINEAR GRILLES

6.

SUPPLY LINEAR SLOT DIFFUSER

7.

OPPOSED BLADE DAMPERS

8.

GENERAL

9.

FIXING/SUPPORT OF GRILLES AND DIFFUSERS

10.

PAINTING

1.

SCOPE This specification defines the design and fabrication of supply and extract grilles, diffusers, linear grilles, linear slot diffusers, extract valves and transfer grilles.

2.

SUPPLY GRILLES

2.1

Supply grilles shall be of the double deflection type with the front set of blades horizontal.

2.2 All louvre blades shall be aerofoil in section, pivoted at the front face and individually adjusta adjustable by means of a key. 2.3

Grille border widths shall be 32mm. The grille flange shall be 32mm wide with a square edge 5mm deep.

2.4

All components shall be manufactured high grade extruded aluminium sections.

3.

EXTRACT GRILLES

3.1

Extracts grilles shall be of the single deflection type with fixed vane in the horizontal position.

3.2

Floor extract grilles shall be of the single fixed bar type with heavy blades designed to withstand personnel walking over them.

3.3

Other details for extract grilles shall be as for supply grilles described in part 2.0 of this specification.

4.

SUPPLY AND EXTRACT DIFFUSERS

4.1

Diffusers shall be of the one way, two way, three way or four type as indicated in the schedule.

4.2

The core shall be removable to allow easy access to the opposed blade damper and for fixing the diffuser body to the ductwork.

4.3

All components shall be manufactured from high grade intruded aluminium sections.

5.

SUPPLY AND EXTRACT LINEAR GRILLES

5.1

Linear grilles shall be of the continuous fixed bar type with a horizontal slot, with all blades at a 12.5mm centres.

5.2

Linear grilles fixing to plenum box shall be by means of a slip joint formed between the grille body and plenum box, and secured by means of pop rivets or self tapping screws.

5.3

Supply and extract linear grilles shall be suitable for use with a plenum box. The plenum box shall be part of the terminal sellers supply.

6.

SUPPLY LINEAR SLOT DIFFUSER

6.1

Linear diffusers shall be of the continuous slot type with a slot width of 32mm. The number of slots required shall be as shown on the terminal unit schedule.

6.2

Each slot shall be provided with a control blade for separate air pattern and volume control adjustment. The air pattern controllers shall be adjustable from the face of the diffuser to enable adjustment through full 180°.

6.3

Ends of all diffuser runs shall be fitted with air tight end caps. All necessary blanking plates between plenums to be provided. Adjacent sections of multiple section diffusers shall be joined using key strips designed to ensure positive alignment.

6.4 Where diffusers are required to have 30°, 45°, 60° or 90° change of direction, factory made dummy dummy sets with mitred corners and slot blanking plates shall be supplied which will be fixed to the to the diffuser using key strips supplied. 6.5

All components shall be manufactured from high grade extruded aluminium sections.

6.6

The diffuser supplied shall be suitable for use with a plenum box. Mounting brackets will be of the concealed fixing type which will fix the diffuser to the plenum box, final tightening being by means of a screwdriver through the slots of the diffuser.

6.7

The plenum box shall be part of the terminal unit sellers supply. Each plenum box section is to be purpose made for the linear diffuser supplied. For dimensions refer to terminal unit schedule.

6.8

The maximum height of the plenum shall be 400mm.

6.9

Each plenum box section shall have one 100, 150 or 200mm - Diameter Duct Spigot. The spigot is to include a hand operated volume control damper. (Complete with locking nut and damper open/closed quadrant/indication markings).

6.10

The plenum box shall be made from 20 gauge galvanised sheet steel.

7.

OPPOSED BLADE DAMPERS

7.1

Opposed blade dampers shall be fitted to all supply and extract grilles and diffusers.

7.2

The blades and frame shall be of aluminium.

7.3

The adjustment of dampers shall be carried out via the front of grilles with the aid of a removable key and/or a screw driver.

8.

GENERAL

8.1

Sizes/duties of terminal units shall be as specified in the terminal unit schedule.

8.2

All grilles and diffusers shall be fitted with non-combustible and smokeless sealing strip fitted behind the face which shall form an air tight seal when fitted to ductwork.

9.

FIXED/SUPPORT OF GRILLES AND DIFFUSERS

9.1

Diffusers/Grilles

9.1.1

Fixing shall be by means of a slip joint formed between the diffuser body and the ductwork, and secured by means of pop rivets or self tapping screws or concealed type fixings as supplied by terminal unit manufacturer.

10.

PAINTING

10.1

All supply and extract grilles and diffusers, linear grillers, linear slot diffusers and extract valves in accommodation module, control rooms and laboratory will be finished in standard gloss white.

10.2

All supply and extract grilles, and diffusers and floor extract grilles in switchgear substations and workshops on utilities & production decks will be finished in standard silverstone.

10.3

All door/wall transfer grilles will be finished in standard silvertone.

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-7 TECHNICAL EQUIPMENT SPECIFICATION FOR WEATHER LOUVRES

INDEX 1.

SCOPE

2.

LOUVRE DESIGN

3.

LOUVRE CONSTRUCTION

1.

SCOPE

1.1

This

2.

LOUVRE DESIGN

2.1

Weather louvres shall be of the fixed blade type with blades set at 45° to the air flow and arranged such that the blade edge drains out of the louvre assembly. Insect screens shall be installed on the inside face of all louvres.

3.

LOUVRE CONSTRUCTION

3.1

The louvre blades shall be fabricated from marina grade AISI 321 stainless steel of sufficient thickness to withstand wind speeds up to 53 m/s without distortion or abnormal blade movement.

3.2

The louvre blades shall be securely fixed to a marine grade stainless steel channel frame. The channel frame shall be a minimum 5mm. thick, with the rear flange of he unit drilled for connection to other equipment/ductwork.

3.3

All welds shall be continuous except !Where unacceptable distortion would occur or where seams are in accessible to normal welding equipment. All welding shall be to ASME IX 1980 Edition.

3.4

The weather louvres shall be provided with earth bonding bosses/studding to eliminate static electricity.

3.5

Each weather louvre shall have a 316 grade stainless steel label showing the following information:

specification

defines

Manufacturer Serial No. Purchase Order No. Equipment Tag No.

the

design

and

Weight in Kg. Airflow Arrow Louvre Size in mm.

fabrication

of

weather

louvres.

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-8 TECHNICAL EQUIPMENT SPECIFICATION FOR INDUCT SOUND ATTENUATORS

INDEX 1.

SCOPE

2.

ATTENUATION DESIGN

3.

LOW VELOCITY ATTENUATOR CONSTRUCTION

4.

HIGH VELOCITY ATTENUATOR CONSTRUCTION

5.

EXTERNALLY LOCATED ATTENUATOR CONSTRUCTION

6.

ACOUSTIC INFILL

7.

ACCEPTABLE NOISE LEVELS

8.

GENERAL REQUIREMENTS

9.

VENDORS GUARANTEE

1.

SCOPE

1.1

This specification covers the design, manufacturer and testing of induct sound attenuators.

2.

ATTENUATOR DESIGN

2.1

Sound attenuation in the ductwork systems shall be achieved by installing 6m length of internal duct lining on all supply and extract fan sets. If however, the required attenuation is not obtained primary attenuators provided in the Plant room and secondary attenuators where necessary in the distribution ductwork shall be installed to meet the required noise level in the space.

2.2

Attenuators shall be divided into three types:(a) (b) (c)

Low velocity internally located. High velocity internally located. Externally located exposed to a humid, salt laden and corrosive atmosphere.

3.

LOW VELOCITY ATTENUATOR CONSTRUCTION

3.1

These attenuators shall be constructed of 1.2mm pre galvanised mild sheet casing with lock formed longitudinal joints.

3.2

Flanges shall be spot welded to each end of the casing and shall generally be fabricated from 16 gauge pre galvanised sheet. Where the longer side exceeds 1200mm the flange shall be of 5mm rolled steel angle galvanised after manufacture. All welds shall be cleaned and made good with "Galvafroid" or equivalent.

3.3

Arranged with the casings shall be attenuating splitter setting of 0.6mm thick pre-galvanized perforated sheet steel with acoustic infill fixed to the casing with self tapping screws. The ends of each splitter section shall be suitably shaped to increase the sound absorption from the passing air. The splitter sections shall be dimensioned to run full depth, along the length of the casing, but shall not protrude beyond the casing flanges.

4.

HIGH VELOCITY ATTENUATOR CONSTRUCTION

4.1

Construction details shall be as above except that the longitudinal joints shall be lock formed and mastic filled and the casing shall be turned back 12.5mm over the face of each flange. Gaps in the corner of the 'turn over' shall be filled with arc weld and "Galvafroid" or equivalent.

4.2

End flanges shall be manufactured from 5mm thick rolled steel angle galvanised after manufacture. These high velocity attenuators shall be suitable for pressures up to 2500 Pa.

5.

EXTERNALLY LOCATED ATTENUATOR CONSTRUCTION

5.1

Construction details shall be in accordance with Section 3.0 above except, that the casing will be fabricated from carbon steel plate with a minimum thickness of 4.0mm.

5.2

The splitter sections shall be secured between steel angle spot welded to the casing.

5.3

Both ends of the attenuators shall be fitted with 50 x 50 x 5mm angle flanges pre-drilled for direct fitting to the ductwork.

5.4

All external and internal surfaces of the attenuators shall be protected in accordance with PTS "Protective Coatings and Lining", PTS 30.48.00.31-P.

6.

ACOUSTIC INFILL

6.1

Incorporated within the splitter frames shall be acoustic media consisting of semi-rigid glass fibre slabs, on to which is bonded a woven glass fibre mesh facing.

6.2

This material shall be inert, non hygroscopic, vermin proof, rot proof, will not support bacteriological growth, and shall have a Class 1 rating for surface spread of flame to BS 476 Part 7.

6.3

This material shall be guaranteed against surface erosion up to air velocities of 30.48 m/s 3 (6000ft/min), and have a density of 32 Kg/m .

7.

ACCEPTABLE NOISE LEVEL

7.1

The induct attenuators shall be sized such that the noise level at the terminal unit is 3dBA lower than room noise level. The tables below lists acceptable room noise levels.

7.2

Noise Levels for Utility/Production Decks Work area Workshops General Stores Cotrol Rooms Offices Laboratories Radio/Communication Rooms

7.3

Noise Limit dBA 70 70 60 60 55 45

Noise Levels for Accommodation Modules Sleeping/Recreation Areas Washing Facilities Changing Rooms Toilets Kitchen/Galleys Dining Rooms Recreation Rooms Theatre/Meeting Rooms Television/Video Rooms Sleeping Areas Medical Rooms Quiet Rooms

Noise Limit dBA 60 60 60 60 55 50 45 40 40 40 40

Noise levels in corridors shall not be more than 5dBA greater than the noise limits in adjoining rooms with a maximum level of 60dBA in any corridor. 8.

GENERAL REQUIREMENTS

8.1

All materials used for construction shall be non-corrosive, non-combustible, and smokeless.

8.2

The sealing strip shall be as: EPDM closed cell sponge, flame retardant D1056438/FZ-RA26 from Rubber Astic Ltd., Old Park, Wednesbury, West Midlands or equal and approved.

8.3

The attenuators shall be suitable for use in the position and application detailed on the ductwork layout drawings.

8.4

Each attenuator shall be provided with bosses at each end for bending so as to prevent static electricity.

8.5

For details of attenuators refer to induct sound attenuator schedule.

8.6

All attenuators shall be tested in accordance with B.S. 4718.

9.

VENDORS GUARANTEE

9.1

The Seller for the HVAC induct Sound Attenuators shall be responsible for all HVAC induct noise, and maintaining the HVAC noise levels stated in Section 7.0 above. The Seller shall also submit any calculations used for the development of the HVAC induct Sound Attenuator package.

9.2

Any additional attenuation deemed necessary by the Seller (e.g. cross-talk attenuators) other than the primary attenuators shown on the induct sound attenuators schedule will be subject to approval by the Buyer.

1.

TECHNICAL EQUIPMENT SPECIFICATION II-9 TECHNICAL EQUIPMENT SPECIFICATION FOR AIR HANDLING UNITS IN SAFE AND HAZARDOUS AREAS

INDEX 1.

SCOPE

2.

AIR HANDLING UNIT GENERAL REQUIREMENTS

3.

AIR HANDLING UNIT CASING

4.

MIXING BOX SECTION

5.

FILTER SECTION

6.

FAN SECTION

7.

ELECTRIC HEATER BATTERY SECTION

8.

COOLING COIL SECTION

9.

SILENCER SECTION

1.

SCOPE This specification defines the design and fabrication of Air Handling Units for safe and hazardous area on offshore platforms.

2.

AIR HANDLING UNIT GENERAL REQUIREMENTS

2.1

Design duties, size and relevant details of the air handling unit components shall be as specified in PTS schedules of heater batteries, filter, supply fans, silencers and cooling coils, any combination of these sections may make up an air handling unit.

2.2

The air handling unit may be of the horizontal or vertical draw through or blow through types, and shall comprise of any number of the following sections:a) b) c) d) e) f)

Air handling unit casing Mixing box section Filter section (salt separator & secondary filters) Fan section (centrifugal & mixed flow) Cooling coil section (DX & chilled water) Silencer section

2.3

All items of plant shall be provided with bosses for bonding so as to eliminate static electricity.

2.4

All materials used by the Manufacturer for the air handling unit and its components shall be non corrosive, non-combustible and smokeless.

3.

AIR HANDLING UNIT CASING

3.1

The air handling unit casing shall consist of 316 stainless steel pentapost frames welded to form the complete framework of the unit. The pentapost sections shall be folded from a minimum of 2mm thick stainless steel sheet, strengthen as necessary to prevent distortion when lifted completely assembled and to be free from drumming when plant is operating.

3.2

The air handling unit shall be provided with removable lifting eves. which will not deform when lifting. The design of the air handling unit shall be such that roller or skid placement of the unit will not deform the casing. The lifting eyes will comply with BS 4278.

3.3

The welded framework shall have removable single or double skinned 10 SWG thick stainless steel panels. The panels shall be held in position by means of nuts, bolts, lockwashers or approved quick release fastenings. The maintenance access panels/doors shall have door handles and locking mechanism.

3.4

The casing shall be arranged to take the required combination of air treatment sections. Each section shall be guided into the unit by suitably treated linings to the guide rails for ease of replacement and maintenance of each section.

3.5

All casing penetrations for pipework shall be provided with suitable seals to maintain the air tightness of the unit and consideration shall be given to the pressure differentials set up by the unit when in operation.

3.6

All casing penetrations for cable shall be fitted with suitable cable glands/transits to maintain the air tightness of the unit and consideration shall be given to the pressure differentials set up by the unit when in operation.

3.7

All moving parts shall. be mounted within the casing in such a way as to isolate mechanical noise and vibrations from the platform structure and adjoining ductwork.

3.8

All internal surfaces of the casing enclosure including the framework shall be thermally and acoustically insulated with semi-rigid glass fibre slabs on to which is bonded a woven glass fibre mesh facing. The insulating/acoustic material sealing strips and adhesives shall be inert, non hygroscopic, vermin proof, rot proof, will not support bacteriological growth, and will have a Class 1 rating for surface spread of flame as measured to BS 476, Part 7. The material shall be guaranteed against surface erosion up to air velocities of 3 30.48 m/s and have a density of 32 kg/m3. The air handling unit acoustics shall be tested in accordance with BS 4718.

4.

MIXING BOX SECTION The mixing box and damper section shall be manufactured as part of the air handling unit casing. However, fresh air and return air multi blade dampers of a single or opposed blade action type with continuous damper shafts run into oilite bearings shall be provided. The damper blade shafts shall extend through the mixing box section and the linkage assembly mounted on a support bracket, for attachment to a pneumatic actuator. The damper blades shall have low leakage seals fitted to blade edges. The blades shall be manufactured such that the blade seals can be replaced. The blade seal material shall be closed cell neoprene complying with the spread of flame test BS 476 Part 7 Class 1. For full details of multi blade damper construction refer to PTS 20.085 Attachment II-3 HVAC Shut Off and Pressure Control Dampers Specification

5.

FILTER SECTION

5.1

The filter section shall consist of two filter media. The first located in the fresh air inlet which will consist of a Filter Coalescer/Separator to reduce the concentration of salt laden water in the atmosphere. The second filter shall be located in the return air portion of the air handling unit to clean the return air.

5.2

Fresh Air Filter (Salt Separator)

5.2.1

The fresh air filter section shall be manufactured as a slot in section to the air handling unit casing with suitable air tight seals and locking nuts. The fresh air separator shall reduce the concentration of salt laden water aerosol to less than 0.05 ppm by weight. The filtration system shall include the necessary drains and self priming traps. The trap fitted external to the air handling unit casing shall be located in a position where the level of water can be checked and manually drained when necessary.

5.2.2

The filtration unit for the system shall be supplied with a pressure differential gauge for monitoring the condition of the filtration system. A pressure switch shall be provided to give an electrical signal to a remote control panel. The electrical controls shall have dust and damp protecting enclosures - suitable for the area the equipment is located in. For full technical specification of the filter coalescer/separator refer to PTS 20.085 Attachment II-1.

5.3

Return Air Filter

5.3.1

The filter section shall be manufactured as a slot in section to the air handling unit casing with suitable air tight seals and locking nuts. The filter media shall be of the permanent washable type arranged in a single or vee bank. The filter media shall have an efficiency of not less than 98% based on tests specified on BS 2831. with test dust Number 2 and Sodium flame test for filters BS 3928.

5.3.2

The air velocity through the filter shall be such that the clean resistance of the filter is not exceeded and that the filter fabric is not carried over into the system, the maximum air resistance of the media is not to exceed 125 Pa. A differential pressure gauge of the inclined manometer type shall be provided for the filter section mounted onto the outside of the filter access panel.

6.

FAN SECTION

6.1

GENERAL

6.1.1

The supply fan set for the air handling unit may consist of a centrifugal forward or backward curved fan or a mixed flow type supply fan.

6.1.2

The full details of the mixed flow fan set can be found in Attachment II-2 mixed flow fan specification of PTS 20.085. The mixed flow fan set may be mounted within the air handling unit on suitable guide rails or mounted onto the outside of the casing depending upon job requirements and space limitations.

6.1.3

The centrifugal supply fan however shall be mounted within the air handling unit casing on suitable guide rails.

6.1.4

The centrifugal fan shall consist of a forward curve fan wheel or a backward inclined non overloading aerofoil fan wheel form dependent upon the total system resistance.

6.1.5

The fan shall be double inlet double width type statically and dynamically balanced and fixed by taper lock connections onto a solid fan shaft with regreasable bearings.

6.1.6

The fan and motor pulleys shall be suitable for anti-static heavy duty Vee belt drives. The motor shall be internally mounted in the air handling unit fan section casing.

6.1.7

The scroll casing shall be of air-tight construction of heavy gauge steel sheets and incorporate angle iron and other stiffening to ensure freedom from drumming. The fan will have a removable inlet to enable the impeller to be removed.

6.l.8

Fan impellers shall be manufactured from carbon steel and individually and continuously welded to the retaining ring and back plate in which is a precision machined boss to take the fan shaft and taper lock connections to secure the shaft to the impeller.

6.1.9

Fan impellers assembly shall be mounted onto the machined high tensile steel shaft between bearings. The shaft shall also be extended and keyed to take Vee-belt drive pulleys. The bearings shall be two double row spherical self-aligning grease lubricated type. The bearings shall be accessible for service without removal of rotor and be complete with leak points to avoid over greasing. Bearing life shall be in the region of 20,000 hours.

6.1.10 The impeller assembly and fan scroll casing shall be fitted with an anti-spark rubbing ring to prevent sparking in the event of the impeller blade fouling the casing. The fan impeller will be balanced to a dynamic tolerance of 2 mils. 6.1.11 The fan inlet and outlet connections will be fitted with a protective galvanised wire mesh. The mesh screen will be no greater than 6mm (1/4") mesh pitch. The fan discharge will have a fire resistance flexible connection. 6.1.12 The fan and motor assembly will be mounted on a common bed plate with anti-vibration mounting to give 95% vibration isolation. The complete fan section will be mounted in the air handling unit with suitable locking nuts and air tight seals. 6.1.13 The manufacturer shall provide certified performance curves and noise levels in accordance with BS 848 fan testing. The manufacturer shall make allowances for other components in the air handling unit when producing these curves. 6.1.14 The induct fan sound power spectrum for octave bands 63Hz to 8 KHz shall be given for the equipment. 6.2

ELECTRIC MOTOR DETAILS

6.2.1

All motors shall be suitable for direct on line starting and shall comply with the requirements as specified within PTS.33.66.05.31 Electric motors Three-phase, Cage induction type.

7.

ELECTRIC HEATER BATTERY SECTION

7.1

The electric heater battery section shall be used when only one area is to be supplied by the air handling unit.

7.2

The heater battery section shall be manufactured as a slot in section to the air handling unit casing with suitable air tight seals and locking nuts.

8.

COOLING COIL SECTION

8.1

General

8.1.1

The cooling coil section shall be manufactured as a slot in section to the air handling unit casing with suitable air tight seals and locking nuts.

8.1.2

The cooling coils shall contain stainless steel moisture eliminator plates as part of the coil sections; when the face velocity over the coil is 2 m/sec. or above. Cooling coils with a face velocity below 2 m/sec. may have the moisture eliminator plates removed subject to the manufacturers recommendation for his particular equipment being met.

8.1.3

The cooling coils for the air handling unit package shall be split into two types. i)

DX (Direct Expansion) Cooling Coils

ii)

Chilled Water Cooling Coils

The controls for these coils will not be detailed in this specification. 8.2

Direct Expansion Cooling Coils

8.2.1

The direct expansion cooling coils shall be suitable for use with refrigerant R22. The coil shall consist of plate type copper fins mechanically bonded on seamless copper tubes. The tubes shall be connected to form double serpentine pipes so that inlets and outlets are positioned on t-he same side, the pipes shall be arranged in rows in a rectangular stainless steel support frame. The inlet and outlet connections shall be connected to copper distributors and copper pipe headers respectively. The coil shall also contain moisture eliminator plates manufactured from stainless steel as part of the coil section.

8.2.2

A stainless steel insulated drain pain shall be provided with the coil for the collection of air moisture condensation. The drain pan shall extend over coil, eliminator plates and coil copper pipework connections.

8.2.3

The cooling coil drain Dan insulation shall be non-combustible, smokeless, non hygroscopic, rot and vermin proof and the insulation sealants and adhesive shall comply with the spread of flame test BS 476 Part 7 Class 1. The cooling coil design face velocity and fin spacings shall be selected to meet coil duties. The design of the coil shall pay particular attention to the BS 5141 methods of testing of rating of cooling coils and BS 4856 rating of fan coil units and unit coolers.

8.2.4

The direct expansion cooling coil shall be pneumatically tested to 20 BAR and then internally cleaned by blowing through with dry nitrogen, the coil shall then be positively pressurised with a holding charge of R22 and the refrigerant connections sealed for shipment.

8.2.5

The

face

velocity

through

the

coil

shall

not

exceed

3.5

m/sec.

8.3

CHILLED WATER COOLING COILS

8.3.1

The chilled water cooling coil shall consist, of plate type copper fins mechanically bonded on seamless copper tubes. The tubes shall be connected to form double serpentine pipes so that inlets and outlets are positioned on the same side, the pipes shall be arranged in rows in a rectangular stainless steel support frame. The inlet and outlet connections shall be connected to copper distributors and copper pipe headers respectively.

8.3.2

The inlet and outlet connections shall have flanged connections to ANSI B16.5 class 150 lb raised face. For shipment, blank flanges shall be added to the inlet and outlet connections.

8.3.3

The coil shall also contain moisture eliminator plates manufactured from stainless steel as part of the coil section.

8.3.4

A stainless steel insulated drain pan shall be provided with the coil for the collection of air moisture condensation. The drain pan shall extend over coil, eliminator plates and coil copper pipework connections.

8.3.5

The cooling coil drain pan insulation shall be non-combustible, smokeless non hygroscopic, rot and vermin proof and the insulation sealants and adhesive shall comply with the spread of flame test BS 476 Part 7 Class 1. The cooling coil design face velocity and fin spacings shall be selected to meet coil duties. The design of the coil shall pay particular attention to the BS 5141 methods of testing for rating of cooling coils and BS 4856 rating of fan coil units and unit coolers.

8.3.6

Air vent and drain plugs shall be provided at the highest and lowest points on the cooling coil.

8.3.7

The face velocity through the coil shall not exceed 3.5 m/sec.

8.3.8

The coil shall be pneumatically tested to 2,000 kPa.

9.

SILENCER SECTION

9.1

The silencing section where required shall be manufactured as an integral part of handling unit casing. The silencing media shall be in accordance with the Induct Attenuators Specification of Attachment II-8 in PTS 20.085. The only exception specification being the silencer frame material shall be stainless steel to match handling unit casing.

the air Sound to this the air

TECHNICAL EQUIPMENT SPECIFICATION ATTACHMENT II-10 TECHNICAL EQUIPMENT SPECIFICATIONS FOR AIR-COOLED AIR CONDITIONING UNIT

INDEX 1.

SCOPE

2.

GENERAL REQUIREMENTS

3.

FAN COIL UNIT

4.

CONDENSING UNIT

5.

CONTROLS

6.

TESTING

1.

SCOPE This specification defines the design and fabrication for air-cooled air conditioning units for use on offshore platforms.

2.

GENERAL REQUIREMENTS

2.1

The air-conditioning unit shall contain the following:i)

A Fan Coil Unit comprising of - Direct Expansion Cooling coil. - Supply Fan Set.

ii)

A Condensing Unit comprising of - Compressor. - Condenser Coil and Fan Set.

iii)

A Control Panel

3.

FAN COIL UNIT

3.1

The fan coil unit shall be a draw-through type to assure proper air distribution over the evaporator coil surface.

3.2

The unit shall be equipped with base rails and isolators for ease of installation and to prevent any vibration being directly transmitted to the deck structure.

3.3

Housing frame shall be fabricated of welded structural steel and be painted for decorative reason as well as corrosion protection against salt-laden marine environment. The panels shall be removable from the exterior of the unit providing unlimited access to the interior of the cabinet.

3.4

All internal surfaces of the casing enclosure including the framework shall be thermally and acoustically insulated with neoprene-coated glass fibre. The insulating/acoustic materials, sealing strips and adhesives shall be inert, non-hygroscopic, vermin proof and rot proof. They shall not support bacteriological growth and shall have a Class 1 Rating for surface spread of flame as measured to BS 476 (Part 7). These materials shall be guaranteed against surface erosion up to air velocity of 30.48 m/s (6000 FPM) and have a density of 32 kg /m3 . The insulation thickness shall be a minimum 25 mm.

3.5

The unit shall be fully serviceable through hinged access door with positive closing latches.

3.6

The unit shall be provided with built-in air bypass to control the maximum relative humidity of the discharge air and limit the temperature variation of the discharge air under all operating conditions. It shall insure that the discharge air will not exceed 80% R.H. under all normal room operating conditions.

3.7

Evaporator fan shall be Double-Intake-Double Width (D.I.D.W.) forward curved centrifugal type constructed of heavy gauge galvanized steel designed for quiet operation. Wheels shall be statically and dynamically balanced and arranged on a common shaft and protected with rust inhibiting compound.

3.8

Bearings shall be of the rugged self-aligning ball bearing type with rubber innerliner permanently lubricated. A large bearing load safety factor shall be used in the selection to ensure longer life.

3.9

Driver shall be "V" belt and sized for 200% of motor nameplate horsepower. The motor sheave shall be of the variable pitch type allowing blower speed variations. The fan belts shall be fire resistant anti-static type.

3.10

The electrical motors shall be in accordance with PTS 33.66.05.31 and with the attached induction motor data sheets.

3.11

Filters shall be the washable type. The filter media shall have an efficiency of not less than 98% based on tests specified in BS 2831 with test dust number 2. The air velocity through the filter shall be such that the clean resistance of the filter is not exceeded and that the filter fabric is not carried over into the system. The maximum air resistance of the filter is not to exceed 125 pa when dirty.

3.12

A differential pressure gauge of the inclined manometer type shall be provided for the filter section mounted onto the outside of the filter access panel.

3.13

Direct Expansion Cooling coil has individual circuits for each compressor. Refrigerant flow shall be controlled by thermostatic expansion valves. The prime surface shall be seamless copper tubes with copper fins. Return bends surface shall be made of seamless copper tuber. Coils.shall be tested at 1,750 kpa (250 psig). Fins shall be copper plate type, die formed fin design to provide optimum strength and turbulence for maximum peak performance without high pressure drop.

3.14

Primary condensate drain pan shall be of the galvanised steel construction with nonferrous connections. The condensate drain line shall be internally trapped.

3.15

The Emergency Drain Pan shall be provided with a drain connection and be of all steel construction coated with rust preventive sealer. The drain pan shall cover the entire base of the unit.

4.

CONDENSING UNIT

4.1

The compressor shall be completed with service valves, resilient suspension system, 3 phase overload protection, anti-slug protection, crankcase heaters and gauge ports.

4.2

Refrigerant circuits shall be provided with combination refrigerant filter-dryer, sightglass and moisture indicator and thermal expansion valve with external equalizer. High and low pressure switches to be provided with automatic cutout in the low side and manual reset on the high side. A solenoid valve shall be included on each refrigerant circuit for pump down control.

4.3

Suction line accumulator shall be hydrogen brazed all steel construction and specially designed to prevent the trapping of refrigerant oil. The suction line accumulator shall eliminate compressor damage due to slugging of liquid refrigerant.

4.4

Head pressure controls shall be factory installed and piped to maintain a constant head pressure under all ambient conditions. A check valve shall be installed between the head pressure control valve and receiver to prevent the liquid receiver pressure from equalizing to that of the condenser. Each receiver shall have a high pressure relief valve, and inlet and outlet rotolock valve.

4.5

The unit shall be equipped with hot gas by pass for capacity control during partial load conditions.

4.6

The unit shall incorporate an integral air cooled condenser that shall be designed for year round operation. The condenser section shall include the coil assembly constructed of seamless copper tubing with copper fin. The coil shall be tested at 1750 kPa (250 psig). The blower shall be centrifugal Single- Intake-Single Width (S.I.S.W.) forward curved type or direct drive propeller type. The fan shall be statically and dynamically balanced and arranged on a common shaft which shall be protected with a rust inhibiting compound. The motor sheave shall be of the variable pitch type allowing blower speed variation. A drain pan and drain connection for the condenser section shall also be included. The condenser coil fan set and casing shall be suitable for use in an outdoor corrosive salt-laden marine environment.

5.

CONTROLS

5.1

The Electrical Control Panel shall preferably be located in a non-hazardous area connected to a lockable remote control unit suitable for Zone 2 duty installed on the condensing unit if the condensing unit is located in Zone 2 area. The panel shall be accessible for inspection without interrupting incoming unit operation. The panel shall be complete with a manual disconnecting switch, high interrupting capacity fuse, motor starters and control relays plus all branch circuiting to have 3 phase overload protection. The control voltage shall be 240VAC. All short-circuit protective devices within the control panel shall have a minimum interrupting capacity of 22 KA symmetrical at 415V. The control scheme shall include automatic restarting of the unit under the condition following unit shutdown due to platform normal A.C. power loss and the standby A.C. power restoration. The control system must include "Run-Memory" circuitry which may be powered from the supplier's 24VDC ungrounded system battery bank. The control system shall be internally mounted for automatic temperature and humidity control. A wiring diagram shall be mounted inside the electrical panel. The control panel shall have a degree of protection of at least IP 55 in accordance with IEC 144.

5.2

The electrical power supply to the Air Conditioning Unit will be 415V, 3 Phase, 50 Hz, 4 Wire System.

5.3

Temperature Control shall be by a solid state, maintenance free, temperature control system located in the return air stream of the unit. The solid state signal centre shall control the system temperature within 1.5 degrees Centigrade of the design settings. High and low humidistat should be provided for relative humidity control of plus or minus 5 percent. The panel shall also include a high return air sensor, alarms silencing switch, and a clogged filter pressure sensing switch.

5.4

Alarm system shall be provided on front of the control panel and shall consist of individual indicator lights and an audible alarm for the following malfunctions: (i)

Loss of Airflow.

(ii) Dirty Filters. (iii) Excessive Room Temperature. 5.5

In addition, a dual light shall be provided for indicating POWER to the system and system ON signifying that the unit is operational.

5.6

ON-OFF switches shall be provided to energize the system.

6.

TESTING

6.1

Shop testing shall be performed on the unit for a minimum of 3 hours prior to shipment and a record of pressures, temperatures, air capacity and electric current drawn shall be included in the packing list along with copies of certification documents.

ATTACHMENT III HVAC PREFERRED MANUFACTURERS

HVAC FILTER COALESCER/SEPARATOR TECHNICAL SPECIFICATION II-1 A. PREMABERG GB LTD. B. HOLDFIRE OFFSHORE LTD. 3 Bath Street Cheltenham England

TELEPHONE : 0242-43361 TELEX : 43583

C. OSV FABRICATIONS LTD.

MIXED FLOW FANS TECHNICAL SPECIFICATION II-2

A. AIRSCREW HOWDEN LTD. Weybridge Surrey England KT15 2QR

TELEPHONE : 0932-45511 TELEX : 929515

B. OSV FABRICATIONS LTD C. KEITH BLACKMAN LTD BRI Boughton Road Rugby Warwickshire CV21-IBU

TELEX

:

311240 KBC RYG

VAC SHUT OFF & PRESSURE CONTROL DAMPER SPECIFICATION II-3 PRESSURE RELIEF DAMPER SPECIFICATION II-4 AND WEATHER LOUVRE SPECIFICATION II-7

A. HOLDFIRE OFFSHORE LTD. 3 Bath Street Cheltenham England

TELEPHONE : 0242-43361 TELEX : 43583

B. OSV FABRICATIONS LTD C. CHANNEL-AWIRE OFFSHORE SERVICES LTD East Kilbridge Scotland. D. FLAKT LTD. AB Svenska Flaktabriken TELEX 2540 Marine Division P.O. Box 8862 S-402 72 Gothenburg Sweden

TELEPHONE : 2220-60 TELEX : 2540

HVAC PNEUMATIC FIRE DAMPER AND FIRE DAMPER CONTROL PANEL SPECIFICATION II-5 Todate only two manufacturers produce this equipment that meets certifying authority requirements. The third Company (c) may now be in a position to supply certified equipment.

A. HOLDFIRE OFFSHORE LTD. 3 Bath Street Cheltenham England

TELEPHONE : 0242-43361 TELEX : 43583

B. OSV FABRICATIONS LTD C. CHANNEL-AWIRE OFFSHORE SERVICES LTD East Kilbridge Scotland.

INDUCT SOUND ATTENUATOR SPECIFICATION II-8 A.

SOUND ATTENUATORS LTD.

B.

SARGENTS LTD.

AIR HANDLING UNIT SPECIFICATION II-9 A: HALL THERMOTANK INT. LTD. Dartford Kent England

TELEX

: 896573

B: O.S.V. FABRICATIONS LTD. C: HOLDFIRE OFFSHORE LTD. 3 Bath Street Cheltenham England

TELEPHONE : 0242-43361 TELEX : 929515

D: AIRSCREW HOWDEN LTD. Weybridge Surrey England KT15 2 QR

TELEPHONE : 0932-45511 TELEX : 929515