Aug ust 5, 2006 G
23TMSS02R0/AAG
PAGE NO. NO. 1 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
23-TMSS-02, Rev. 0
TABLE OF CONTENTS
1.0
SCOPE
2.0
CROSS - REFERENCES
3.0
APPLICABLE CODES AND STANDARDS
4.0
DESIGN AND CONSTRUCTION REQUIREMENTS 4.1 4.2 4.3 4.4 4.5 4.6 4.7
5.0
TESTS 5.1 5.2
6.0
23TMSS02R0/AAG
General Ratings Design Criteria Materials Fabrication Installation and Removal Marking and Identification
Routine Tests Type Tests
DATA SCHEDULE
Date of Approval: August 5, 2006 G
PAGE NO. 2 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
1.0
23-TMSS-02, Rev. 0
SCOPE This Transmission Material Standard Specification (TMSS) specifies the minimum technical requirements for design, engineering, manufacture, inspection, testing and performance of outdoor/indoor duct sealing units that are intended to be used in the Transmission system of Saudi Electricity Company, Kingdom of Saudi Arabia.
2.0
CROSS-REFERENCES This Transmission Material Standard Specification shall always be read in conjunction with the Transmission General Specification No.01-TMSS-01, titled "General Requirements for All Equipment/Materials", which shall be considered as an integral part of this TMSS. This TMSS shall also be read in conjunction with SEC Purchase Order or Contract Schedules for project, as applicable.
3.0
APPLICABLE CODES AND STANDARDS The latest revision of the following Codes and Standards shall be applicable for the material covered in this TMSS. In case of conflict, the vendor/manufacturer may propose material conforming to one group of Industry Codes and Standards quoted hereunder without jeopardizing the requirements of this TMSS. 3.1
ASTM C 581
Standard Practice for Determining Chemical Resistance of Thermosetting Resins used in Glass Fiber Reinforced Structures Intended for Liquid Service.
3.2
ASTM D 297
Standard Methods for Rubber Products Chemical Analysis.
3.3
ASTM D 395
Standard Test Methods for Rubber Property - Compression Set.
3.4
ASTM D 412
Standard Test Methods for Rubber Properties in Tension.
3.5
ASTM D 471
Standard Test Method for Rubber Property - Effect of Liquids.
3.6
ASTM D 573
Standard Test Method for Rubber - Deterioration in Air Oven.
3.7
ASTM D 618
Standard Methods of Conditioning Plastics and Electrical Insulating Materials for Testing.
3.8
ASTM D 638
Standard Test Method for Tensile Properties of Plastics.
3.9.
ASTM D 790
Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
23TMSS02R0/AAG
Date of Approval: August 5, 2006 G
PAGE NO. 3 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.0
23-TMSS-02, Rev. 0
3.10
ASTM D 2240
Standard Test Method for Rubber Property-Durometer Hardness
3.11
ASTM D 2583
Standard Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impresser
3.12
ASTM D 2584
Standard Test Method for Ignition Loss of Cured Reinforced Resins
3.13
ASTM F 477
Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe
3.14
ASTM F 593
Standard Specification for Stainless Steel Bolts, Hex Cap Screws and Studs
3.15
ASTM F 594
Standard Specification for Stainless Steel Nuts
3.16
BS 903
Methods of Testing Vulcanized Rubber Part A1, A2, A4, A6, A16, A19, A26, A36
3.17
BS 2494
British Standard Specification for Elastomeric Joint Rings for Pipework and Pipelines
3.18
SAS 14/1396H
Pipes for Potable Water of Unplasticized Plastic
DESIGN AND CONSTRUCTION REQUIREMENTS 4.1
23TMSS02R0/AAG
General 4.1.1
The duct sealing units shall be of the manufacturer's standard design and shall meet or exceed the requirements of this Specification in all respects.
4.1.2
As required in the material description, the duct sealing units shall be either solid duct sealing units, hereinafter referred to as empty duct sealing units, or split or segmental contour duct sealing units, hereinafter referred to as cable duct sealing units.
4.1.3
Empty duct sealing units will be used for sealing unoccupied ducts. Cable duct sealing units will be used to seal occupied ducts.
4.1.4
The duct sealing units shall be the elastomeric (rubber) expansion type.
4.1.5
Empty duct sealing units shall consist of one sealing part. Cable duct sealing units may consist of one, two or more sealing parts, depending upon the application.
4.1.6
The duct sealing units shall be resistant to saline water, chemical agents and traces of petroleum products. Date of Approval: August 5, 2006 G
PAGE NO. 4 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.2
23-TMSS-02, Rev. 0
4.1.7
The surface condition of ducts or openings may vary from smooth, as PVC pipe, to a coarse surface such as concrete or other similar surfaces.
4.1.8
Shapes of the openings may vary from a perfect circle to slightly irregular.
Ratings The specific requirements for the duct sealing units shall be as specified in Data Schedule.
4.3
4.4
Design Criteria 4.3.1
The cable conductor operating temperature is designed to be 90°C and the jacket temperature will be approximately 82°C. Empty duct sealing units shall be designed for service conditions as specified in 01-TMSS-01. Cable duct sealing units shall be designed for 82°C expected cable jacket temperature, in addition to service conditions specified in 01-TMSS-01.
4.3.2
The duct sealing units shall be designed and constructed to maintain sealing efficiency for a period of 20 years under a constant pressure of 69 kPa (10 psig, 7.05 m of water head) under service conditions.
4.3.3
The duct sealing units will normally be installed in ducts as detailed in the Data Schedule.
Materials 4.4.1
23TMSS02R0/AAG
Sealing Materials a.
The sealing material used shall consist of a solid cylindrical core or segmental contour sections of high grade rubber compound with a basic polymer of first grade natural rubber or synthetic rubber. The rubber compound shall contain no rubber substitutes, reclaimed rubber or deleterious substances.
b.
The solid cylindrical core or segmental contour sections are to have flat end surfaces and holes for through bolts. The through bolt holes shall be such that no voids exists within the core/sections once the through bolts/compression plates are installed. Also, the holes shall be such that once the through bolts/compression plates are installed, a good seal shall be created along that part of the through bolt(s) which passes through the core/sections (i.e. good seal along the bolt(s) from compression plate inner surface to compression plate inner surface).
Date of Approval: August 5, 2006 G
PAGE NO. 5 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.4.2
23TMSS02R0/AAG
23-TMSS-02, Rev. 0
c.
The sealing material shall be soft and pliant with the ability to adjust while compressed to form a liquid and gas-tight seal with various types, shapes and sizes of duct and cable surfaces. The Shore-A hardness shall be 45 +3.
d.
The sealing material shall be smooth and free from air marks and surface defects. Cable holes surfaces shall also be smooth and free from sharp cuts and abrasions. Drilled holes shall not be permitted as they tend to rupture the unit when under compression and the properties of the unit along the holes will be inferior to the parent unit.
e.
The material forming the expansion portion of the duct sealing units shall be homogenous and free from porosity and grit and shall be judged visually on the surface of any cut sections of the test samples.
f.
Flash and mould marks shall be reduced to a reasonable minimum. Hardware and metal components shall not bear any marks or surface defects other than welding marks.
g.
Natural Rubber (NR) is generally preferred for the sealing material but if the site conditions are not conducive to natural rubber (presence of petroleum/exposure to direct sunlight) suitable elastomers like EPDM, neoprene, nitrile or styrene butadiene rubber (SBR) should be used.
h.
The rubber compound shall meet the physical requirements as indicated in Section 5.0 (Tests) when tested in accordance with the test methods and conditions indicated therein.
Characteristics of Sealing Material a.
The sealing material shall have the inherent ability to absorb transient shocks and accommodate movement due to thermal cycling (expansion and/or contraction), or compression of ducts, conduits, pipes or cables, caused by faults on cables, water hammer or demand change. The sealing capability shall not be lost during or after any of the above events.
b.
The duct sealing units shall be designed such that seal pressure will be exerted along the entire length of the unit. Also, the duct sealing units shall be designed such that sealing pressure will be exerted on the entire length of that part of the through bolt(s) which passes through the core.
c.
The density of the sealing material shall provide satisfactory heat transfer characteristics so that hot spot problems will not be encountered.
Date of Approval: August 5, 2006 G
PAGE NO. 6 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.4.3
4.5
4.6
Hardware a.
All metal used in the manufacture of the duct sealing units, including bolts, nuts and washers, shall be AISI Type Number 316L. If no welding is involved in the manufacturing process, Type 316 stainless steel is acceptable.
b.
Compression plates shall be manufactured from fiberglass reinforced polyester resin or stainless steel. Selection of the compression plate material shall be at the option of the manufacturer and shall be dependent upon the application and design of the duct sealing units. Selection of one material over the other shall not affect the overall quality and performance of the duct sealing units.
c.
As the compression plates are subjected to continuous pressure and compression, the material shall have sufficient strength to withstand the required conditions. The material shall be free of shrinkage. Compression resin plates shall not show any cracks during use.
Fabrication 4.5.1
Elastomeric components shall be produced by the compression moulding method. For cable duct sealing units, cable holes shall be provided during the moulding process only. This is to assure the precise dimensions of units and cable holes essential for proper sealing performance. Holes made by any other method may eventually leak or damage the unit while under compression and will not be acceptable.
4.5.2
For compression plates manufactured from fiberglass reinforced polyester resin, holes to accommodate the through bolts and bolt heads shall be constructed during the moulding process only.
4.5.3
The through-bolts shall extend a minimum of 20 mm beyond the compression plates (uncompressed assembly) to facilitate installation of washers and nuts.
Installation and Removal 4.6.1
23TMSS02R0/AAG
23-TMSS-02, Rev. 0
The duct sealing units shall be designed and manufactured for easy installation and removal with standard tools and without causing damage to either the duct sealing units or the ducts, conduits, pipes, cables or openings or components within such openings. A lubricant such as silicone soap may be used for installation or reinstallation if required.
Date of Approval: August 5, 2006 G
PAGE NO. 7 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.7
4.6.2
Excess mechanical force, open flames or other similar procedures are not acceptable and shall not be required for either installation or removal of the duct sealing units.
4.6.3
The duct sealing units shall be reusable after removal. Reinstallation shall be possible with standard tools and without causing damage to either the duct sealing units or the ducts, conduits, pipes, cables or openings or components within such openings. The use of solvents (except for cleaning the duct sealing units or the interior surfaces of the openings) shall not be required for reinstallation.
4.6.4
Manufacturer's recommended installation torque shall be provided by Vendor in Data Schedule and in the Installation Instruction which shall be provided in each duct sealing unit package. The torque information in the Installation Instructions shall cover all possible variations in the internal diameter of the conduit.
Marking and Identification 4.7.1
The duct sealing units shall be permanently and legibly marked with the following information in such a manner as not to interfere with their normal function : a. b. c. d. e. f. g. h. i.
4.7.2
5.0
23-TMSS-02, Rev. 0
Manufacturer's name Country of manufacture Date of manufacture Manufacturer's catalog or part number Nominal size (diameter) of unit Number of cables (if a cable unit) Cable diameter (if a cable unit) Type of elastomer (NR, EPDM, neoprene, nitrile or SBR) "See installation instruction for applicable torque"
All markings shall be in the English language.
TESTS All test results shall be provided for review and acceptance by SEC 5.1
Type (Design) Tests All type (design) tests specified below shall be performed on the representative unit or on the first unit of every new design or rating to be supplied to SEC.
23TMSS02R0/AAG
ITEM
PROPERTY
UNIT
1.
Tensile strength,. Min. MPa
VALUES
9
Date of Approval: August 5, 2006 G
TEST METHOD
BS903:A2, ASTMD412
PAGE NO. 8 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
ITEM
PROPERTY
UNIT
2.
Elongation at break, min.
3.
VALUES
TEST METHOD
375
BS 903 : A2, ASTM D 412
Hardness (Microtest) IHRD
45 +3
BS 903 : A26, ASTM D 2240
4.
Compression set, max., 23°C, 70 h
%
12
BS 903 : A6 , ASTM D 395
5.
Compression set, max., 70°C, 22 h
%
20
BS 903 : A6
6.
Water absorption, % swell, max.,70°C, 168 h
7.
Specific gravity
8.
Accelerated ageing, 70°C, 168 h a.
-
8
0.95 - 1.45
BS 903 : A16 Volumetric Method, ASTM D 297 BS 903 : A19 Method A or B
20
BS 903 : A2 ASTM D 573
b. Elongation at break % max. change of original.
30
BS 903 : A2
c. Hardness (microtest) max. change
IHRD
5
BS 903 : A26 ASTM D 2240
kPa
69
At Manufacturer recommended installation torque for 4h
9.
Tensile strength, max. change of original
%
23-TMSS-02, Rev. 0
Pressure Test
%
In lieu of the actual type (design) tests, certified test reports of type (design) tests performed on an identical unit may be submitted to SEC for review and approval during bidding stage. 5.2
Routine Tests 5.2.1
All duct sealing components/units shall be routine tested as follows : a. Routine test shall be carried out on all 100 units of the first batch production for each SEC stock number. b. Visual quality examination shall be carried out on 100% of all units.
23TMSS02R0/AAG
Date of Approval: August 5, 2006 G
PAGE NO. 9 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
23-TMSS-02, Rev. 0
c. Dimensional check shall be carried out on 5% of all units. d. Shore hardness test shall be carried out on 100% of all units. e. Torque test outside the conduit shall be carried out on 100% of all the units with non-metallic compression plate. f.
5.2.2
23TMSS02R0/AAG
Torque test inside the conduit shall be carried out on 1% with minimum of two (2) pieces of all the units. All test data shall be supported by test standards used (if any).
Date of Approval: August 5, 2006 G
PAGE NO. 10 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
23-TMSS-02, Rev. 0
6.0 DATA SCHEDULE DUCT SEALING UNITS SEC Enquiry No.
Date:
SEC Purchase Order No. or Contract No.
Date:
SEC PTS No./Project Title with J.O. No. REFERENCE SECTION NO.
3.0
DESCRIPTION
'A'
'B'
'C'
APPLICABLE CODES AND STANDARDS *
4.0
DESIGN AND CONSTRUCTION REQUIREMENTS
4.12
Type (empty or cable) Location to be installed (underground, cable vault, etc.)
*
Inside diameter or dimensions of duct (mm) Provision of dimensional sketch for noncircular cross section
Yes/No
Precise outside diameter of cable (mm) Precise outside diameter of neutral wire (mm) 4.4.1
4.4.3
Material: Sealing
*
Compression Plate Bolt(s)
* *
'A' 'B'
- SEC SPECIFIED DATA/PARAMETERS - BIDDER/SUPPLIER/VENDOR/CONTRACTOR PROPOSED DATA/ PARAMETERS 'C' - REMARKS SUPPORTING THE PROPOSED DEVIATION IN COLUMN 'B' (*) - DATA/PARAMETER TO BE PROVIDED/PROPOSED BY THE BIDDER/SUPPLIER/ VENDOR/CONTRACTOR IN COLUMN 'B'
23TMSS02R0/AAG
Date of Approval: August 5, 2006 G
PAGE NO. 11 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
23-TMSS-02, Rev. 0
6.0 DATA SCHEDULE DUCT SEALING UNITS REFERENCE SECTION NO.
DESCRIPTION
Washers
'A'
'B'
'C'
*
Nuts 4.3.1
Maximum Operating Temperature of the Duct Sealing Unit (°C)
*
4.3.2
Maximum Operating Pressure of the Duct Sealing Unit (kPa)
*
4.6.5
Recommended nut torque for 69 kPa (10 psi) pressure (Joule or Nm)
*
Maximum Nut Torque (Joule or Nm)
23TMSS02R0/AAG
Date of Approval: August 5, 2006 G
PAGE NO. 12 OF 13
TRANSMISSION MATERIALS STANDARD SPECIFICATION
23-TMSS-02, Rev. 0
6.0 DATA SCHEDULE DUCT SEALING UNITS A.
ADDITIONAL TECHNICAL INFORMATION OR FEATURES TO BE FURNISHED BY SEC:
B.
ADDITIONAL SUPPLEMENTARY DATA OR BIDDER/VENDOR/SUPPLIER/CONTRACTOR:
C.
OTHER PARTICULARS TO BE FILLED UP BY BIDDER/VENDOR/SUPPLIER/ CONTRACTOR:
FEATURES
Actual Manufacturer of Equipment/Material
PROPOSED
BY
Vendor/Supplier/ Contractor
Name of the Company Location and address
Name and Signature of authorized epresentative and date
Official Seal/Stamp of the Company & Date
23TMSS02R0/AAG
Date of Approval: August 5, 2006 G
PAGE NO. 13 OF 13
