2-MS. Cleaning and Flushing of Pipework

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Masar-MIDMasar -MID-Al-Fayhaa Al-Fayhaa// JV3

‫ء‬‫يح‬‫ا‬‫ا‬ Boulevard Project / Abdali

‫د‬ ‫عبد‬‫ا‬ / ‫ر‬ ‫ر‬‫ي‬ ‫ي‬‫ب‬ ‫ب‬‫ا‬ ‫وو‬‫ش‬

Abdali - Boulevard

TITLE OF METHOD STATEMENT : Cleaning, Flushing and Chemical Ref: MS - C10 No 8 Rev 0 Treatment of Hydronic Systems Pipe work

Section No.

Contents

01

Scope of Work

02

Responsibility

03

Description of Works

04

Labour, Manpower and Plant Requirement

05

Supervision Arrangements

06

Temporary Works To Be Designed And Installed

07

Health and Safety Requirements

08

Attachments

Phone : - (962) 6 5653407 Fax : - (962) 6 5653489 E-mail :- mmf.jv3@g mmf.jv3@gmail mail . com

Masar-MID-Al-Fayhaa/ JV3

-‫الوسط‬-‫ر‬‫م‬‫ف ا‬‫ائت‬

‫ء‬‫يح‬‫ا‬ Boulevard Project / Abdali

‫عبد‬‫ا‬ / ‫ر‬‫ي‬‫ب‬‫ا‬ ‫و‬‫ش‬

Abdali - Boulevard


1.0. SCOPE OF WORK This method statement covers the detailed procedure for flushing and cleaning of hydronic systems pipe work. This procedure defines the method to be used to ensure that the flushing and cleaning of the pipe work used in the hydronic systems, has been carried out as per the contract specification requirements.

2.0 RESPONSIBILITY 2.1

The Construction manager is responsible over all for the implementation of the method statement, to ensure that the team of engineers and foremen and operatives are aware of this method statement and, to ensure that all resources (labour, material and equipment) are available to carry out the work as planned.

2.2

The Senior Representatives of the service providers (Third Party Commissioning Organization and Water Treatment Specialist ) are responsible for carrying out the work as per the approved method statement. They are also responsible for ensuring that adequate equipment for mobilization works is in place prior to the starting of work.

2.3

The QA/QC Engineer is responsible for ensuring that the operations have been performed as per the specification, for ensuring that the inspections are done as per Quality Control Procedure and that the Inspections, and the works are offered for approval to the Employer's Commissioning Authority Representative (CxA) and the Engineer as specified.

2.4

The Safety Engineer is responsible for ensuring that all safety precautions are in place, and that all personnel onsite are using the prescribed Personal Protective Equipment (helmet, gloves, safety shoes, coveralls, eye protection etc.). The Safety Engineer must also ensure that all relevant permissions are available for the works.

2.5

With reference to specification sections 01815-1.7.E and 01815-3.3.G the CxA shall review and comment on the plan for carrying out the works covered by this method statement including the testing witnessing and

Phone : - (962) 6 5653407 Fax : - (962) 6 5653489 E-mail :- mmf.jv3@gmail . com

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‫عبد‬‫ا‬ / ‫ر‬‫ي‬‫ب‬‫ا‬ ‫و‬‫ش‬

Abdali - Boulevard


and corresponding chemical quantity to be used. 3.3.5

It is envisaged that the major handling and application of chemicals will take place in and adjacent to the ETS room at P1 Level. Care shall be taken to protect adjacent works from accidental chemical spillage by covering by polythene/plastic sheets

3.3.6

On receipt of the material at site store, the same shall be inspected by the Store Keeper / Site Engineer / QA/QC Engineer, to ensure the materials are delivered, in a good condition and without damage, and are as per the approved material submittal.

3.3.7

Inspection request (MIR) shall be raised for Engineer’s approval, before transferring the materials to site for application.

3.3.8

The Site Engineer shall ensure that all necessary access panels have been provided to enable re-circulating points, valves and strainers to be reached during the progress of the works. This requirement applies for example, to the access panel adjacent to each apartment fan coil unit, and the re-circulating points at the ends of heating and chilled water mains in apartment corridors.

3.3.9

The Site Engineer shall ensure that there are no obstructions to the performance of the cleaning and flushing operations in the work area.

3.3.10

The Site Engineer shall ensure that all tools and equipment are available as per the scheduled tasks, and that they are suitable for their intended purpose, and comply with relevant contract requirements.

3.4 3.4.1

Checks to be carried out prior to filling. Ensure that all equipment is installed in accordance with the

manufacturers instructions


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Abdali - Boulevard


3.4.14

Ensure that there is an adequate and permanent supply of

electrical power for operation of associated pumps.

3.5 FLUSHING AND CLEANING 3.2.1 The systems will be cleaned in accordance with the following stages: •

Static flushing.

•

Dynamic flushing.

•

Removal of surface oxides.

•

Final flushing.

•

Dosing with corrosion inhibitor and biocide.

3.2.2

Commence with the Static Flushing, in a TOP to BOTTOM sequence by first filling the entire system with fresh water, ensuring that all air is removed from the pipes, and leaving charged for 48 hours, to soften any inclusions. Subsequently release the water to drain, based on a predetermined schedule to be agreed with all parties, observing the degree of contaminants and discoloration of the water during the process. Typically this will be carried out for each building in alphabetical sequence i.e. A1, A2, A3, A4, B1, B2 etc.

3.2.3

Clean all dirt pockets and strainers, and after replacing, refill and drain the system until the water being released to drain is relatively clean. This could involve filling and draining the complete systems at least two more times or as directed by the CxA.

3.2.4

Re-fill the entire systems in readiness to commence Dynamic Flushing.

3.2.5

Install temporary flushing tank, flushing pump and drain valve as


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Abdali - Boulevard


3.2.18

Fresh cleaning agent (NCE-1as per the attached data sheet) will be introduced to the systems under the direction of the water treatment supervisor, and circulated for 12 to 16 hours. This stage of the procedure is intended to remove oil, grease, rust and suspended material from the service equipment.

3.2.19 Flush the system with fresh water to remove any residue of the cleaning agent NCE-1, and dissolved materials. 3.2.20

Introduce the cleaning and passivating product (NCE-6 as per the attached data sheet), to neutralize the system and to passivate the internal surfaces of the pipes. This stage will take between 4 and 6 hours.

3.2.21

On completion of the passivation stage the system will be flushed once more with clean water to remove all remaining traces of chemical cleaning agents, and then completely refilled using fresh softened water.

3.2.22

The final stage in the process is the adding of corrosion inhibitors and biocides, and at this point the temporary flushing loops should be removed or isolated so that the FCU's, AHUs heat exchangers and system pumps are included in the system.

3.2.23

Following the complete filling of the heating and cooling systems with softened water, the final stage of the process will be commenced, and which entails dosing with Biocides and Corrosion Inhibitor. In the case of the chilled water system dosing will be with Bionetro 1020 and Biocide 190, and for the heating system Oxyscan 5020 will be used. For the volumes required, and the target water parameters refer


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‫عبد‬‫ا‬ / ‫ر‬‫ي‬‫ب‬‫ا‬ ‫و‬‫ش‬

Abdali - Boulevard


Material Requirement 1)

NCE-1 High active multi component cleaner (exact dosage to be

determined by water treatment Supervisor). 2)

NCE-6 General purpose de-greasing and passivation product

(exact dosage to be determined by water treatment supervisor).

5.

3)

1175 litres Bionetro 1020.

4)

125 litres Biocide 190.

5)

325 litres Oxyscan 5020

SUPERVISION ARRANGEMENTS

The supervision of these works will be under the direct control of the Construction Manager, assisted by the Sector Engineer, Site Engineers and Foremen with the back – up from the Technical Department. All Subcontractor works will be coordinated and controlled by the Construction Manager. A full time competent Subcontractor Project Supervisor shall be deployed to the site.

6. TEMPORARY WORKS TO BE DESIGNED INSTALLED

&

Temporary pumps and tanks will be installed and maintained in compliance with required safety standards . See attachment f).

7.

HEALTH AND SAFETY REQUIREMENTS Phone : - (962) 6 5653407 Fax : - (962) 6 5653489 E-mail :- mmf.jv3@gmail . com


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Abdali - Boulevard



2-MS. Cleaning and Flushing of Pipework

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