MS for Deflection Test-Rev.03

8/20/2019 MS for Deflection Test-Rev.03

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P u b l i c W o r k s A u t h o r i t y

D R A I N A G E A F F A I R S

DOHA W EST SEWAGE TREATMENT WO RKS

EXTENSION 05

CONSULTANT

egis

CONTRACTOR

Suez Environment- Marubeni JV


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DOHA WEST SEWAGE TREATMENT WORKS EXT#5

METHOD STATEMENT FOR THE DEFLECTION TESTOF GRP PIPE LINES

Doc No: AT-SUEZ-MS-0022/15

Rev. 02

Page 2 / 7 Date: 29/11/2015

TABLE OF CONTENTS

1. SCOPE

2. PURPOSE

3. APPLICABLE CODES, STANDARDS AND SPECIFICATIONS

3.1 Standards, Specificatin and Prced!res

4. DEFINITIONS AND ABBRE"IATIONS

4.1 Definitins

4.2 A##re$iatins

5. E%UIP&ENT TO BE USED

5.1 Si'p(e &(d

5 2 &an!a( &icr'eter


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Rev. 02

Page 3 / 7 Date: 29/11/2015

1. SCOPE

This procedure describes the general requirements and procedure for vertical Deflection Testing to therequirements of Flowtite GRP pipes and QCS 2010 standards. This procedure covers the requirement ofdeflection test above DN 700 pipe lines after assembled and installed.

2. PURPOSE

The purpose of this procedure is to familiarize all relevant personnel with the requirements for deflection testingof piping systems by Asiatech and its subcontractors if any.

3. APPLICABLE CODES, STANDARDS AND SPECIFICATION

3.1 Standards, Specification & Procedures

The latest issue of each of the following codes and standards shall be applied. The revisions to be used

shall be those in effect at the time of the purchase order is issued:

QCS2010 Qatar construction Standards 2010ASME B 31.3 Process PipingFabrication and Installation Procedure (Method Statement) for GRP Piping


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Rev. 02

Page 4 / 7 Date: 29/11/2015

5. EQUIPMENT TO BE USED

5.1 Si'p(e &(d

The equipment could be a simple cylinder shape mold having the calibrated OD with two hooks at both sides for

pulling and holding inside the pipeline.

Another option could be by using two steel bars (vertical and horizontal) with wheels fixed on a small truly shape

equipped also with two hooks for pulling and holding inside the pipeline (Refer below sketch).


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Rev. 02

Page 5 / 7 Date: 29/11/2015

The calibrated OD of the equipment = 590-1.5*590/100 = 590-8.85 = 581.15 + 0.5 mm.

7. RESPONSBILITIES

Piping Engineer shall be responsible for the preparation and performance of the test described in thisprocedure.

Q/C Engineer shall review the system completion package to ensure that all the pre-test requirements havebeen met as per this procedure.

Q/C Engineer shall submit an inspection notification to the client for review and approval of deflection test andfor approval.

8. DEFLECTION TEST PROCEDURES

8.1*enera( Re+!ire'ents steps t #e f((-ed

Deflection test generally applicable only for the underground backfilled pipes and pipe lines (Refer line

list DGT-X-LT-000-801)

Proper back filling and compaction is required to do the deflection test. And this test will be usefulmeans of checking that the installation requirement have been met and should be completed as soon

ibl ft th i t ll ti i fi i h d


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Rev. 02

Page 6 / 7 Date: 29/11/2015

One operator will pull the rope from other end of the pipeline continuously until it reaches to that end.

If there is more bends on the pipeline, deflection can be checked by using item# 5.2 micrometer, whereone technician can enter inside the pipe and check the ID at different locations and record thereadings.(Confined space trained person only can enter inside the pipe.)

Segment 4 is not possible to be checked by any methods it requires to split the pipeline in to two ormore segments to be one of the 5 segment types, since the chance for access an operator isimpossible.

9. &ETOD FOR DEFLECTION CALCULATION/

% Deflection =

Actual I.D. =

Actual I.D. will be determinedbefore the line to be bacfilled, free from external constraint. Only socket coupling

installation is allowed.

Actual Vertical I.D – Installed Vertical I.D.

Actual I.D

X 100

Vertical I.D + Horizontal I.D.

2

X 100


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Rev. 02

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11. SAFETY PRECAUTIONS

11.1 Warning signs shall be posted at appropriates locations for the duration of the tests.

11.2 Only authorized personnel shall be permitted to enter inside the pipe line to be deflection tested.

11.3 All necessary measures shall be taken to that all personnel are adequately protected during the course of

the test and no work shall be on the sections of the line for the duration of the tests. Care must be taken

when the persons enter inside the pipe due to the likely risk of contaminants, and gas etc...

This must be carefully selected and agreed with site HSE so as not to affect the personal and the otherwork areas.


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RISK ASSESSMENT

Risk Assessment Area Risk Assess ment DOC NO: RA-AT-SUEZ-020

Occupational Health &safety S DEFLECTION TEST Contract No. DW5-001-2015Environment E Date: 21/12/2015

Quality Q

SlNo

Description of Act ivi ty

Hazard Potential andConsequences

P C RiskL/M/H

Precautionary Measures and Safeguardsto control the risk

P C RiskL/M/H

1. SitePreparation

Personal Injury/ SeriousInjury / Property Damageand Heat Stress thepersonals

3 2 Med Before Star the work conduct the Tool box TalkMeeting

Ensure First Aid kit should be available alwaysduring the work period.

Ensure emergency contact numbers should be

displayed Ensure all personals to be instructed as to the

symptoms of Heat Stress and how to deal withsuspected cases.

Access should check before enter inside thechamber

Work area must be clean from all obstructions Area should be barricade Check the work permit

3 1 Low

2. Enterinside the Pipe

(ConfinedSpace entry)

3 4 High Ensure a valid permit to work Check the gas level to ensure no toxic gas

presence in the pipe. Provide duct type exhaust fan. Ensure, no personnel should enter the pipe the

oxygen level is low. Proper access to be provided Only trained (Confined space entry) personnel

shall enter inside the pipe. Attendant shall be present all the time at the

entrance Ensure continuous monitoring of gas level and

it’s to be recorded.

3 1 Low


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3. Climate(WeatherCondition)

Property Damage / PersonalInjury

3 2 Med Ensure Weather condition poor we should planbefore starting the job

In case rain / sand storm will comes we shouldproper cover the any electrical, Electronicequipment and stop the all cranes the windpressure above 30 km/h.

Ensure while raining time work will stop.

3 1 Lo

4. Bolt Nut Fixing Falling Hazards/ PersonalInjury/

3 2 Med Ensure bolt nuts tighten only Calibrated Torqueranch

Ensure correct size nut bolts can use. Ensure worn appropriate PPEs

3 1 Lo

5. Use of PPE Personal Injury 3 3 Med Ensure that all persons using proper PPE suchas Safety helmet, goggles, hand gloves, safetyshoes,

Personnel should wear necessary safetyprotective Equipment during work and it shouldbe related that particular activity.

3 1 Lo

Prepared By : EMMANUEL-HSE SUPERVISOR

Checked By : BIJU PONNAN-WORK SUPERVISOR

Approved By : NIDHIN THAMPY-SITE MANAGER

Signature :

Signature :

Signature :

Date : _____21/12/2015______________

Date : ____ 21/12/2015_______________

Date : ____21/12/2015_____________

LOW = GREEN P = Probability

MED = ORANGE C = Consequence

HIGH = RED R = Risk Level

Documents

MS for Deflection Test-Rev.03