036-NITROGEN PURGING PROCEDURE.pdf

Pearl GTL Project

LINDE ENGINEERING

Shell Project No: HP-3000-QAT Contractor Project No: 5887

Project Document Number: T- 4.250.929 Project Rev.: B Page 2 of 9

Purchase Order Number:

2MH127

Tag/Item Number(s): N/A

Unit(s): ASU

PCWBS: Z

QATAR SHELL GTL PROJECT (PEARL) C2 AIR SEPARATION UNITS CONSTRUCTION

F B 09.10.08 Company Comments Incorporated SK EO AG CCI

E B 17.09.08 Issued For Review SK EO AG IFR

D A 24.04.08 Ready for Construction BR UA ZG RFC

C O 05.12..07 Issued for Company comments BR AU/MC ZG ICC

B 27.11.07 Issued for Review BR AU/MC ZG IFR

A 22.11.07 Issued for Internal Review BR AU/MC ZG IIR

GAMA Rev.

Project Rev

Date Description Prepared

By Checked

By

Approved By

Status

No. No. ORIGINATOR

LINDE ENGINEERING AG

Document Title:

PROCEDURE FOR EQUIPMENT NITROGEN PURGING

Contractor

Gama Qatar Co. W. L. L.

Document No. LOC470

GAM PRO QAC GTL 036 F

Org.

Code

Doc.

Type

Disc. Code

Geogr. Area

Seq.

No

Rev. No

Vendor Code

Project Document Number: T-4.250.929

Rev No: B

Doc. Title : PROCEDURE FOR EQUIPMENT NITROGEN PURGING

Doc No : GAM-PRO-QAC-GTL-036 Rev. F DATE: 09.10.08

T-4.250.929 REV-F

Page 4 of 9

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TABLE OF CONTENTS

1. SCOPE ________________________________________________________________________ 5

2. PURPOSE _____________________________________________________________________ 5

3. HSSE _________________________________________________________________________ 5

4. REFERENCE __________________________________________________________________ 5

5. DEFINITIONS _________________________________________________________________ 6

6. RESPONSIBILITIES ____________________________________________________________ 6

7. GENERAL _____________________________________________________________________ 7

8. SAFETY REQUIREMENTS _______________________________________________________ 7

9. PROCEDURE __________________________________________________________________ 7

10. QUALITY ASSURANCE ________________________________________________________ 8

11. ATTACHMENTS ______________________________________________________________ 8



T-4.250.929 REV-F

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1. SCOPE

This procedure applies to the Preservation by Nitrogen purging of equipments to be installed in C2 ASU PEARL GTL PROJECT by Gama Qatar

2. PURPOSE

The main purpose of this procedure is to describe the minimum requirements applicable to the Preservation of equipments by Nitrogen purging and to determine the preservation activities in compliance with the contract and manufacturer/Vendor requirements.

3. HSSE

All works shall be in compliance with the State of Qatar laws and regulations, Ras Laffan Industrial City and International standards, codes, LINDE ENGINEERING AG and QSGTL and/or its PMC requirements and instructions. In addition all employees and GAMA subcontractor employees on site will have through LINDE ENGINEERING AG Site Safety Induction and GAMA Qatar Safety induction for site safety, health, environmental and security prior to work activities. Other training courses will be attended as required by LINDE ENGINEERING AG or QSGTL and/or its PMC as required.

4. REFERENCE

DEP 31.29.00.10 Installation of Rotating Equipment

DEP 70.08.10.11 Equipment & Tools for Maintenance (Mechanical

Maintenance Equipment, Tools and Bolt Tensioning)

DEP 70.10.70.11 the preservation of Old and New Equipment and Pipe

Standing Idle

T-4.250.927 Material Handling and Storage

T-4.250.932 Preservation of Equipment

T-4.234.542 Project Quality Plan



T-4.250.929 REV-F

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5. DEFINITIONS

Company : QSGTL/or its PMC

Contractor : LINDE ENGINEERING AG Sub Contractor : GAMA QATAR Contract : QSGTL Pearl Plant - C2 ASU Project QCR : Quality Control Record QCP : Quality Control Procedure QCE : Quality Control Engineer QCI : Quality Control Inspector QA/QC : Quality Assurance / Quality Control TPI : Third Party Inspection

6. RESPONSIBILITIES

1. GAMA Construction Manager or his designee shall be responsible to eliminate

the leaks and to restore the pressure at the value of minimum 0.2 barg in accordance with this procedure and Contractors dispositions

2. GAMA QA/QC Mechanical Superintendent shall be responsible, to ensure a check of the nitrogen pressure, damages to the valves, gauges and the external surface protection is conducted once a week

3. HSSE Engineer- shall be responsible for monitoring safety performance & where necessary Initiating corrective action through line management.



T-4.250.929 REV-F

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7. GENERAL

Source of Nitrogen. 1. Nitrogen which is shipped with equipment. 2. Nitrogen should be pure (99.9 % of purity) NB: Nitrogen purging requirements are in accordance with Manufacturers instructions

8. SAFETY REQUIREMENTS

Nitrogen cylinders shall be secured to a wall or post so they will not tip over or fall. Gas regulators and cylinder must be checked for damaged threads, dirt, dust, oil or grease. Dust and dirt must be removed with a clean cloth, while regulators/cylinder with damage thread replaced.

9. PROCEDURE

Upon receipt from Contractor the Quality Control Inspector shall check the equipment for nitrogen purging requirement and prepare the Nitrogen purging report (Attachment ). the pressure gauges shall be properly protected The shell side and tube side of the equipment shall be filled with nitrogen at

high purity grade (99.9) and pressurized at a 0.2 barg or as specified by manufacturer / Vendor.

The equipment shall be protected to avoid damage to the valves, gauges, etc. as specified by the equipment Manufacturer.

The nitrogen pressure shall be checked once a month and pressure of shell side shall be recorded on the report.

In case of pressure loss the nitrogen pressure shall be restored using the nitrogen bottle attached to the equipment.



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If any leaks are found, the inspector shall inform the supervisor / Contractor to take corrective action and shall investigate cause of leaks. The pressure restored immediately.

The leaks shall be eliminated in accordance with the disposition of Contractor and the pressure restored with nitrogen at the value of a minimum 0.2 barg and as specified by manufacturer / Vendor.

If a small drop in nitrogen pressure is noticed, connect the nitrogen hose and the equipment, open nitrogen regulator and pressure up the equipment as per the vendor instruction manual.

If a complete drop in pressure is noticed, then prior to re-pressurising with nitrogen, all air in the equipment shall be removed by flushing the equipment with nitrogen. This is achieved by introducing nitrogen through the inlet valve while keeping the outlet valve open to allow the escape of air from the equipment. This shall continue until all entrapped air is removed, and verified by measuring the oxygen content of escaping gas. Such incident shall be informed to Contractor prior to depressurising the equipment.

10. QUALITY ASSURANCE

A Quality Assurance System shall be operated conforming to related standards. Controls and checks shall be established and documented.

11. ATTACHMENTS

GAM-QCR-QAC-GTL-069

PROJECT: C2 ASU PEARL GTL PROJECT, RAS LAFFAN INDUSTRIAL CITY

EQUIP. TAG.NO.: DESCRIPTION: LOCATION:

MANUFACTURER: DRG.NO.: RFI NO:

MONTH

1 2

3 4 5 6

7

8

9

10

11

12

ACTIVITY Month

Date Checked

Check all internal and accessories storage is acceptable

Visual Check : Is there any damage

Check for protective covers on all the openings

Check all warning labels, like N2 warning plate are existent

Check Purge Pressure level

If Re-purge is required, indicate pressure level

GAMA SIGN WITH DATE

LINDE SIGN WITH DATE

QSGTL or its PMC

GAM-QCR-QAC-GTL-069

STORAGE, PRESERVATION AND NITROGEN PURGING REPORT

FORM NO:

SHT:

036-NITROGEN PURGING PROCEDURE.pdf

Documents

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