036-NITROGEN PURGING PROCEDURE.pdf
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Transcript of 036-NITROGEN PURGING PROCEDURE.pdf
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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
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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
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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
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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 5 of 9
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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
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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 6 of 9
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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.
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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 7 of 9
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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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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 8 of 9
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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
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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: