Procedure for Cleaning,Flushing,Gauging and Hydro Testing of Pipelines

East-west Gas Pipeline Project Construction Procedure for Cleaning, Gauging And Hydro testing of Pipelines Rev.: A1 China Petroleum Pipeline Bureau（CPP） Document No.: EWPL00-COS-PR-0014

Procedure for Cleaning, Gauging And Hydro testing of Pipelines

Contract No.: Document No.:

ISSUED FOR A1 2006-6-17 REVIEW REV DATE DESCRIPTION PREPARED BY Du Zhongyuan Zeng Li Jianhui Zhaocheng REVIEWED BY CHECKED BY APPROVED BY Page 1 of 56

East-west Gas Pipeline Project Construction Procedure for Cleaning, Gauging And Hydro testing of Pipelines Rev.: A1 China Petroleum Pipeline Bureau（CPP） Document No.: EWPL00-COS-PR-0014 Contents

1.0 Project Description………………………………………………………………………3 2.0 Reference Documents…………………………………………………………………….4 3.0 Resource planning……………………………………………………………………….4 4.0 Safety and Environment…………………………………………………………………10 5.0 Construction Flow Chart and schedule…………………………………………………..12 6.0 Pipeline Section Cleaning and Gauging……………………………………………………13 7.0 Pipeline Section Hydrostatic Test…………………………………………………………..24 8.0 Termination…………………………………………………………………………………….39 9.0 Test Report………………………………………………………………………………………40 10.0 Quality Control………………………………………………………………………………….41

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1.1 General East-west Gas Pipeline Project Construction Procedure for Cleaning, Gauging And Hydro testing of Pipelines Rev.: A1 China Petroleum Pipeline Bureau（CPP） Document No.: EWPL00-COS-PR-0014 1.0 PROJECT DESCRIPTION： East-West Gas Pipeline (EWPL) project comprise of 48?? dia, 1386km long mainline, dispatch compressor station, intermediate compressor stations, mainline valve stations and tap-off station. EWPL originates at Onshore Gas Processing Terminal (OGPT) of Reliance Industries Limited located at Gadimoga, south of Kakinada in state of Andhra Pradesh. Pipeline from OGPT traverses through the state of Andhra Pradesh, Karnataka, Maharashatra and Gujarat and terminates near Bharuch in the state of Gujarat.

The Contractor shall ensure that the complete pipeline section undergoing cleaning, gauging, filling and hydrostatic test after mechanically complete in all respects i.e. wielding complete and confirmed by Engineer-in-Charge and the pipeline is laid and backfilled . The length of the sections basically will be the distance between two line valve stations or a line valve station and the nearby pig trap station. The maximum length of each test section shall not exceed 50 km. Cleaning, Gauging, Filling, hydrostatic test will be carried out section by section from Kakinada to Bharuch. After of the hydrostatic test, contractor shall depressurize of the tested pipeline.

1.2 Pipeline Design Parameter

Length： 1386 Km

Steel Grade： API 5L Grade X70 Diameter: 48” Wall thickness： 17. 2mm； 20.7mm； 25.4mm； Design pressure： 98 bar

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2.1 Specifications： East-west Gas Pipeline Project Construction Procedure for Cleaning, Gauging And Hydro testing of Pipelines Rev.: A1 China Petroleum Pipeline Bureau（CPP） Document No.: EWPL00-COS-PR-0014 2.0 REFERENCE DOCUMENTS Following Company specifications shall form integral part of this specification and shall be complied with when applicable to the Works covered in the Contract.

① EWP100-P30-J00-509 Specification for Flushing, Gauging and Hydro testing ② EWP100-P30-J00-505 Specification for Pipeline Welding ③ EWP100-P30-J00-506 Specification for Construction of Pipeline

④EWP100-P30-J00-515 Specification for Dewatering and pre-commissioning 2.2 codes and standards：

The latest edition of following Codes and Standards are referenced in this specification and all provisions of these

reference codes and standards shall be applicable.

① OISD 141 Design and Construction Requirements for Cross Country Hydrocarbon Pipelines ② ASME B31.8 Gas Transmission and Distribution piping Systems ③ ASME Sec VII Div 2 Boilers and Pressure Vessels Code

3.0 RESOURCE PLANNING

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