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 The following is a sketch indicating the installation of the temporary pig traps as well as the equipment and devices for the operation of cleaning and gauging. The dimensions of the pig launcher and receiver are for 48”. air compressor control valve(throttling valve)DN114×7quick closurepressure gauge
Figure-4
The connection between the temporary pig traps and the pipeline trunk as well as the test pipes and fittings will be welded according to EWP100-P30-J00-505 Specification for Pipeline Welding .
After the installation and before the pigging operations, operators shall check that all equipments and devices are in good condition and well functional for pigging activities. 6.3 Safety and protecting measures
Protecting fences around the area near the pipeline end will be provided if necessary.
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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 Bulletin boards shall be placed beside both ends of the pipeline being tested, notifying that it is high dangerous near the pipeline end. Warning massages warning: dangerous area, keep out shall be printed in red color, and in three languages: English, Chinese and Indian. All warning notices, marker tapes, protective fences and other safety equipment shall be taken away after the completion of pigging.
During the whole pigging process, two person will be assigned to each side of the test section to keep w