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Edition and Publication:
< Natural Gas and Oil > Editorial Department
Hosted by:
China Petroleum Engineering & Construction Corporation Southwest Company
Authorized by:
China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
cnpc-ngo@cnpc.com.cn
Issue:ISSN 1006-5539
CN 51-1183/TE

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Simulation of Pipeline Rupture Prevention of Gas Pipeline Block Valve

Author of the article:Lu Meitong, Luo Yexin, He Jiahuan

Author's Workplace：1.China Petroleum Pipeline Engineering Corporation;2.PetroChina Pipeline Company

Key Words：Gas transmission; Block valve; Threshold setting; Protection; Simulation

Abstract：Described are misoperation and inaction occurring in accident state of block valves in gas pipeline, introduced are threshold setting of block valves used commonly in large diameter gas pipeline and common methods for threshold setting of block valves in domestic engineering design, listed are some problems occurring frequently in practical application of block valves and analyzed are reasons for these problems. Applied is the engineering software TGNET to simulate the working condition of leakage, obtained and compared are pressure drop values and pressure drop rates of block valves respectively according to location of different leakage points and the change of pipeline throughput, proposed are the optimum method for threshold setting of block valves, further illustrated is the significance and effect of block valves for ensuring safe pipeline operation and it is concluded that threshold value of block valves shall be reasonably reduced according to pressure drop values at different locations and variable working conditions of block valves.