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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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Research on the Method of Strength Evaluation of Gas Gathering Pipeline Insulation Joint

Author of the article:Chen Junwen, Zhang Qian, Shen Guiyu, Zeng Yang, Ren Qirui, Chen Qing

Author's Workplace：1.China Petroleum Engineering Co., Ltd. Southwest Company; 2.Manager Department of Pipeline Construction Project, PetroChina Company Limited

Key Words：Insulation joint; Gas gathering system; Strength check; Design bending moment

Abstract：Insulation joint is the key component in cathodic protection system, and its reliability and safety development goes deeper. Due to the high temperature and high pressure in gas gathering system, the insulation joint will bear the bend moment arising from the internal pressure and thermal expansion, and the joint is likely to leak because of its structural feature. Hence, it is necessary to study the allowable tolerable bending moment of the insulation joint with working conditions taken into account, and then form a strength evaluation method. In the paper, based on the code requirement, the allowable tolerable bending moment equation of the insulation joint is derived with the pipeline strength theory, and then the method for strength checking of insulation joint and the method for design bending moment selection are presented. The study result in this paper will provide reference for safe engineering and strength check of insulation joint.