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- Title
Analysis of the Causes of Failure of a Pipeline Welded Joint.
- Authors
Chirkov, Yu.; Kushnarenko, V.; Repyakh, V.; Chirkov, E.
- Abstract
An annular welded joint of a pipeline from steel 17G1S with diameter 1020 mm transporting natural gas at a pressure of 5.5 MPa is studied. The residual welding stresses are determined after failure of the pipes. Results of a study of fracture surfaces and of a metallographic analysis of the region of the welding defect over which the fracture has developed are presented. Mechanical tests of the pipe metal and of the metal of the welded joint are performed. The causes of failure of the joint are considered and methods for raising the reliability of pipelines are recommended.
- Subjects
WELDED joint fatigue; PIPE welding; PRESSURE measurement; STRUCTURAL failures; RELIABILITY in engineering
- Publication
Metal Science & Heat Treatment, 2018, Vol 59, Issue 9/10, p669
- ISSN
0026-0673
- Publication type
Article
- DOI
10.1007/s11041-018-0209-2