| 2021 №03 (03) |
DOI of Article 10.37434/as2021.03.04 |
2021 №03 (05) |
Avtomaticheskaya Svarka (Automatic Welding), #3, 2021, pp. 23-28
Peculiariyies of emergency destruction of the technological pipeline
M.D. Rabkina, V.А. Kostin, T.G. Solomiychuk
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
Analysis of failure of process pipeline, including a study of the properties, chemical composition and structure of the metal of welded joints, as well as the site of fracture and nature of crack propagation, made it possible to establish the most probable causes that led to its premature failure. It is assumed that such reasons are: a defect in a longitudinal weld; residual stresses in the pipe resulting from local heat treatment of the assembly circular weld; as well as longitudinal stresses arising from deflection of the pipeline between the supports. Ref. 9, Tabl. 4, Fig. 7.
Keywords: technological pipeline; longitudinal and circular welded joints; defects in welded joints; lacks-of-fusion; structural heterogeneity; lamellar tearing; destruction
Received: 01.02.2021
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