Ensuring industrial safety of pipelines with developed hard sections

Oil refining and petrochemicals have a wide demand for pipelines from heat resistant chromium steels. One of the main reasons for frequent failures of more stressed joints may be the presence of wide solid and brittle layers having significant areas in metal volume with maximum clusters of imperfect...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-05, Vol.862 (3), p.32014, Article 032014
Main Authors: Zharinova, N V, Vakulenko, M V
Format: Article
Language:English
Subjects:
Chromium steels
Deformation
Heat resistant steels
Heat treatment
High temperature
Industrial safety
Petroleum pipelines
Petroleum refining
Pipelines
Structural members
Welded joints
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Summary:Oil refining and petrochemicals have a wide demand for pipelines from heat resistant chromium steels. One of the main reasons for frequent failures of more stressed joints may be the presence of wide solid and brittle layers having significant areas in metal volume with maximum clusters of imperfections of metal structure and creating excessive concentration of additional residual deformations and stresses in welded joints, which are most saturated with defects inherent in welded joints. Presence of such extended sections leads to reduction of process strength of welded joints, increases tendency to formation of cold cracks and sharply limits time of laying of thick-walled welded joints of pipelines before subsequent high-temperature thermal treatment. The work carried out studies on welding pipe blanks in order to compare different methods of 5CroMo16 steel treatment during welding and determine the most efficient mode. Regularities of stressed state of different-module structural elements with wide solid layers are established.
ISSN:1757-8981
1757-899X
1757-899X
DOI:10.1088/1757-899X/862/3/032014