Analysis of service stress corrosion cracking in a natural gas transmission pipeline, active or dormant?

Wang, J and Atrens, A (2004) Analysis of service stress corrosion cracking in a natural gas transmission pipeline, active or dormant?. Engineering Failure Analysis, 11 1: 3-18.


Author Wang, J
Atrens, A
Title Analysis of service stress corrosion cracking in a natural gas transmission pipeline, active or dormant?
Journal name Engineering Failure Analysis   Check publisher's open access policy
ISSN 1350-6307
Publication date 2004
Sub-type Article (original research)
DOI 10.1016/j.engfailana1.2003.08.001
Volume 11
Issue 1
Start page 3
End page 18
Total pages 16
Editor D R H Jones
Place of publication England
Publisher Pergamon-Elsevier Science Ltd
Collection year 2004
Language eng
Subject C1
291499 Materials Engineering not elsewhere classified
671199 Transport equipment not elsewhere classified
0912 Materials Engineering
Abstract Stress corrosion cracks (SCC) had been found in a natural gas transmission pipeline during a dig-up and inspection program. The question was raised as to whether the SCC was active or dormant. This paper describes the resultant investigation to determine if a particular service crack was actively growing. The strategy adopted was to assess the appearance of the fracture surface of the service crack and to compare with expectations from laboratory specimens with active SCC. The conclusions from this study are as follows. To judge whether a crack in the service pipe is active or dormant, it is reasonable to compare the very crack tip of the service crack and a fresh crack in a laboratory sample. If the crack tip of the active laboratory sample is similar to that of the service pipe, it means the crack in the service pipe is likely to be active. From the comparison of the crack tip between the service pipe and the laboratory samples, it appears likely that the cracks in the samples extracted from service were most likely to have been active intergranular stress corrosion cracks. (C) 2003 Elsevier Ltd. All rights reserved.
Keyword Materials Science, Characterization & Testing
Stress Corrosion Cracking
Pipeline Failiure
Fractography
Simulation Tests
Crack Growth
Engineering, Mechanical
Q-Index Code C1

 
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