Stress corrosion crack identification with direct assessment method in pipeline downstream from a compressor station
Publish place: The 15th National Conference on Welding and Inspection and the Fourth National Conference on Non-Destructive Testing
Publish Year: 1393
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
INCWI15_003
تاریخ نمایه سازی: 30 بهمن 1398
Abstract:
Stress Corrosion Crack (SCC) in pipeline is a type of environmentally assisted cracking (EAC), since its discovery in 1965 as a possible cause of failure in pipeline, SCC has caused, on average, one of two failures per year in the U.S, According to the NACE SCC DA a pipe line segment is considered susceptible to SCC if all of the following factors are met: The operating stress exceeds 60% of specified minimum yield strength (SMYS), the operating temperature exceeds 38°C, the segment is less than 32 km downstreamfrom a compressor station, the age of the pipeline is greater than 10 years and the coating type is other than Fusion Bonded Epoxy(FBE). In this paper as a practical experience in NISOC, Direct Assessment (DA) Method is used for identification SCC defect in unpiggable pipeline located downstream of compressor station
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Authors
H Gholami
Department of Manufacturing, Dezful Branch, Islamic Azad university, Dezful, Iran
M Jalali Azizpour
Department of Manufacturing, Dezful Branch, Islamic Azad university, Dezful, Iran