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Pipeline Integrity Management Under Geohazard Conditions (PIMG)

By
Mamdouh M. Salama
Mamdouh M. Salama
ConocoPhillips
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Yong-Yi Wang
Yong-Yi Wang
CRES
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Don West
Don West
Golder
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Alexander McKenzie-Johnson
Alexander McKenzie-Johnson
Geosyntec
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Azam B A-Rahman
Azam B A-Rahman
Petronas
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Guiyi Wu
Guiyi Wu
TWI
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Jens Petter Tronskar
Jens Petter Tronskar
DNVGL
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Jim Hart
Jim Hart
SSD Inc
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Bernt J. Leira
Bernt J. Leira
NTNU
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ISBN:
9780791861998
No. of Pages:
412
Publisher:
ASME Press
Publication date:
2020

ABSTRACT

Strain based design concept have been extensively used for pipelines experience expectable plastic strain for both installation and service, meanwhile most transmission pipelines are designed by hoop stress induced by internal pressure, and maximum longitudinal stress which is typically limited by 90% specific minimum yield strength of pipe. However, some stress-based designed pipelines have experienced unforeseen plastic strain in past decade that resulted in failure. Strain criteria including the strain demand from ground movement and strain capacity of the girth weld are often used in strain based design. In the paper, the failure causes of rupture of a girth weld of 32 inches API 5L X80 SAWH gas pipeline are present for demonstration of the failure analysis.

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