In collaboration with Shell Global Solutions and BP Arnoco, BG Technology carried out a research programme on the evaluation of prototype grade X100 line pipes for potential applications to future high-pressure gas transmission pipelines. As part of this collaborative programme, a study on the failure behaviour of X100 line pipes has been completed. The study combined material characterisation and experimental testing (both pipe ring expansion testing and full-scale pipe burst testing), The experimental tests involved pipe rings containing simulated metal loss defects, notch defects and part-wall fatigue cracks. The study focused on the macro-structural behaviour of damaged pipe walls. Defects in the parent metal, weld metal and seam weld heat affected zone (HAZ) were tested to failure. The tests showed a feature of ductile fracture failure and the test results demonstrated toughness-independent failure behaviour, indicating sufficiently high toughness levels in these materials. This paper describes this study and highlights the major findings from this work.
Failure behaviour of ultra high strength line pipe
Fehlerverhalten einer Rohrleitung aus ultrahochfestem Stahl
2000
11 Seiten, 9 Bilder, 6 Quellen
Aufsatz (Konferenz)
Englisch
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