A new high-strength steel with a specified minimum yield strength of 120 ksi has been developed for line pipe applications (Oil & Gas Journal, December, 1rd, 2003, page 56). Because existing specifications were not originally intended for X-120 and no service experience exists for this grade, full-size pipe tests and finite-elemente analyses were conducted to evaluate structural performance. This article presents results of burst and fracture-arrest studies and analysis that demonstrate suffcient pressure-containment capacity. For crack arrest, full-size tests evaluated the intrinsic arrestability of the material and the effectiveness of crack arrestors. Although the X-120 pipe did not have sufficient toughness for intrinsic arrest for the conditions tested, tight-fitting sleeve crack arrestors proved effective in stopping propagating fractures.
Full-scale burst, crack-arrest testing vets X-120 line pipe
Berstversuche und Tests zum Stoppen von Rissen an X-120 Rohren
Oil and Gas Journal ; 102 , 8 ; 54-59
2004
6 Seiten, 5 Bilder, 5 Tabellen, 17 Quellen
Aufsatz (Zeitschrift)
Englisch
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