An engineering approach has been developed for assessing the fitness-for-service (FFS) of pipelines that operate in environments where they are subject to stress-corrosion cracking (SCC). This approach employs J-integral fracture mechanics to quantify the growth of SCC flaws and assess the potential for fracture-toughness failure. An effective flaw area model is used to assess the potential for flow-strength failure. This paper reviews the development of the FFS approach, describes recent improvements to it, and discusses its validation by comparison with the results of laboratory testing and field experience. Procedures for estimating fracture toughness and predicting pipeline fracture are presented. Available data on SCC growth rates are reviewed, and their use in the prediction of remaining safe operating life is discussed. Two examples are presented to illustrate the application of the FFS approach.
Fitness-for-service assessment for pipelines subject to stress-corrosion cracking
Corrosion Prevention and Control ; 47 , 1 ; 15-24
2000
10 Seiten, 30 Quellen
Article (Journal)
English
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