Specifying fracture toughness ranks high in line pipe selection

John F. Kiefner, Willard A. Maxey Kiefner & Associates Worthington, Ohio Selecting line pipe with adequate fracture toughness is an important consideration for all types of line pipe including ERW, seamless, and DSAW pipe. The selection process requires a knowledge of the characteristics of fracture behavior which relate to toughness, the levels required for various line pipe applications, the factors which influence toughness, the means available in API Specifications 5L to achieve adequate toughness, and some ways in which a pipeline operator can obtain pipe with adequate toughness for various applications. Those using this information include pipeline d...

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