Changes proposed for determining line pipe wall thickness

Pipeline operating companies' safety records and published results of experimental and analytical studies indicate that the present traditional design formulation for determining required line pipe wall thickness is conservative. This has become an important issue with oil and gas transportation companies.It is possible to modify this conservative bias that would allow the reduction of pipeline wall thickness without compromising the integrity of new pipelines.The existing method of calculating the required wall thickness or allowable pressure as presented in ASME Code B31.8 is based upon the allowable hoop stress. Code B31.8, Paragraph 805.234, states that "the maximum allowable hoop...

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