Information Release: Draft Criteria for Evaluation of Wrinkle Bends in Hazardous Liquid Pipelines
For small ripples (i.e., incipient buckles or wrinkles) which exhibit no cracks, no repair is required if the crest-to-trough height, h, meets one of the following criteria where the maximum operating hoop stress, S, is as shown. The absence of any cracks shall be confirmed using magnetic...