A new joint industry project addressing the integrity management of SCC in gas transmission pipelines

摘要

IN 2006 a group of natural gas transmission pipeline operating companies in North America collaborated in a Joint Industry Project (JEP) to address the Integrity Management of SCC in High Consequence Areas. The outcome of the work was a series of reports examining the occurrence of SCC extending over 40 years up to 2005, and developing experience-based guidance for conducting hydrostatic testing and excavations, for assessing the severity of discovered cracks and for establishing the interval before the next assessment. The outcome was published in ASME STP-PT-011 (2008) and provided the basis for proposed revisions to ASME B31.8S. It also enabled the closer alignment of ASME B31.8S with the revisions to the CEPA Recommended practice for SCC.