DESIGN AGAINST PROPAGATING SHEAR FAILURE IN PIPELINES
Propagating shear failure can occur in gas and certain hazardous liquid transmission pipelines,potentially leading to a large long-burning fire and/or widespread pollution,depending on the transported product.Such consequences require that the design of the pipeline and specification of the steel effectively preclude the chance of propagating shear failure.Because the phenomenology of such failures is complex,design against such occurrences historically has relied on full-scale demonstration experiments coupled with empirically calibrated analytical models.However,as economic drivers have pushed toward larger diameter higher pressure pipelines made of tough higher-strength grades,the design basis to ensure arrest has been severely compromised.Accordingly,for applications where the design basis becomes less certain,as has occurred increasing as steel grade and toughness has increased,it has become necessary to place greater reliance on the use and role of full-scale testing.This paper explores the factors controlling design to avoid propagating shear failure,to identify critical gaps in the understanding and analyses used in design.It then considers these aspects with a focus on the significance of design factor and grade.Finally,this paper considers the implications of steel chemistry and processing to achieve higher grades – which as the window on production controls closes can necessitate a more comprehensive full-scale testing program to confirm arrestability under typical production conditions.
B.N.Leis J Malcolm Gray
Consultant Inc,Worthington OH Microalloyed Steel Institute,Houston TX,United States
国际会议
Energy Materials 2014(第一届能源材料国际会议)
西安
英文
81-99
2014-11-04（万方平台首次上网日期，不代表论文的发表时间）