Current challenges related to high strength pipeline steels
Recent pipelines have utilized API Grade X-70 or X-80 for onshore installations and typically heavy wall API X-65 0ffshore for deep water offshore pipelines.However several new projects require capacity to transport larger volumes of gas,and higher strength grades such as API X-80 or X-100 are being considered,as well as very heavy wall thicknesses and high design factors,such as 0.80 SMYS.Apart from the challenge to manufacture such pipe with appropriate DWTT properties,concerns are arising related to fracture control,weldability,strain tolerance,and property changes during coating,caused by the large plastic strains encountered during pipe making.Established data bases for the aforementioned properties are sparse,particularly full scale ductile fracture arrest results.The current state-of-the-art is summarized and suggestions presented for future research.
fracture control weldability strain based design
J M Gray
Microalloyed Steel Institute,LP,Houston,Texas,USA
国内会议
上海
英文
1-8
2013-06-01（万方平台首次上网日期，不代表论文的发表时间）