高钢级天然气长输管道止裂控制技术现状

Current crack arrest technologies for high-grade steel long-distance gas pipeline

因高钢级(≥X90)管线钢难以依靠自身韧性止裂,同时缺乏适用于高钢级管线钢止裂器设计的相关准则,故对于向高钢级发展的国内天然气管道而言,在管道安全可靠性方面面临巨大挑战,而止裂控制问题是其中的关键。从理论研究和工程设计与应用两个方面系统梳理了天然气长输管道止裂控制技术的国内外发展历史与现状,介绍了相关计算公式和不同种类止裂器的功能原理,分析了当前止裂控制技术存在的问题与不足,指出了今后高钢级管线钢止裂控制的研究方向,对于促进高钢级天然气长输管道的发展具有指导意义。(图7,表1,参19)

It is difficult for high-grade （〉~X90） pipeline steel to arrest crack by its own toughness, and there are lack of related standards applicable to design of crack arrestor for such steel. In China, the gas pipelines which are increasingly turning to high grade steels are facing huge challenges in safety and reliability, and crack arrest is one of the key sectors. History and current situation of crack arrest technologies for long-distance gas pipelines in China and abroad are systematically coalesced in respect to theoretical study and engineering design and application. Moreover, related calculation formula and principles of crack arresters are introduced, and problems and deficiencies in current crack control technologies are analyzed. Finally, the target of research on crack arrest of high-grade pipeline steels are pointed out. The conclusions of this paper will be significant for the development of high-grade steel long-distance gas pipelines. （7 Figures, 1 Table, 19 References）