高钢级钢管和高压输送:我国油气输送管道的重大技术进步

High grade line pipe and high pressure transportation:significant progress of oil & gas transportation pipeline technology in China

近年来,我国管道企业和相关科研院所联合攻关,取得了一批关键技术成果,这些成果包括:研制了X70,X80钢级高性能管线钢及焊管、管件;突破国际上螺旋缝埋弧焊管的使用禁区,确立了具有中国特色的"大口径高压输送主干线螺旋埋弧焊管与直缝埋弧焊管联合使用"的技术路线;在国内首次研究了高压输气管道动态断裂与止裂问题,采用Battelle双曲线模型预测了西气东输和西气东输二线等管道延性断裂的止裂韧性;在国内首次研究了油气管道基于应变的设计方法,解决了该设计方法及抗大变形管线钢管在强震区和活动断层管段应用的技术难题;解决了高强度焊管的腐蚀控制和应变时效控制等技术。

In recent years,companies and institutes in China conducted co-research projects and achieved many important improvements.These improvements include： development of X70 and X80 grade pipeline steel,welded pipe,and fitting,breakthrough of the application limit of helical submerge-arc welded pipe,establishment of the technical route for alternative application of helical and longitudinal submerge-arc welded pipe with high-strength and large-diameter in main pipeline,first investigation of dynamic fracture and crack arrest in China,which adopts the Battelle Two Curve method to predict the toughness requirement for the 1st and the 2nd West-east Gas Pipelines,investigation of strain-based design for oil gas pipeline,which solves problems of the methodology and high strain pipe application in seismic and active faults areas,investigations to control the corrosion and strain aging of high strength pipe,and so on.