Research and Application of Abroad High Grade Pipeline Steel

According to investigation reports and technology intercourse with abroad petroleum company and steel company,combining with the information of IPC2002 meeting recently held in Canada and Pipe Dreamer meeting held in Yokohama,it briefly introduced the abroad development and present problems of steel grade X80,X100,X120.Furthermore it also briefly introduced the practicality quality of imported X70 longitudinal seam welded pipe,hot-rolled coil and hot-rolled plate for reference of domestic pipeline steel company and related research and design units.