1.pipe line 2.Mainly export to Southeast Asia,Africa,Mid East, ... ,1Cr5MoStardandGB9948-2006,JIS G3441-19887. ApplicantSeamless steel pipe for Gas CylindersGrade:34Mn2V,30CrMo,35CrMo,45.8.Application1),API SPCE 5L ... API SPEC 5CT Tubing is used in extracting petroleum & natural gas. casing pipe serves as wall of well.3), ASTM A106 ... ,reheater,superheater and steam pipeline of boilers. seamless pipe line