... ,1Cr2Mo,1Cr5MoStardandGB9948-2006,JIS G3441-19887. ApplicantSeamless steel pipe for Gas CylindersGrade:34Mn2V,30CrMo,35CrMo,45.8.Application1),API SPCE 5L ... .2), API SPEC 5CT Tubing is used in extracting petroleum & natural gas. casing pipe serves as wall of well.3), ASTM A106 ... .4), ASTM A53 It is used for conveying water,petrolem,gas and other common fluids.5), ASTM A179 For tubed heat ...