... ,JIS G3462-1998 DIN 17175-1979 ,BS3059:Part 2:1990 4.Applicant Seamless steel pipe for low and ... 20G,Q345,Q390,10MoVNb,12CrMo,15CrMo,12Cr2MoStardandISO 9329-2-1997,ASTM A161-946. ApplicantSeamless steel pipe ... ,water,oill in oil&gas industry.2), API SPEC 5CT Tubing is used in extracting petroleum & natural gas ... of boiler,water&petroleum.4), ASTM A53 It is used for conveying water,petrolem,gas and other ...