... A179,ASTM A192,ASTM SA179,SA192,BS30595. ApplicantHigh pressure seamless steel tube for chemical Fertilizer EguipmentsGrade:10,20G,Q345,Q390,10MoVNb ... 9329-2-1997,ASTM A161-946. ApplicantSeamless steel pipe for Petroleum CrackingGrade:10,20,12CrMo,15CrMo,1Cr2Mo,1Cr5MoStardandGB9948-2006 ... the purpose of the pipeline project of boiler,water&petroleum.4), ASTM A53 It is used for conveying ...