1.pipe line 2.Mainly export to Southeast Asia,Africa,Mid East,Eastern ... SA179,SA192,BS30595. ApplicantHigh pressure seamless steel tube for chemical Fertilizer EguipmentsGrade:10,20G,Q345,Q390,10MoVNb,12CrMo,15CrMo,12Cr2MoStardandISO 9329 ... ,economizer,reheater,superheater and steam pipeline of boilers. seamless pipe line