... ,BS3059:Part 2:1990 4.Applicant Seamless steel pipe for low and Medium pressure BoilerGrade:10,20 ... ,ASTM SA179,SA192,BS30595. ApplicantHigh pressure seamless steel tube for chemical Fertilizer EguipmentsGrade:10,20G,Q345,Q390 ... For tubed heat exchanger and similar heat conveying equipments6), ASTM A192 For manufacture wall panel,economizer,reheater,superheater and steam pipeline of boilers. seamless ...