... of boiler, water & petroleum. 4. ASTM A53 it is used for conveying water, petroleum, gas and other common fluids. 5. ASTM A179 ... A192 For manufacture wall panel, economizer, reheated, superheated and steam pipeline of boilers. Main product : seamless steel pipe,pipe fittings, oil casing steel pipe,weld steel pipe,Rubber Lined Steel Pipe Unit ...