... Steel Pipes, Tubes and Tubings are designed for Boiler and any other Pressure and Heat Pipes. ASTM A249 ... steels, with various grades intended for such use as boiler, superheater, heat exchanger, or condenser tubes.According to ... .03% Carbon)And so on. The original materials import form India, Korea and Taiwan, Such as YUSCO, BNG, POSCO ... Welded Stainless Steel Pipes, Tubes and Tubings for Boiler