ASTM A249 Stainless Steel Tubes are designed for Condenser and any other Pressure and Heat-exchanger Pipes. ASTM ... about Welded Austenitic Stainless Steel BoilerSuperheater, Heat-Exchanger, and Condenser pipes/tubes.ASTM A249 standard covers nominal-wall-thickness welded ... for such use as boiler, superheater, heat exchanger, or condenser tubes.According to ASTM A249, subsequent to welding and prior ...