... Products and Specifications at CHAOWEI:Pipe, Tube - BS3074NA13 (Tube), ASTM B 163 (Condenser and Heat Exchanger Tube), ASTM B 165 (Seamless pipe and ... Tube), ASTM B 725 (Welded Pipe), ASTM B 730 (Welded Tube), ASTM ... Pipe), ASTM B 829 (Seamless Pipe and Tube), ASME SB 163 (Condenser and Heat Exchanger Tubes),ASME SB 165 (Seamless Pipe ...