... , A192, DIN17175 ST37.5 ST35.8 ASTM A335 P22 alloy pipe1. ASTM A335 P22 alloy pipe 2. ASTM A213, A210-C, A179, A192 ... , WT: 1-80mm 4) heater 1 Product name ASTM A335 P22 alloy pipe heat exchanger tube2 Production StandardASTM SA213, SA335, A369, A209 ... , T11, T12, T22, T91, T92 A335: P1, P2, P5, P9, P11, P12, P21, P22, P91, P92 DIN17175: 15Mo3, 13CrMo44, 10CrMo910, 12CrMo195 BS3059 ...