1. ASTM A335 P22 alloy pipe 2. ASTM A213, A210-C, A179, A192, DIN17175 ST37. ... 5 ST35.8 3. OD: 6-1200mm, WT: 1-80mm 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, ...