1. Heat exchanger tube 2. ASTM A213, A210-C, A179, A192, DIN17175 ... OD: 6-1200mm, WT: 1-80mm 4) Use for heater 1 Product name heat exchanger tube2 Production StandardASTM SA213, SA335, A369, A209, A250 ... STBA23, STBA24, STBA25, STBA264 Outside diameter: 14mm~114.3mm 5 Wall Thickness:2mm~25mm6 Length: 6m-12m, also can be manufactured ... 5 ton12 Payment:TT or LC ASTM A213/SAME SA213 heat exchanger tube