... A312, A312MASME SA312 / SA312MOD: 1/4"~20"WT: SCH5S~SCH80STP304, TP304L, TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, TP317, TP317L, TP321, ... A269ASME SA269OD: 6.0~50.8mmWT: 0.8~10.0mmTP304, TP304L, TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, TP317, TP317L, TP321 ... Heater and Heat-Exchanger TubesASTM A213 / A213MASME SA213 / SA213MOD: 6.0~50.8mmWT: 0.8~10.0mmTP304, TP304L, TP304H, TP310, TP310S, ...