... Standard Specification for Seamless Ferritic and Austenitic Alloy- Steel Boiler, Superheater Stainless Steel U-Formed Tubes:01) Commodity name ... : Austenitic Stainless Steel U-Formed Pipes & Tubes02) Process method: Cold drawn/cold pilgered03) Material: TP304, TP304L, TP316, ... protected by seaworthy wooden case.For Heat Exchanger & Boiler Application:ASTM A249(TP304,TP304L,TP316L,TP321/H)ASTM ...