... /A213: Standard Specification for Seamless Ferritic and Austenitic Alloy- Steel Boiler, Superheater Stainless Steel U-Formed Tubes:01) Commodity name: Austenitic ... bundles, then protected by seaworthy wooden case.For Heat Exchanger & Boiler Application:ASTM A249(TP304,TP304L,TP316L,TP321/H)ASTM A213 ...