S.S. Bright Annealed Tube Specification:ASTM A269: Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service. ASTM A213 (ASME SA213): Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater and Heat Exchanger Tubes. The specifications of EN and DIN are available. Grade Available: TP304, TP304H, TP304L, TP316, TP316L, ...