S.S Heat Exchanger Tube A/SA213/A249 / A249M Specification:ASME SA213/A213: ... Ferritic and Austenitic Alloy-Steel Boiler, Superheater and Stainless Steel Heat Exchanger Tubes. ASTM A249 / A249M:Standard Specification for Welded Austenitic ... Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes. the equivalent specifications of EN, DIN , ...