Stainless Steel SS tube ASME TP316 316L OD 4.00MM to 500mm High/Low pressure Specification: ASME TP316 316L: Standard Specification for Seamless Ferritic and Austenitic Alloy- Steel Boiler, Superheater and Stainless Steel Heat Exchanger Tubes. ASTM A249 / A249M:Standard Specification for Welded ...