... : ANSI,ASME,ASTM,JIS,DIN Carbon Steel Reducers1. Reducer: Eccentric and Concentric2. Standard: ANSI B16.9 / 16.28, ASTM A53/A106, API 5L, ASME ... 4. Wall Thickness: SCH20,STD,SCH40,SCH80,SCH160,XXS5. Material: ASTM A234 WPB, ST35.8, ST37, WP11, 20#, Q2356. Surface ... painting,Anti-rust varnish oil,hot galvanizing or as customer's special requirement 1/2"-72" ANSI,ASME,ASTM,JIS,DIN Carbon Steel Reducer