... STD,SCH40,SCH80,SCH160,XXS 4.Standard: ANSI,ASME,ASTM,JIS,DIN Carbon Steel Reducers1. Reducer: Eccentric and Concentric2. Standard: ANSI ... B16.9 / 16.28, ASTM A53/A106, API 5L, ASME B36 ... 4. Wall Thickness: SCH20,STD,SCH40,SCH80,SCH160,XXS5. Material: ASTM A234 WPB, ST35.8, ST37, WP11, 20#, Q2356. Surface treatment: black ...