... Steel Cap 2.Size: 1/2"-48" 3.Wall Thickness: SCH20,STD,SCH40,SCH80,SCH160,XXS 4.Standard: ANSI,ASME,ASTM,JIS ... DIN Carbon Steel Cap1. Standard: ANSI B16.9 / 16.28, ASTM A53/A106, API 5L, ASME B36.10M---1996, DIN2605 / 2615 ... "3. Wall Thickness: SCH20,STD,SCH40,SCH80,SCH160,XXS4. Material: ASTM A234 WPB, ST35.8, ST37, WP11, 20#, Q2355. Surface ... requirement ANSI B16.9 1/2"-48" bw Carbon Steel End Cap