1. Size: 1/2"-72" 2. Wall Thickness: SCH20,STD,SCH40,SCH80,SCH160,XXS 3. 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 / 2616, JIS P2311/23122. Size: 1/2"-72"3. Wall Thickness: SCH20,STD,SCH40,SCH80,SCH160,XXS4. Material: ASTM A234 WPB, ST35.8, ST37, WP11, 20#, Q2355. Surface treatment: black painting, ...