... COMPETITIVE PRICE EXCELLENT QUALIT 1. outside diameter: 75mm-2265mm2. thickness: 12mm-120mm3. standards: ANSI, DIN, JIS, BS, ISO, GB/T, JB ... etc.5. certificate: ISO9001:2000 , ASME and Boiler A-level6. material: ASTM A 234 WPB,ASTM A 234WP1,WP5,WP9,WP11 ...