Pressure rating: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500 Standards: ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48, API 605 and so on Dimensions: Weld Neck Flange: 3/8"¡«160" (DN10¡«DN4000) Slip on weld flange: 3/8"¡«40" (DN10¡«DN1000) Plate Weld Flange: 3/8"¡«100" (DN10¡«DN2500) Materials:CS Standard: ASTM / ASME A/SA 105 / 350 LF 2 and so on SS Standards: ASTM / ASME A/SA 182 and so on AS Standard: ASTM / ASME A/SA 182 ASTM A182 F1, F11, F12, F22, F5, F9, F91 and so on