Size : 12"NB TO 4"NB IN Class : 3000 LBS, 6000 LBS, 9000 LBS Type : Socket Weld (SW) & SCREWED (SCRD) – NPT, BSP, BSPT MATERIALS : Stainless Steel Forged Union : SS Forged Union ASTM A182 F304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L Duplex Steel Forged Union : ASTM ASME ASA 182 UNS F 44, F 45, F51, F 53, F 55, F 60, F 61. Alloy Steel Forged Union : AS Forged Union ASTM ASME ASA 182 F1F5F9F11F22F91 Carbon Steel Forged Union : CS Forged Union ASTMA 105A694 Gr. F42465256606570