split flange halves J518/ISO 6162 Pressure: 3000 PSI and 6000 PSI flange clamp About flange clamps, clamps are used for providing the holding power to the 4-bolt flange connection. We could offer in split and captive versions. Flange clamps are forged for higher strength and durability. They meet all requirements of J518. The split clamps make it easy to assembly the connection in close quarters. All the pressure indications are based on a working temperature from 20 to 90