1. Name: Weld Neck Flange 2. Material: The material of this flange can be made in ASTM( A105, A350-LF2, A182-F22, A182-F7, A182-F304, A182-F304L, A182-F347, A182-F316, A182-F321, A182-F321H, A182-F347H. ) , DIN, JIS 3. Standard: We can make the flange in diverse standard, including ASTM, JIS, BS, DIN, 4. Size: The outside diameter of our flange shall be fup to 5000mm 5. Pressure: The pressure of the flange can be from 75bls to 2500bls