Allied Fittings 160-040-000 - 4" Raised Face Flange with Socket Weld Fitting Connection Type and 2854" Raised Face Flange with Socket Weld Fitting Connection Type and 285 psi Max. Pressure Suitable for use in chemical refineries, fertilizer and petrochemical plants, and in gas, oil, and water transmission systems. Also suitable for use in LNG plants, nuclear power plants, and in thermal power stations. Socket Weld Raise Face, Carbn Stl, 285 psi PFS1311416