Hammer unions are perfect pipe connectors for standard and sour-gas service, hammer unions are forged from high quality alloy steel and heat-treated for controlled harden. All materials meet ASTM and AISI standards. Each hammer union is carefully inspected to ensure long, dependable service. Hammer unions are available in sizes 2", 3" and 4", and in working pressures from 2,000 psi to 15,000 psi, three-lug nuts and Acme threads of hammer union ensure a safe and efficient way to quickly connect and disconnect API threaded pipe connections with only a hammer. Hammer unions for sour gas service are manufactured in accordance to Standard MR-01-75 of the National Association of Corrosion Engineers and API Spec 16C. Marks in three-lug nuts and colors of hammer union help to identify different pressure ratings. All hammer union parts of the same figure number, size and pressure rating are interchangeable, end connections of hammer unions are available with line pipe or tubing threads, butt weld, or non-pressure seal style. Hammer unions for special field service may be provided on request.