HAMMER-UNIONS: Engineers & services offers a wide range of standard and sour gas Hammer Unions. Each is carefully inspected to assure long, dependable service in the most extreme conditions. Three lug nuts and self-locking ACME threads provide quicemake-up and break-out.Color coded for quick identification.Unique identification for sour gas unions.Some include elastomer seal depending on size, pressure rating and style.Meet or exceed National Association of Corrosion Engineers standard NACE MR-01-75 and API RP-14E.All materials used meet ASTM andor AISI standards.All unions provide pressure-tight & positive sealing for low-pressure services (1, 000 to 2, 000 PSI).The spherical surface male sub and angular surface female sub form a metal-to-metal seal, the ball and tangent provides a perfect seal.Range from 1 to 12 with cold working pressures from 1, 000 to 20, 000 PSI.