Hammer Lug Unions Description

SOUR GAS UNIONS
Reliable hammer lug unions are available in hydrogen sulphide trim (sour gas, H2S) with either threaded or butt weld ends. Sour gas unions are manufactured in accordance with NACE standard MR-01-75. All unions are subjected to rigorous inspection checks throughout manufacture. Sour gas unions have their batch numbers prefixed by the letters SG and for ease of identification are painted olive green.
Note: Most unions for sour gas service are pressure derated.

BUTT WELD UNIONS
Reliable hammer lug unions are available in all Figure (Fig.) numbers as butt weld unions as an alternative to the standard API threaded end. The only exception to this is the Fig. 50 which is available as socket weld only. When ordering butt weld unions, it is best to state the pipe schedule required.

THREADED UNIONS
A full range of API line pipe threaded unions are available from Fig. 50 through to Fig. 1502. Threads are gauged with calibrated working API gauges which, in turn, are checked regularly with API master gauges. In addition, unions with BSP or NPT threads can be supplied upon request.

SPECIALS
In addition to the wide range of hammer lug unions available, NOV regularly manufactures specials to suit specifi customer requirements in regards to materials, dimensions and types.

Reliable Steel Distributors offers a comprehensive range of standard and sour gas Hammer Unions. Each union is thoroughly inspected to ensure long, dependable service in the most extreme conditions. Available in stock at our distribution center in Houston.

• Three lug nuts and self-locking ACME threads provide quick make-up and break-out
• Color coded for quick identification
• Unique identification for sour gas unions
• Meet or exceed National Association of Corrosion Engineers standard NACE MR-01-75 and API RP-14E
• Manufactured from quality steel meeting ASTM and/or AISI standards
• All unions provide pressure-tight & positive sealing for low-pressure services (500 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 1/2” to 12” with cold working pressures from 500 to 20,000 PSI
• Fully interchangeable with most major brands of Hammer Unions