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Hammer Unions

BEST Hammer Unions have long provided the fast make-up and break-out capability needed in the oilfields around the world. BEST unions are manufactured with line pipe threads, butt weld or nonpressure-seal thread ends. BEST offers a wide range of sizes and working pressures to fit our customers requirements for both standard and sour gas service.

UNION WORKING COLOR CODES AVAILABLE SIZES
FIG. NO. PRESSURES (psi) SUBS NUT 1" 1-1/2" 2" 3" 4" 5" 6"
100 1,000 Yellow Black              
200 2,000 Gray Blue              
206 2,000 Gray Blue              
400 4,000 Red Black              
602 6,000 Orange Black              
607 6,000 Silver Red              
1002 10,000 Blue Red              
1003 10,000 Dark Green Black              
1502* 15,000 Red Blue              
BEST can supply forged, alloy steel, unions in all Figure Numbers making them suitable for backweld applications.
BEST forged steel unions in a Butt Weld design are available in all Figure Numbers as well.
Butt Weld Schedules vary based on Union Figure Numbers and Acme Thread standards.
Contact our factory for availability.
* 1502 - 4" is available in buttweld only.

FIGURE 100 UNION : 1,000 PSI WP
1000-psi NSCWP unions are available in 2-inch through 6-inch. Recommended for low-pressure manifolds and applications where working pressures do not exceed 1000-psi.
FIGURE 200 UNION : 2,000 PSI WP
2000-psi NSCWP unions are available in 1-inch through 6-inch. These unions are compact and popular for low pressure rig piping. They also meet most requirements in the medium pressure ranges for air, water, oil or gas service. Available in butt-weld Schedule 40.
FIGURE 206 UNION : 2,000 PSI WP
2000-psi NSCWP unions are available in 1-inch through 6-inch. These unions are fitted with an 0-ring in the male sub seating surface for enhanced sealing. Available in butt-weld Schedule 40.
FIGURE 400 UNION : 4,000 PSI WP
These unions are available in 2, 3, and 4-inch 4000-psi NSCWP. All three parts are made from steel forgings with heavy walls and rugged design. They feature ball and cone sealing for easy alignment and dependable seals. Also available in butt-weld Schedule 80.
FIGURE 602 UNION : 6,000 PSI WP
Recommended for air, water, oil, gas, or mud service to 6000 PSI (non shock cold working pressure). This union has a replaceable lip-type seal ring of Buna-N specifically designed to minimize fluid flow turbulence. The lip-type ring also provides a pressure seal and protection for the metal-to-metal seating surfaces. These unions are smaller and lighter than the Fig. 600 unions and are recommended for manifold and truck mounting where size and weight are critical.
FIGURE 1002 UNION : 10,000 PSI WP
Recommended for air, water, oil, gas or mud service to 10,000 PSI (non shock cold working pressure). This union has a replaceable lip-type seal ring of Buna-N specifically designed to minimize fluid flow turbulence. The lip-type ring also provides a pressure seal and protection for the metal-to-metal seating surfaces. These unions are recommended for manifold and truck mounting or other installations where high pressure is to be encountered.
FIGURE 1003 UNION : 7,500 PSI WP
These unions are available in 4 and 5-inch 7500 psi NSCWP. Recommended for air, water, oil, mud or gas service where alignment of piping is a problem. Especially suitable for high pressure manifolding and drilling rig use. This union incorporates a ball seat that provides for 7-1/2° of misalignment or angular adjustment from center, for a total of 15° misalignment capability. In addition to the steel-to-steel seating of the union, a nitrile o-ring assures a pressure tight connection in any position of misalignment.
FIGURE 1502 UNION : 15,000 PSI WP
Recommended for air, water, oil, gas or mud service to 15,000 PSI (non shock cold working pressure). This union has a replaceable lip-type seal ring of Buna-N specifically designed to minimize fluid flow turbulence. The lip-type ring also provides a pressure seal and protection for the metal-to-metal seating surfaces. These unions are recommended for manifold and truck mounting or other installations where extreme high pressure is to be encountered.

* BEST reserves the right to source low pressure unions from foreign manufacturers