HAMMER UNIONS

HAMMER UNIONS

SI FLOWTECH Hammer unions have the fast make-up and break-out capability needed in the oilfields around the world.
SI FLOWTECH unions are manufactured with line pipe threads, butt weld or nonpressure-seal thread ends.
SI FLOWTECH offers a wide range of sizes and working pressures to fit our customers requirements for standard gas service.
SI FLOWTECH Hammer unions interchangeable with other leading manufacturers' Unions and are readily available from stock.
Whatever your specification, find the one to suit you.

Hammer Union Specifications

UNIONS WORKING TYPE COLOR CODES AVAILABLE SIZES
FIG NO. PRESSURES(psi) USE SUBS NUT 1" 2" 3" 4" 5" 6" 8"
100 1,000 Thread Yellow Black    
200 2,000 Thread Gray Blue    
602 6,000 Thread Orange Black    
Butt-Weld Non Black    
1002 10,000 Thread Blue Red    
Butt-Weld Non Red    
1502 15,000 Thread Red Blue      
Butt-Weld Non Blue      

SI FLOWTECH can supply forged, cast alloy steel, unions in all Figure Numbers making them suitable for backweld applications.
SI FLOWTECH 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.

  • 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 602 UNION : 6,000 PSI WP

    Recommended for air, water, oil, gas or mud service to 6000-psi NSCWP. 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 NSCWP. 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 1502 UNION : 15,000PSI WP

    Recommended for air, water, oil, gas or mud service to 15,000-psi NSCWP. 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.