Unions
Hammer Unions
FIGURE 100
LOW PRESSURE SERVICE / GENERAL USE
Hammer union designed for low-pressure service in oilfield and industrial applications. Built with precision metal-to-metal sealing surfaces, it delivers reliable sealing and consistent performance. Ideal for systems requiring dependable connections in water, oil, and gas service.
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Highlights
- 1,000 PSI NSCWP; test pressure 1,500 PSI; sizes 2″ through 8″
- End connections: threaded and butt-weld (Schedule 40 standard, Schedule 80 XH available)
- A105/LF2 carbon steel or A395 ductile iron sub and nut material depending on size
- Metal-to-metal sealing surfaces; interchangeable with other major manufacturers
- Color code: yellow subs / black nut
Application
- Water, oil, and gas production and transfer piping connections
- General oilfield piping connections at up to 1,000 PSI
FIGURE 110
ELECTRICAL ISOLATION / CORROSION PROTECTION
Hammer union designed to provide electrical isolation in piping systems where corrosion protection is required. Built with insulating components and dual sealing elements, it maintains both isolation and pressure integrity. Ideal for applications utilizing cathodic protection systems.
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Highlights
- 2,500 PSI NSCWP (test 3,750 PSI) and 4,000 PSI NSCWP (test 6,000 PSI); 2″ threaded
- Two insulating rings separate metallic components; double Buna-N O-ring seal (-20°F to 250°F)
- Electrically insulating design for cathodic protection and corrosion mitigation applications
- A105 carbon steel sub and nut; interchangeable with other major manufacturers
- Color code: orange subs/nut (2,500 PSI); brown subs/nut (4,000 PSI)
Application
- Piping systems with cathodic protection systems requiring electrical isolation
- Corrosion mitigation installations in oil and gas production flowlines
FIGURE 200
MEDIUM PRESSURE SERVICE / STANDARD OILFIELD USE
Hammer union designed for medium-pressure service and widely used across oilfield applications. Built with precision sealing surfaces, it provides dependable pressure sealing and consistent performance. Ideal for systems requiring reliable connections across a broad range of service conditions.
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Highlights
- 2,000 PSI NSCWP; test pressure 3,000 PSI; sizes 1″ through 10″
- End connections: threaded, butt-weld (Schedule 40 and 80), and socket weld
- A105/LF2 carbon steel or A216 WCB sub and nut; stainless steel subs available (-SS suffix)
- Precision metal-to-metal seating surfaces; interchangeable with other major manufacturers
- Color code: gray subs / blue nut
Application
- Wellhead and flowline connections on oil and gas production equipment
- Manifold and truck-mounted piping connections at medium pressure
FIGURE 201
EUE THREAD CONNECTION / HIGHER PRESSURE SERVICE
Hammer union designed for tubing connections using EUE threads in higher-pressure applications. Built with a flat-face design and O-ring seal, it provides reliable sealing and secure connections. Ideal for oilfield systems requiring durable performance with API tubing configurations.
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Highlights
- 3,000 PSI NSCWP; test pressure 4,000 PSI; 2-3/8″ and 2-7/8″ EUE API tubing sizes
- EUE 8-round threaded end connections; flat-face union design
- Buna-N O-ring seal on female sub (-20°F to 250°F); A105 carbon steel sub and nut
- Interchangeable with other major manufacturers
Application
- Tubing connections on oil and gas wellheads and production equipment using EUE API threads
- Water, oil, and gas service on 8-round tubing connections at up to 3,000 PSI
FIGURE 26H
FRAC SERVICE / INTEGRAL HOSE BARB CONNECTION
Hose barb union designed for frac service to eliminate the need for welded hose nipples. Built with integral hose shanks, it provides a secure and efficient connection while maintaining interchangeability with standard hammer union components. Ideal for high-use applications requiring fast installation and reliable hose connections.
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Highlights
- 2,000 PSI NSCWP; test pressure 3,000 PSI; sizes 1″ through 10″
- End connections: threaded, butt-weld (Schedule 40 and 80), and socket weld
- A105/LF2 carbon steel or A216 WCB sub and nut; stainless steel subs available (-SS suffix)
- Precision metal-to-metal seating surfaces; interchangeable with other major manufacturers
- Color code: gray subs / blue nut
Application
- Wellhead and flowline connections on oil and gas production equipment
- Manifold and truck-mounted piping connections at medium pressure
FIGURE 206
O-RING SEAL DESIGN / ENHANCED LEAK PROTECTION
Hammer union designed with an added O-ring seal to provide secondary sealing and improved leak protection. Built to maintain full interchangeability with standard Figure 200 components, it delivers enhanced sealing performance in demanding service conditions. Ideal for applications requiring added sealing reliability without changing system configuration.
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Highlights
- 3,000 PSI NSCWP; test pressure 4,000 PSI; 2-3/8″ and 2-7/8″ EUE API tubing sizes
- EUE 8-round threaded end connections; flat-face union design
- Buna-N O-ring seal on female sub (-20°F to 250°F); A105 carbon steel sub and nut
- Interchangeable with other major manufacturers
Application
- Tubing connections on oil and gas wellheads and production equipment using EUE API threads
- Water, oil, and gas service on 8-round tubing connections at up to 3,000 PSI
FIGURE 207
LINE BLANKING / TEMPORARY ISOLATION
Blanking union designed for safe and effective closure of flowlines and manifold connections. Built with an integrated sealing cap, it provides secure shutoff while remaining fully interchangeable with standard hammer union components. Ideal for applications requiring temporary isolation or line closure.
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Highlights
- Buna-N O-ring in blanking cap for dependable flowline closure (-20°F to 250°F)
- Female sub interchangeable with Figure 200 and 206 male sub and nut
- 2,000 PSI NSCWP; test pressure 3,000 PSI; sizes 3″, 4″, and 6″
- End connections: threaded and butt-weld (Schedule 40 and 80); A105 sub, nut, and cap
- Interchangeable with other major manufacturers; color code: gray subs / blue cap
Application
- Blanking off live flowline and manifold connections on production equipment
- Temporary closure of Figure 200/206 union connections during maintenance
FIGURE 211
ELECTRICAL ISOLATION / CORROSION PROTECTION
Hammer union designed to provide electrical isolation in medium-pressure piping systems. Built with insulating components and dual sealing elements, it prevents metal-to-metal contact while maintaining pressure integrity. Ideal for applications requiring corrosion protection through electrical isolation.
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Highlights
- Insulating seals eliminate metal-to-metal contact for electrical isolation at 2,000 PSI
- Buna-N O-ring on male sub; neoprene seal ring on female sub (-20°F to 250°F)
- 2,000 PSI NSCWP; test pressure 3,000 PSI; sizes 2″ and 3″ threaded
- A105 carbon steel sub and nut; interchangeable with other major manufacturers
- Color code: blue subs / gray nut
Application
- 2,000 PSI cathodic protection systems requiring electrical isolation at medium pressure
- Corrosion mitigation in oil and gas production flowlines
FIGURE 300
FLAT-FACE SEAL / COMPACT CONNECTIONS
Hammer union designed with a flat-face sealing configuration for applications requiring straight breakout and compact connections. Built with an O-ring seal, it provides reliable pressure sealing across a wide range of service conditions. Ideal for systems requiring versatile performance in a compact design.
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Highlights
- Flat-face design for straight pipe segment breakout; Buna-N O-ring on female sub (-20°F to 250°F)
- Pressure ratings: 2,000, 2,500, and 12,500 PSI NSCWP; sizes 1/2″ through 2″
- A105/LF2 carbon steel (2,000/2,500 PSI); SAE 4130/4140 alloy steel (12,500 PSI)
- Interchangeable with other major manufacturers
- Color code: orange/black (2,000 PSI); zinc-plated subs and nut (2,500 and 12,500 PSI)
Application
- Straight breakout of pipe segments on production manifolds and equipment
- High-pressure instrument and control line connections at up to 12,500 PSI
FIGURE 301
HIGH PRESSURE SERVICE / METAL-TO-METAL SEALING
Hammer union designed for high-pressure service with precision metal-to-metal sealing surfaces. Built for durability and consistent performance, it delivers reliable connections in water, oil, and gas applications. Ideal for systems requiring dependable sealing at elevated pressures.
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Highlights
- 3,000 PSI NSCWP; test pressure 4,500 PSI; size 2″; threaded and socket weld end connections
- A105/LF2 carbon steel sub and nut; metal-to-metal sealing surfaces
- Interchangeable with other major manufacturers; color code: gray subs / gray nut
Application
- High-pressure water, oil, and gas connections at up to 3,000 PSI
- Wellhead and production equipment socket weld connections
FIGURE 400
HIGH PRESSURE SERVICE / BALL & CONE SEAL DESIGN
Hammer union designed for high-pressure applications requiring reliable metal-to-metal sealing. Built with a ball and cone sealing design, it provides consistent performance and long service life under demanding conditions. Ideal for oilfield systems requiring durable, high-pressure connections.
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Highlights
- Ball and cone metal-to-metal sealing surface for dependable high-pressure seal
- 4,000 PSI NSCWP; test pressure 6,000 PSI; sizes 2″, 3″, 4″, and 12″
- End connections: threaded and butt-weld Schedule 80; A105 carbon steel sub and nut
- Interchangeable with other major manufacturers; color code: red subs / black nut
Application
- High-pressure water, oil, and gas connections at up to 4,000 PSI
- Large-bore (12″) manifold and production equipment connections
FIGURE 602
TURBULENCE REDUCTION / HIGH-VELOCITY FLOW
Hammer union designed to reduce flow turbulence in high-velocity applications. Built with a specialized internal design and replaceable sealing components, it improves flow efficiency while maintaining reliable pressure sealing. Ideal for manifold and truck-mounted systems requiring reduced turbulence and extended component life.
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Highlights
- 6,000 PSI NSCWP; test pressure 9,000 PSI; sizes 1″ through 4″
- Turbulence-reducing design for high-velocity fluid service; replaceable Buna-N lip-type seal ring
- End connections: threaded and butt-weld (Schedule 80, 160, and XXH)
- 4130/4140 alloy steel sub and nut; interchangeable with other major manufacturers
- Color code: orange subs / black nut
Application
- Manifold and truck-mounted connections in high-pressure, high-velocity fluid service
- Air, water, oil, gas, and mud service at up to 6,000 PSI
FIGURE 607 (CGC)
GUIBERSON STYLE / LIP SEAL DESIGN
Guiberson-style hammer union designed for 6,000 PSI service with threaded NPT connections and forged alloy steel construction. Extended subs allow for quick breakout in applications, while a lip seal ring provides reliable pressure sealing. Ideal for hot oil service and applications requiring fast, repeatable connections.
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Highlights
- Guiberson-style design with extended subs for quick manifold and truck breakout
- Buna-N vee lip seal ring on female sub (-20°F to 250°F)
- 6,000 PSI NSCWP; test pressure 9,000 PSI; sizes 1-1/2″ and 2″ threaded
- 4130/4140 alloy steel sub and nut; interchangeable with other major manufacturers
- Color code: silver subs / orange nut
Application
- Hot oil and high-pressure manifold and truck-mounted connections
- Applications requiring Guiberson-style union compatibility at 6,000 PSI
FIGURE 1002
TURBULENCE REDUCTION / HIGH PRESSURE FLOW
Hammer union designed to reduce flow turbulence in high-pressure systems. Built with a replaceable lip-type seal, it protects metal-to-metal seating surfaces while maintaining consistent pressure sealing. Ideal for air, water, oil, gas, and mud service where flow efficiency and durability are critical.
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Highlights
- Turbulence-reducing design; Buna-N lip-type seal ring seals and protects seating surfaces
- 10,000 PSI NSCWP (test 15,000 PSI); sizes 1″ through 6″
- 5″ threaded derated to 5,000 PSI; 5″ and 6″ butt-weld derated to 7,500 PSI
- End connections: threaded and butt-weld (Schedule 160 and XXH)
- 4130/4140 alloy steel; NACE and sour gas service available (-SG suffix) in 2″ and 3″
- Interchangeable with other major manufacturers; color code: blue subs / red nut
Application
- Frac, workover, and well servicing in high-pressure service environments
- High-pressure manifold, truck, and wellsite fluid transfer at up to 10,000 PSI
FIGURE 1003
MISALIGNMENT COMPENSATION / ANGULAR FLEXIBILITY
Hammer union designed to compensate for piping misalignment in high-pressure systems. Allows for angular deflection while maintaining a secure pressure seal, reducing stress on connected components. Ideal for installations where alignment tolerance and connection integrity are both critical.
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Highlights
- Misaligning design provides up to 7.5° angular adjustment from center (15° total)
- 3″ at 10,000 PSI NSCWP (test 15,000 PSI); 4″ and 5″ at 7,500 PSI (test 11,250 PSI)
- Sizes 3″, 4″, and 5″; butt-weld Schedule XXH (Schedule 160 available on request)
- Buna-N lip-type seal ring (-20°F to 250°F); 4130/4140 alloy steel sub and nut
- Interchangeable with other major manufacturers; color code: green subs / black nut
Application
- High-pressure piping systems where angular misalignment cannot be avoided
- Wellsite and manifold connections requiring flexible angular accommodation
FIGURE 1502
EXTREME PRESSURE SERVICE / TURBULENCE REDUCTION
Hammer union designed for extreme pressure service with turbulence-reducing internal geometry. Built with a replaceable seal ring to protect seating surfaces and maintain long-term sealing performance. Ideal for high-pressure manifolds, truck-mounted systems, and demanding wellsite applications.
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Highlights
- Turbulence-reducing design; Buna-N lip-type seal ring seals and protects seating surfaces
- 15,000 PSI NSCWP (test 22,500 PSI); NACE derated to 10,000 PSI (test 15,000 PSI)
- Sizes 1″ through 6″ threaded; 2″ through 5″ butt-weld Schedule XXH
- 4130/4140 alloy steel; NACE and sour gas (-SG suffix) available in 2″ and 3″
- Interchangeable with other major manufacturers
- Color code: red/blue (standard); silver/green (NACE)
Application
- Extreme high-pressure frac, workover, and well servicing connections
- Manifold and truck-mounted connections at up to 15,000 PSI
O-Ring Unions
O-RING UNION
LEAK-RESISTANT SEAL / INJECTION SYSTEM SERVICE
O-ring union designed for secure, leak-resistant connections in injection systems. Built for easy installation and maintenance, it allows quick disassembly without disturbing surrounding components. Ideal for applications requiring reliable sealing and serviceability.
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Highlights
- Any assembly component removable or replaceable without full installation teardown
- Multiple sizes; FNPT or socket weld connections
- ANSI 1500 pressure rating; 316 SS construction
Application
- Waterflood and CO2 injection assembly plumbing connections
- Injection tree installations requiring routine component access and maintenance