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Hammer Union

Hammer Union

Hammer union we manufactured is used to connect kinds of manifold and lines.

Hammer union we manufactured is used to connect kinds of manifold and lines. It can be divided into three types: threaded connection hammer union, welded hammer union, anti-hydrogen sulfide hammer union. Sizes can be from 1 inch to 4 inch, cold working pressure from 7Mpa to 140Mpa(1000psi-20000psi).


  • Models of threaded connection hammer unions: fig 100, fig 200, fig 206, fig 400, fig 402, fig 602, fig1002, fig 1502.

  • Models of welded hammer union: fig 200, fig 602, fig 1002, fig 1502, fig2002.

  • Models of anti-sulfur welded hammer union: fig602, fig 1002, fig1502, fig2202.


Our hammer unions are exchangeable with FMC, WECO and Kemper hammer union.


ModelWorking PressureFeaturesRecommended service
Fig 100 Hammer Union1,000 psi(69 bar)u Pressure-tight make-up with hammerManifold and line connections
u Economical,low-pressure union
Fig 200 Hammer Union2,000 psi(138 bar)u Economical,general-purpose unionGeneral-service manifolds and lines
u 1-to 4-inch sizes
u Butt-weld available
Fig 206 Hammer Union2,000 psi(138 bar)u O-ring in male sub improves sealing and protects metal-to-metal seal against corrosionManifold and line connections,suction service,and corrosion service
u Replaceable O-ring extends union
u 1-to 10-inch sizes

Fig 207 Hammer Union2,000 psi(138 bar)u Parts are interchangeable with Figs.200 and 206To seal manifold connections and protect union threads
u O-ring on blanking cap ensures a leak-free seal
u Raised lugs on cap allow for make-up with a hammer
u Cap can be tapped for pressure gauge if specified
u Available in butt-weld

Fig 211 Hammer Union2,000 psi(138 bar)u Laminated insulating rings eliminate all metal-to-metal contact;insulating ringsFor production systems with electrolytic corrosion problems
u provide 35 million ohms resistance across the union
u O-ring in male sub provides a positive primary seal
u Seal ring in female sub provides a positive secondary seal
u Insulating rings,O-ring,and seal ring can be replaced to extend union life

Fig 400 Hammer Union4,000psi(276 bar)through 4-inch sizes;u 21/2-through 12-inch sizes have O-rings for primary sealManifold and line connections,pump suction,and mud service
2,500psi(172 bar)through 5 to 12-inch sizesu Butt-weld available

u Available for sour gas service:2,500 psi suction,(172 bar)cold working pressure, 5-through 12-inch sizes;4,000psi (276 bar) coldworking pressure, 1-through 4-inch sizes


Fig 600 Hammer Union6,000psi(414 bar)u Bronze seat provides primary seal;will not rust in water servicesSteam service,boiler connections, manifold,and line connections for production,drilling,and well servicing
Fig 602 Hammer Union6,000psi(414 bar)u CompactManifold and line connections and mud service
u Replaceable,lip-type seal provides primary seal,protects secondary metal-to-metal seal,and minimizes flow turbulence
u Butt-weld available
u Available for sour gas service:6,000 psi (414 bar)cold working pressure

Fig 1002 Hammer Union10,000psi(690 bar)through 4-inch sizes; 7,500 psi(517bar),5-and 6-inch sizesu Replaceable,lip-type seal provides primary seal,protects secondary metal-to-metal,and minimizes flow turbulenceCementing,fracturing,acidizing,testing, and choke-and-kill lines
u Butt-weld available
u Available for sour gas service:7,500 psi (517 bar)cold working pressure
u 5-and 6-inch sizes have O-rings for primary seals

Fig 1003 Hammer UnionMisaligning unionu Ball seat provides positive seal with up to 71/2misalignment;2-inch model up to 4°For high-pressure connections where lines cannot be aligned
10,000 psi(690 bar)2-and 3-inch sizes;u Replacement O-ring on male sub provides primary seal,and protects metal-to-metal seal against abrasion and corrosion
7,500psi(517 bar),4and5 inch sizesu Hammer union connection:available with threaded or butt-weld ends


Fig 1502 Hammer Union15,000 psi(1034 bar)u Replaceable,lip-type seal provides primary seal,protects secondary metal-to-metal seal,and minimizes flow turbulenceCementing,fracturing,acidizing,testing, and choke-and-kill lines
u Butt-weld available
u Available for sour gas service:10,000 psi (690 bar)cold working pressure;butt- weld or non pressure-thread seal  configurations only

Fig 2002 Hammer Union20,000 psi(1380 bar)u Replaceable,lip-type seal provides primary seal,protects secondary metal-to-metal seal,and minimizes flow turbulenceCementing,fracturing,acidizing,testing, and choke-and-kill lines
u 2 and 3-inch line sizes
u Butt-weld configurations only

Fig 2202 Hammer Union15,000 psi(1034 bar)u Meets National Association of Corrosion Engineers Standard MR-01-75 and American Petroleum Institute RP-14EEspecially designed for sour gas service
u Heat-treated components are 100% tested for hardness
u Fluoroelastomer seal rings
u Butt-weld only
u Stamped"sour gas"using low-stress dot stamping and painted with a green zinc-chromate primer to assure quick identification


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