Description
Send Six Details for Fast Selection
For an accurate match, drawing confirmation and quotation, please provide:
- Figure number
- Nominal size
- Working pressure
- Threaded or butt-weld end
- Standard, low-temperature or H2S service
- Required quantity
High-Pressure Hammer Union Overview
A hammer union creates a fast mechanical connection between two pressure-containing flow iron components. The complete assembly consists of a male sub, female sub, wing nut and figure-specific sealing system.
The heavy-duty ACME wing-nut thread draws the matched subs together and loads the sealing interface. The connection can be made up or broken out without rotating the connected pipe, allowing valves, swivel joints, pup joints, manifolds and pump discharge lines to be installed or removed efficiently.
GPE supplies complete high-pressure hammer unions, male and female subs, wing nuts, seals, blind components and repair kits. Final compatibility is controlled by the figure, size, pressure class, connection geometry, seal profile and service class—not by appearance or color alone.
| 1–5 inNominal sizes | 1K–20KPressure classes | 10 FiguresFig 100–2202 | 3 ServicesStandard / LT / H2S |
Main Components
| Component | Function |
|---|---|
| Male Sub | Forms one side of the pressure interface and contains the male sealing nose, flow bore and external connection. |
| Female Sub | Receives the male sub and contains the metal seat or seal groove and external ACME thread. |
| Wing Nut | Draws the two subs together. Its lugs provide the approved impact surfaces for controlled makeup and breakout. |
| Seal System | Uses a figure-specific metal seat, O-ring, lip-type seal or engineered pressure-supported seal. |
Main Technical Specifications
| Parameter | GPE Manufacturing Range |
|---|---|
| Product | High-Pressure Hammer Union |
| Alternative names | Wing Union / Flow Iron Union |
| Nominal sizes | 1–5 in |
| Working pressure | 1,000–20,000 psi / approximately 7–140 MPa, depending on figure and approved configuration |
| Figure range | Fig 100, 200, 206, 400, 602, 1002, 1003, 1502, 2002 and 2202 |
| End connections | Threaded or butt weld |
| Main material | Forged carbon or alloy steel according to figure, service and approved drawing |
| Service | Standard, Low-Temperature or H2S Service in approved configurations |
| Applications | Fracturing, cementing, acidizing, testing, pressure pumping and flowback |
| Identification | Figure, size, pressure, service class and heat/batch traceability |
| Inspection | Material, UT, MPI, hardness, dimensional, thread, seal and visual inspection as specified |
| Testing | Figure-specific hydrostatic pressure test |
| Supply scope | Complete unions, subs, wing nuts, seals, blind components and repair parts |
The approved GPE drawing, product marking and purchase specification control the final pressure, material, dimensions, connection, seal and service class.
Hammer Union Figure and Pressure Range
Figure numbers identify different pressure classes, geometries and sealing arrangements. They are not interchangeable labels.
| Figure | Pressure Reference | Configuration | Typical Service |
|---|---|---|---|
| Fig 100 | 1,000 psi | Metal-to-metal seating | Compatible low-pressure water and oil lines |
| Fig 200 / 206 | 2,000 psi | Precision seat or O-ring-assisted seal | General service and manifolds |
| Fig 400 | 4,000 psi | Ball-and-cone metal seal | Medium-pressure service |
| Fig 602 | 6,000 psi | Replaceable resilient seal ring | Cementing and circulation |
| Fig 1002 | 10,000 psi | Replaceable high-pressure seal | Cementing, acidizing and testing |
| Fig 1003 | Figure/size dependent | Misaligning ball-seat configuration | Controlled angular alignment |
| Fig 1502 | 15,000 psi | High-pressure replaceable seal ring | Hydraulic fracturing and high-pressure flow iron |
| Fig 2002 | 20,000 psi | Engineered ultra-high-pressure interface | Pressure pumping and testing |
| Fig 2202 | Approved sour-service configuration | Controlled-hardness materials and sour-service seals | H2S well-service lines |
A figure-level pressure reference is not a complete purchasing specification. Size, bore, end connection, pipe wall, material, temperature, fluid, service class and approved drawing must also be confirmed.
Available Configurations
GPE supplies threaded and butt-weld complete assemblies, male and female subs, wing nuts, figure-specific seals, blind components and repair parts.
Complete matched assembly and components |
Fig 1502 high-pressure configuration |
- Threaded ends: manufactured to the approved thread, orientation and gauge requirements.
- Butt-weld ends: manufactured to the specified OD, bore, wall thickness, material and weld preparation.
- Blind components: male/female blind unions, caps and plugs for approved test and isolation arrangements.
- Spare parts: seal rings, O-rings, wing nuts, subs, retainers, protectors and service kits.
Applications
- Hydraulic fracturing: frac pumps, discharge manifolds, plug valves, check valves, swivel joints, straight pipe and wellhead-side flow iron.
- Cementing: cementing units, pumps, manifolds, cement heads, circulation heads and flush lines.
- Acidizing: material and seal selection according to fluid chemistry, temperature and corrosive components.
- Well testing: temporary high-pressure test lines and pressure-control assemblies.
- Flowback: pressure-containing lines requiring planned bore, erosion and wall-thickness inspection.
- Equipment integration: pup joints, rigid pipe, manifolds and packaged well-service equipment.
Manufacturing, Inspection and Testing
Manufacturing control begins with figure-specific material selection and heat-number identification. Forged pressure components receive controlled heat treatment, CNC machining, dimensional inspection and permanent marking according to the approved manufacturing plan.
- Material-certificate and heat-number verification
- Controlled forging and heat treatment
- Bore, seat, seal-groove, ACME thread and end-connection machining
- Specified UT, MPI, hardness and dimensional inspection
- Thread-gauge and sealing-surface inspection
- Figure-specific hydrostatic pressure testing
- Permanent figure, size, pressure and service marking
- Final inspection, protection and export packaging
Connection Compatibility and Safety
Visual similarity does not confirm compatibility. A safe connection requires a matched male sub, female sub, wing nut and seal. Confirm figure, size, pressure, geometry, ACME thread, seal profile, bore and service class.
- Never strike, tighten, loosen or dismantle a pressurized union.
- Never exceed the marked working pressure or the lowest system rating.
- Never mix different figures or Standard and H2S Service parts.
- Never force damaged or mismatched threads.
- Never use color as the only identification method.
- Never use a hammer union as a lifting or suspension point.
Information Required for Quotation
- Figure number and nominal size
- Normal and maximum working pressure
- Threaded or butt-weld construction
- Thread type and pin/box orientation
- Pipe OD, bore, wall thickness and weld preparation
- Male, female, blind or complete assembly
- Service fluid, temperature and proppant information
- Standard, low-temperature or H2S service
- Existing drawing, part number or sample data
- Inspection, testing and documentation requirements
- Quantity, destination and required delivery date
Related Flow Iron Equipment
Plug Valves
Check Valves
Swivel Joints
Relief Valves
Browse the complete frac iron and high-pressure flowline equipment range.
Frequently Asked Questions
What hammer union sizes does GPE manufacture?
GPE’s published manufacturing range covers nominal sizes from 1 to 5 in. Availability depends on the selected figure, pressure class, end connection and service configuration.
Which figure is used for 15,000 psi fracturing service?
Fig 1502 is the principal published 15,000 psi hammer union connection for hydraulic fracturing and high-pressure flow iron. Final size, material, seal and end configuration must be confirmed from the approved drawing.
Are threaded and butt-weld hammer unions available?
Yes. Specify the approved thread and orientation or provide the pipe OD, bore, wall thickness, material and weld preparation.
Can different hammer union figures be connected?
No. Different figures are not treated as compatible. Figure, size, pressure, geometry, thread, seal and service class must match.
Is color enough to identify a hammer union?
No. Verify the permanent figure, nominal size, working pressure, service class and traceability marking. Color is only a visual aid.
Are replacement seals and parts available?
Yes. GPE supplies figure-specific seal rings, O-rings, pressure seals, male and female subs, wing nuts, retaining parts, blind components and service kits.
Can GPE manufacture a replacement-compatible complete union?
GPE can evaluate a complete replacement assembly using approved drawings, dimensions, part numbers or physical samples. Components from different manufacturers should not be mixed without formal verification and pressure testing of the complete assembly.
What information is required for quotation?
Provide the figure, size, pressure, end connection, fluid, temperature, service class, drawing or dimensions, quantity, testing, documentation, destination and delivery requirements.
Confirm the Complete Connection Before Ordering
Send the figure, size, pressure, connection, service condition and quantity. GPE will review the matched assembly, seal, dimensions, testing and documentation before quotation.
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