Figure 300 Hammer Union — Flat-Face O-Ring, 2,000 psi
Figure 300 hammer union, standard service, threaded ends. 1" to 2", rated 2,000 psi (138 bar). Working pressure stated per size on this page.
Key features
- Figure Number: 300
- Union Type: Union
- End Connection: Threaded (line pipe)
- Service Class: Standard service
- Working Pressure: 2000 psi
- Nominal Size Range: 1" to 2"
- Seal Arrangement: Flat-face O-ring
- Figure Number
- 300
- Union Type
- Union
- End Connection
- Threaded (line pipe)
- Service Class
- Standard service
- Working Pressure
- 2000 psi
- Nominal Size Range
- 1" to 2"
Product description
The Figure 300 is a flat-face O-ring union that lets a short rigid pipe section be broken out sideways.
Applications
Breaking out short pipe segments; low or high pressure vapour or liquid service.
Construction and sealing
- Flat-face O-ring sealing that permits a lateral breakout of a short rigid pipe run.
- Seals equally in low and high pressure vapour or liquid service.
- Sealing: Flat-face O-ring.
Working pressure
2,000 psi (138 bar) cold working pressure, tested at 3,000 psi.
How a hammer union makes up
A hammer union is a three-piece connection. A male sub and a female sub carry the two line ends, and a wing nut turns on a thread cut into the male sub and pulls a shoulder on the female sub down onto the seat. The lugs standing proud of the nut are struck with a hammer to tighten it, which is where the name comes from — the joint is made up and broken out with a sledgehammer rather than a wrench, so a line can be rigged and stripped quickly in the field. The seal is made by the seat, not by the thread: the nut only supplies the load that holds the two seating faces together. That is why a union will leak from a scored seat or a perished seal long before the thread is at fault, and why a worn union is usually a sub or a seal replacement rather than a scrap part.
Specifying one
Four things fix a hammer union: the figure number, which sets the pressure class and decides what it will mate with; the service class, standard or sour gas; the end connection, threaded or butt weld; and the nominal size. Figure numbers are an industry series, so a union of the same figure and size from another maker will mate — but the pressure rating stamped on the union is what governs, not the figure number on its own. Send us the line specification and we will confirm the match before quoting.
Sizes and part numbers
Published in 1" to 2" with threaded ends. The size table on this page states the working pressure for every size. Our source publishes no dimension table for this figure, so none is shown — ask us for a dimensioned drawing and we will get it from the mill rather than infer it.
Identification
| Parameter | Value |
|---|---|
| Figure Number | 300 |
| Union Type | Union |
| End Connection | Threaded (line pipe) |
Performance
| Parameter | Value |
|---|---|
| Service Class | Standard service |
| Working Pressure | 2000 psi |
| Working Pressure | 138 bar |
| Test Pressure | 3000 psi |
Dimensions
| Parameter | Value |
|---|---|
| Nominal Size Range | 1" to 2" |
Sealing
| Parameter | Value |
|---|---|
| Seal Arrangement | Flat-face O-ring |
Shipping & lead time
Sizes & part numbers
2 sizes| Indus part no. | Nominal size | End connection | Working pressure (bar) |
|---|---|---|---|
| IH-HU-300-THD-STD-0100 | 1" | 1" LP thread | 138 |
| IH-HU-300-THD-STD-0200 | 2" | 2" LP thread | 138 |
Working pressure is the manufacturer’s published rating for the fitting itself. An assembly is limited by its lowest-rated component, so check it against the hose, the tube and the port you are mating to.
What is the working pressure of a Figure 300 hammer union?▾
What sizes does the Figure 300 come in?▾
How does a Figure 300 union seal?▾
Is there a sour gas version of the Figure 300?▾
What is included in a hammer union?▾
Shipped worldwide from our Dubai warehouse. Transit, routes and documentation for 126 destinations
The same part, in the designations used across European and Gulf trade catalogues.
- de
- Hammerverschraubung Verschraubung
- fr
- union à marteau union
- es
- unión de martillo unión
- it
- giunto a martello giunto
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