The AlienFrac FIG 400 hammer union is rated at 4,000 PSI non-shock cold working pressure (NSCWP), with a catalogue test pressure of 6,000 PSI. Catalogue sizes are 2, 3 and 4 in. Its thick-wall construction uses ring-shaped and tapered sealing features that help center the connection and maintain a reliable seal during assembly. Review the specifications and dimensions below, then send your required size, end connection, and service conditions for a quotation.
| Specification | Value |
|---|---|
| Figure | FIG 400 |
| Working pressure | 4,000 PSI NSCWP |
| Catalogue test pressure | 6,000 PSI |
| Nominal sizes | 2, 3 and 4 in |
| Material designation | SF (steel forging), nut and parts |
| Color identification | Black nut; red parts |
| Construction | Thick-wall design with ring-shaped and tapered sealing features |
Engineering note: Specifications may vary by configuration. Confirm the controlled drawing, end connection, material specification, test requirements, and service conditions before ordering.
FIG 400 sizes shown below are 2, 3 and 4 in. The dimensions and weights are provided for product selection and reference. Confirm the current controlled drawing before fabrication, installation or mating-component verification.
| Nominal Size | Total Length (mm) | Nut Radius (mm) | Weight |
|---|---|---|---|
| 2 in | 131.8 | 90.5 | 11 lb / 5 kg |
| 3 in | 158.8 | 106.4 | 19.25 lb / 8.7 kg |
| 4 in | 206.4 | 127 | 32 lb / 14.5 kg |
FIG 400 uses thick-wall construction with ring-shaped and tapered sealing features that help center the connection and provide a reliable seal during assembly. The nut and mating parts are designated SF (steel forging). For projects requiring a specific steel grade, heat treatment, hardness, seal material, or material certificate, include these requirements in the RFQ.
This wording stays within what the supplied catalogue supports: FIG 400 is described with thick-wall construction and a ring-shaped/tapered sealing arrangement, while SF is defined in the catalogue as steel forging.
End-connection options may vary by size and configuration. Include the required thread specification or weld-end details in your RFQ so AlienFrac can confirm the suitable FIG 400 configuration. For additional selection information, see the hammer union connection types guide.
Provide the service fluid, operating temperature, maximum working pressure, pressure-cycle conditions, and any sour-service requirements with your RFQ. AlienFrac can then assess the required FIG 400 configuration, materials, and service conditions for the requested application.
FIG 400 is identified by a black nut and red parts. Use color as a secondary identification check only. Verify the figure number, nominal size, pressure rating and component markings before installation. See the hammer union marking guide for additional identification details.
FIG 400 is rated at 4,000 PSI NSCWP, while FIG 600 is rated at 6,000 PSI NSCWP. For applications requiring a higher pressure class, review the FIG 600 hammer union. Pressure rating alone does not determine compatibility; confirm the size, end connection, dimensions and service requirements before selection.
For a quotation, send the required nominal size, quantity, end connection, service fluid, maximum working pressure, operating temperature, and any material, testing, marking or documentation requirements. Include the mating drawing or part number when dimensional compatibility is critical.
If you are still selecting the appropriate figure, review the AlienFrac hammer union range before submitting your RFQ.
No. FIG 400 is rated at 4,000 PSI non-shock cold working pressure (NSCWP). The 6,000 PSI value is the test pressure and should not be used as the allowable working-pressure rating.
Not based on pressure rating alone. FIG 400 and FIG 600 have different pressure classes, and interchangeability also depends on size, end connection, dimensions and mating-component compatibility. Confirm the applicable drawings before substitution.
Do not assume interchangeability based only on the figure number and nominal size. Verify the mating dimensions, end connection, component markings and pressure rating against the applicable drawing before combining or replacing components.
Sour-service suitability depends on the required materials, service conditions, and applicable project specifications. Include the service fluid, temperature, pressure, and sour-service requirements in your RFQ so the requested configuration can be assessed.
Provide the existing figure and size markings, end-connection details and mating-component drawing or dimensions when available. This allows the proposed FIG 400 configuration to be checked against the existing connection.
