Key Features
- High-grade carbon steel construction for superior strength and longevity
- Precision-threaded ends (NPT or BSPT) ensure a tight, leak-proof seal
- Pressure rated up to 3000 psi for demanding marine applications
- Easy to install and remove, saving time during maintenance and repairs
- Compact, robust design resistant to vibration and shock
- Available in sizes from 1/8 inch to 4 inches to suit diverse piping systems
- Optional galvanized or coated finish for enhanced corrosion resistance
Technical Specifications
| Material | Carbon Steel (ASTM A105 / A106 equivalent) |
|---|---|
| Thread Standard | NPT (ANSI B1.20.1) or BSPT (ISO 7-1) |
| Size Range | 1/8" – 4" (DN6 – DN100) |
| Pressure Rating | Up to 3000 psi (PN 200) |
| Temperature Range | -20°C to 300°C (-4°F to 572°F) |
| Surface Finish | Black / Galvanized / Zinc-plated |
| Standards | ASME B16.39 / MSS SP-83 |
| Application | Marine fuel, water, oil, and hydraulic systems |
| IMPA Code | 731826 |
Frequently Asked Questions
What thread standards are available for these steel unions?
These unions are available in both NPT (National Pipe Thread) and BSPT (British Standard Pipe Taper) versions. NPT is common in American-built vessels, while BSPT is widely used in international and European vessels. Be sure to select the correct thread type when ordering.
Can these unions withstand high-pressure marine environments?
Yes, our steel threaded unions are rated for pressures up to 3000 psi, making them suitable for high-pressure fuel, hydraulic, and seawater systems found on commercial and offshore vessels.
Are the unions corrosion-resistant?
Standard units are made of carbon steel with a black or galvanized finish. For enhanced corrosion resistance, we offer zinc-plated or PTFE-coated versions. For prolonged exposure to seawater, we recommend using the galvanized option or considering stainless steel unions (available on request).
How do these unions compare to welded fittings?
Unlike welded fittings, threaded unions allow for quick and easy disconnection of pipes without cutting or re-welding. This is especially beneficial for maintenance and inspection routines in tight shipboard spaces, reducing downtime and labor costs.
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