Value Brand
Value Brand Black Forged Steel Coupling Class 3000 3 in FNPT
Black forged steel coupling rated Class 3000 with 3-inch FNPT threads for high-pressure piping systems
- Rated for 3000 psi at 72 degrees Fahrenheit
- Black forged steel construction meets ASTM A105 standard
- 3-inch FNPT threads follow ANSI B1.20.1 specification
- Class 3000 rating complies with ASME B16.11 requirements
- SA105 material certification ensures pressure-vessel quality
3-inch Black Forged Steel Coupling
This coupling is a Class 3000 pipe fitting made from black forged steel. It connects two sections of pipe using female NPT threads on both ends. The fitting meets ANSI B1.20.1, ASME B16.11 and SA105, ASTM A105 standards. It is designed for industrial piping systems requiring a strong, threaded connection.
Forged Steel Build and FNPT Threads
The black forged steel construction provides high mechanical strength for demanding environments. Female NPT threads allow direct assembly onto male-threaded pipe nipples or fittings without welding. The tapered thread design creates a seal when tightened with appropriate sealant. This coupling suits installations where disassembly may be required for maintenance.
Class 3000 Pressure Rating Limits
The fitting is rated for a maximum pressure of 3000 psi at 72 degrees Fahrenheit. Pressure capacity decreases as operating temperature rises above this reference point. The Class 3000 designation defines the wall thickness and pressure boundary for this size. Systems exceeding this pressure or temperature envelope require a higher-class fitting.
Highlights
- Rated for 3000 psi at 72 degrees Fahrenheit
- Black forged steel construction meets ASTM A105 standard
- 3-inch FNPT threads follow ANSI B1.20.1 specification
- Class 3000 rating complies with ASME B16.11 requirements
- SA105 material certification ensures pressure-vessel quality
Specifications
| Brand | Zoro Select |
|---|
Questions about this item
What does the FNPT thread standard mean for sealing on this coupling?
FNPT uses tapered national pipe threads that seal by metal-to-metal interference when tightened, so no gasket or O-ring is required.
What pipe size and schedule class must match this 3-inch Class 3000 coupling?
It fits 3-inch nominal pipe built to the same Class 3000 forged-steel schedule for correct thread engagement and pressure rating.
How is this coupling installed and what common step causes leaks?
Apply PTFE tape or pipe dope to the male threads, hand-tighten, then wrench-tighten one to two turns; skipping thread sealant is the usual cause of leaks.
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