Threaded Forged Union
Our forged threaded union consists of three‑piece assembly: nut, male end and female end with PTFE sealing gasket. It enables easy assembly and dis‑assembly of threaded pipelines. Produced strictly following ASME B16.11 and MSS SP‑79 standards, all sizes maintain full nominal dimension without minus tolerance, widely used for instrument, hydraulic and fire‑fighting high‑pressure piping systems.
Overview
Forged Threaded Union is a three‑piece detachable pipe fitting with NPT internal and external threads. It is made up of male half, female half and hexagonal coupling nut with a PTFE or metal gasket between the two ends. It provides a convenient way for quick pipe installation, maintenance and disassembly without cutting pipelines.
We produce this threaded union by hot‑forged integrated forming. Available materials include carbon‑steel A105 and stainless‑steel A182‑F304 / F316L. The NPT threads are precisely machined for tight thread engagement. We strictly control thread size, outer diameter and wall‑thickness to guarantee zero minus tolerance and prevent leakage under high‑pressure conditions. Pressure classes include Class3000, Class6000 and Class9000 for different working requirements.
Core Key Features
- Hot‑forged three‑piece structure with hex‑nut design for easy wrench tightening.
- Precision‑machined NPT threads and matched sealing gasket for leak‑proof connection.
- Detachable design for convenient pipeline maintenance and replacement.
- Available raw‑materials: Carbon‑Steel A105; Stainless‑Steel A182‑F304 / F316L.
- Compliant with ASME B16.11 and MSS SP‑79 high‑pressure forged fitting standards.
- Complete size range: 1/8″ ~ 4″ (DN6‑DN100), compatible with standard NPT threads.
- Zero minus‑tolerance on wall‑thickness and thread dimension without thin‑wall cutting‑corners.
- MPI magnetic‑particle inspection and hydro‑static pressure test before shipment, complete MTC certificates supplied.
Technical Specification
| Item | Technical Parameter |
|---|---|
| Product Name | Threaded Forged Union / NPT Pipe Union |
| Connection Type | NPT Internal & External Thread |
| Production Craft | Hot‑Forged Three‑Piece Integral Forming |
| Executive Standard | ASME B16.11, MSS SP‑79 |
| Available Materials | A105 Carbon Steel; A182‑F304 / F316L Stainless Steel |
| Pressure Class | Class3000, Class6000, Class9000 |
| Size Range | 1/8″‑4″ (DN6 ~ DN100) |
| Gasket Option | PTFE Gasket / Metal Spiral‑Wound Gasket |
| Thread Type | American Standard NPT Taper Thread |
| Dimensional Tolerance | Full‑standard nominal size, zero minus tolerance |
| Inspection Items | MPI Magnetic Particle Test, Hydrostatic Test, Thread Dimension Inspection |
| Surface Treatment | Black Anti‑Rust Paint (Carbon Steel); Pickling & Passivation (Stainless‑Steel) |
Applications
- Power‑plant instrument and sampling control pipelines
- Petro‑chemical high‑pressure threaded process piping
- Hydraulic‑equipment high‑pressure connecting pipelines
- Fire‑protection small‑bore pressure piping systems
- Off‑shore platform anti‑corrosion instrument piping
- Food & pharmaceutical stainless‑steel process pipelines
- Oil‑gas field measuring‑instrument auxiliary piping
Why Choose Our Threaded Forged Union
- Direct forged‑fitting factory supply, regular sizes in‑stock with competitive factory price.
- All unions adopt full‑standard dimensions with zero minus‑tolerance, never use thinner raw‑materials to cut costs.
- Custom thread type (BSPP / BSPT optional), special sizes and surface treatment are available.
- Strict quality‑control process, complete set of export‑certificates for customs clearance.
- Fast delivery within 7‑15 working days for standard stock items.
- Export wooden‑case packaging to avoid rust, scratch and deformation during sea‑shipping.
