Threaded Full Coupling
Our forged threaded full coupling is internally‑threaded pipe fitting with NPT taper thread on both ends for connecting two identical‑size threaded pipes. Produced strictly following ASME B16.11 and MSS SP‑79 standards, all sizes maintain full nominal dimension without minus tolerance, widely used for power, hydraulic, fire‑fighting and chemical high‑pressure small‑bore piping systems.
Overview
Threaded Full Coupling is a one‑piece hot‑forged pipe sleeve with internal NPT taper threads at both ends, used to join two male‑threaded pipes end‑to‑end. Uniform thick‑wall structure improves pressure‑bearing capacity.
We adopt hot‑forging then CNC precision thread‑machining process. Available materials include carbon‑steel A105 and stainless‑steel A182‑F304 / F316L. Internal threads are precisely machined following NPT standard for tight connection and leakage‑proof performance. We strictly control wall‑thickness and thread dimension, guarantee zero minus‑tolerance without thin‑wall cutting‑corners. Three pressure classes: Class3000, Class6000, Class9000 for different high‑pressure working conditions.
Core Key Features
- Integral hot‑forged forming, thick‑wall structure, high‑pressure and impact‑resistance.
- Double‑end internal NPT thread, perfect connection for two equal‑size threaded pipes.
- Precise CNC‑machined thread for stable sealing under high‑pressure working environments.
- Available raw‑materials: Carbon‑Steel A105; Stainless‑Steel A182‑F304 / F316L.
- Compliant with global standards ASME B16.11 and MSS SP‑79 for high‑pressure forged fittings.
- Complete size range: 1/8″‑4″ (DN6 ~ DN100), support NPT, BSPT, BSPP thread options.
- Zero minus‑tolerance on wall‑thickness and thread dimension, full‑standard nominal size.
- MPI magnetic‑particle inspection and hydro‑static pressure test before shipment, complete MTC material certificates provided.
Technical Specification
| Item | Technical Parameter |
|---|---|
| Product Name | Threaded Full Coupling / NPT Thread Pipe Coupling |
| Connection Type | Double‑End Internal NPT Taper Thread (Optional BSPT, BSPP) |
| Production Craft | Hot‑Forged + CNC Precision Thread Machining |
| 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) |
| Structure Feature | Full coupling with internal threads on both ends |
| 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 auxiliary connecting pipelines
- Petro‑chemical high‑pressure threaded process piping
- Hydraulic‑equipment high‑pressure pipeline connection
- 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 Full Coupling
- Direct forged‑fitting factory supply, regular sizes in‑stock with competitive factory ex‑works price.
- All threaded couplings adopt full‑standard dimensions with zero minus‑tolerance, never use thinner raw‑materials to cut costs.
- Custom thread types (NPT / BSPT / BSPP), body length and surface treatment are available per customer drawings.
- Strict whole‑process quality‑inspection, full‑set 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 long‑distance sea‑transportation.
