Threaded Forged Union

Our threaded forged union is a three-piece forged pipe fitting with NPT internal and external threads. It is designed for small-bore, high-pressure piping systems where reliable sealing, easy installation, and frequent maintenance are required.

The union consists of a male end, a female end, and a center ring with PTFE sealing material. This structure provides excellent leak-tight performance under high-pressure conditions and allows quick connection or disconnection without damaging the pipeline.

Suitable for use with stainless steel pipes, carbon steel pipes, and other high-pressure piping applications, this product is widely used in oil and gas, chemical, petrochemical, power, instrumentation, and industrial piping systems.

For other high-pressure threaded forged fittings in our product range, check our Threaded Full Coupling for full-length threaded pipe connection, and Threaded Hex Head Pipe Plug used to seal threaded pipeline ends. Both items are manufactured per ASME B16.11 & MSS SP-79 standards, available in A105 carbon steel and F304/F316L stainless steel.

Overview Of Threaded Forged Union

Threaded Forged Union is a three-piece detachable pipe fitting with NPT internal and external threads. It is made from high-quality forged carbon steel or stainless steel, offering higher mechanical strength and better pressure resistance than cast fittings.

The compact forged structure enables easy assembly, disassembly, and replacement, making it especially suitable for small-bore high-pressure piping, instrument connections, and applications requiring frequent maintenance.

We provide threaded forged unions with different end configurations and material options. Available materials include carbon steel, alloy steel, and stainless steel.

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 Of Threaded Forged Union

Forged three-piece structure

Designed for high-pressure piping systems, providing higher strength and better resistance to mechanical stress.
NPT threaded ends

Internal and external NPT threads allow easy connection to male or female threaded pipes and components.
PTFE sealing ring

The center ring is fitted with a PTFE seal to minimize leakage risk and improve sealing reliability.
Easy installation and maintenance

The union can be quickly assembled or disassembled, reducing downtime and simplifying inspection or replacement.
High-pressure performance

Suitable for small-bore high-pressure piping applications where sealing and structural integrity are critical.
Material availability

Available in carbon steel, alloy steel, and stainless steel to meet different corrosion resistance and temperature requirements.
Compliance support

Designed to meet common industrial standards and customer specifications. Material test reports and inspection documents can be provided upon request.

Technical Specification Of Threaded Forged Union

Item	Technical Parameter
Product Name	Threaded Forged Union / NPT Pipe Union
Type	Three-piece forged union
Connection	NPT internal thread and external thread
Sealing Material	PTFE
Body Material	Carbon Steel, Stainless Steel, Alloy Steel
Application	High-pressure small-bore piping, instrument lines, industrial pipe unions

Applications

Our forged threaded unions are widely applied for small‑bore high‑pressure threaded piping:

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

Forged construction for higher reliability

The three-piece forged design offers superior mechanical strength and pressure resistance compared to cast fittings.
PTFE seal for leak-tight service

The integrated PTFE sealing ring helps reduce leakage risk and ensures stable performance under pressure.
Easy installation and maintenance

The union can be assembled, disassembled, and serviced without special tools, saving installation time.
Multiple material options

Carbon steel, alloy steel, and stainless steel versions are available to suit different medium, temperature, and corrosion requirements.
Customization support

Thread types, materials, pressure ratings, and end configurations can be customized according to customer requirements.
Quality control and documentation

Each product undergoes strict dimensional inspection and pressure testing. Material certificates and inspection reports can be provided.
Fast delivery

Standard products are available in stock, and customized products can be produced according to customer orders.

FAQ

Q1: What is a threaded pipe union used for?

A: Three‑piece threaded union connects two pipes and allows easy disassembly. It is mainly installed where pipelines need frequent inspection or maintenance.

Q2: Do your threaded unions have minus‑tolerance on wall‑thickness?

A: All our forged pipe fittings are strictly manufactured to full‑nominal standard dimensions. We guarantee zero minus‑tolerance on wall‑thickness and thread sizes without thin‑wall cutting‑corners.

Q3: What thread types can you provide?

A: Standard thread is NPT; we also supply BSPP and BSPT British pipe thread according to customer requirements.

Q4: Can you supply stainless‑steel threaded unions?

A: Yes, we produce A182‑F304 and F316L stainless‑steel unions for corrosive‑media environments.

Q5: What other forged threaded fittings match this union for high-pressure piping systems?

A: We also supply the 90 Degree NPT Threaded Elbow, manufactured to ASME B16.11 standard in A105, F304 and F316L material, ideal to build a complete threaded high-pressure pipeline together with threaded forged unions.