Service Metal
3000# Forged Steel Socket Weld Unions
- SKU:
- 3MUS
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
3000# Forged Steel Socket Weld Union
3000# Forged Steel Socket Weld Unions are designed to connect two sections of compatible pipe while allowing the piping system to be disconnected for maintenance, equipment removal, or future service.
Manufactured from normalized forged steel conforming to ASME SA105N, these unions provide a compact, serviceable connection for industrial, commercial, mechanical, and process piping systems. Forged steel fitting dimensions conform to ASME B16.11, forged steel unions conform to MSS-SP-83, and the manufacturing facility is ISO certified.
Product Highlights
- 3000# forged steel socket weld union
- Socket weld connections
- Designed to connect and disconnect piping without cutting pipe
- Three-piece union configuration
- Useful for maintenance and equipment access
- Forged steel fitting material conforms to ASME SA105N
- Material is normalized
- Forged steel fitting dimensions conform to ASME B16.11
- NPT threads on applicable forged steel fittings conform to ASME B1.20.1
- Forged steel socket weld inserts conform to MSS-SP-79
- Forged steel unions conform to MSS-SP-83
- Forged steel outlet fittings conform to MSS-SP-97
- Manufacturing facility is ISO certified
- Product specification sheet available
- Certificate of Conformance available
Technical Specifications
| Product Type | Socket Weld Union |
|---|---|
| Pressure Class | 3000# |
| Material | Forged Steel |
| Connection Type | Socket Weld |
| Configuration | Three-Piece Union |
| Primary Function | Provide a Removable Piping Connection |
| Material Standard | ASME SA105N |
| Heat Treatment | Normalized |
| Dimensional Standard | ASME B16.11 |
| Thread Standard | ASME B1.20.1 for Applicable NPT Forged Steel Fittings |
| Socket Weld Insert Standard | MSS-SP-79 |
| Forged Steel Union Standard | MSS-SP-83 |
| Outlet Fitting Standard | MSS-SP-97 |
| Manufacturing | ISO-Certified Facility |
| Documentation | Specification Sheet and Certificate of Conformance Available |
Socket Weld Union Configuration
Socket Weld End
One end accepts compatible pipe into the machined socket for welded installation.
Union Nut & Joint
The center union assembly allows the two sides of the connection to be joined or separated without cutting the adjoining pipe.
Opposite Socket Weld End
The second socket connects to the adjoining pipe to complete the removable union assembly.
Construction Details
These 3000# socket weld unions are manufactured from normalized forged steel conforming to ASME SA105N. Forged steel fitting dimensions conform to ASME B16.11, while forged steel unions conform to MSS-SP-83.
The union configuration provides welded pipe connections on both sides while allowing the center joint to be separated when maintenance, equipment removal, or system modifications are required.
Why Choose a Forged Steel Socket Weld Union?
Maintenance-Friendly Connection
- Allows piping sections to be disconnected without cutting pipe
- Useful near valves, pumps, equipment, and service points
- Supports future maintenance and replacement
- Provides a compact removable joint
- Designed for compatible 3000# socket weld systems
Forged Steel Construction
- Manufactured from forged steel
- Material conforms to ASME SA105N
- Normalized material condition
- Dimensions conform to ASME B16.11
- Union configuration conforms to MSS-SP-83
Union vs. Full Coupling
Socket Weld Union
A union allows the piping connection to be separated after installation, making it useful where future maintenance or equipment access may be required.
Socket Weld Full Coupling
A full coupling creates a permanent welded connection between two pipe sections and is not designed to be disassembled after installation.
Typical Applications
Industrial & Mechanical Piping
- Industrial process piping
- Mechanical piping systems
- Plant utility piping
- Power piping systems
- Fabricated piping assemblies
Serviceable Connections
- Pump connections
- Valve connections
- Equipment piping
- Maintenance-access points
- Compatible high-pressure socket weld systems
Applicable Forged Steel Standards
ASME SA105N & B16.11
Forged steel material conforms to ASME SA105N in the normalized condition, and fitting dimensions conform to ASME B16.11.
MSS-SP-79 & MSS-SP-83
Forged steel socket weld inserts conform to MSS-SP-79, while forged steel unions conform to MSS-SP-83.
MSS-SP-97
Forged steel outlet fittings conform to MSS-SP-97.

Ask Willy: Need Pipe Size Help?
Use our common pipe diameters and wall thickness chart to confirm sizing before ordering 3000# forged steel socket weld unions. You can also review the product specification sheet and Certificate of Conformance below.
Product Documentation
Product Specification Sheet
Review the specification sheet for dimensional and product-specific information on the 3000# socket weld union.
Pipe Size Chart
Use the common pipe diameters and wall thickness chart to help confirm compatible pipe sizing before ordering.
Certificate of Conformance
Certificate of Conformance documentation is available through the linked PDF.
Frequently Asked Questions
What is a 3000# forged steel socket weld union?
It is a forged steel fitting designed to connect two socket weld pipe sections while allowing the joint to be separated for maintenance or equipment access.
How is a union different from a coupling?
A union is designed to be disconnected after installation, while a socket weld coupling creates a permanent welded connection between the adjoining pipe sections.
What type of connection does this union use?
This fitting uses socket weld connections on the pipe ends.
What standard applies specifically to forged steel unions?
Forged steel unions conform to MSS-SP-83.
What material standard applies?
The supplied product information states that forged steel fitting material conforms to ASME SA105N.
Is the material normalized?
Yes. The supplied product information specifies normalized forged steel material.
What dimensional standard applies?
Forged steel fitting dimensions conform to ASME B16.11.
What standard applies to forged steel socket weld inserts?
Forged steel socket weld inserts conform to MSS-SP-79.
What standard applies to forged steel outlet fittings?
Forged steel outlet fittings conform to MSS-SP-97.
Is the manufacturing facility ISO certified?
Yes. The supplied product information states that the manufacturing facility is ISO certified.
What should I verify before ordering?
Confirm the nominal pipe size, 3000# class, socket weld configuration, union requirements, material requirements, and applicable piping-system specifications before ordering.
Important Ordering & Installation Notes
- Confirm the required nominal pipe size before ordering.
- This listing is for a 3000# forged steel socket weld union.
- Confirm that a removable union connection is appropriate for the intended piping layout.
- Forged steel fitting material conforms to ASME SA105N and is normalized.
- Forged steel fitting dimensions conform to ASME B16.11.
- Forged steel unions conform to MSS-SP-83.
- Verify compatibility with both adjoining pipe connections.
- Confirm applicable pressure, temperature, dimensional, material, and project requirements.
- Use qualified welding procedures and personnel as required by the applicable piping code or project specification.
- Maintain the required socket weld fit-up and expansion gap where applicable.
- Ensure the union faces and sealing surfaces remain clean and properly aligned during assembly.
- Review the product specification sheet before installation.
- Certificate of Conformance documentation is available from the link above.