Service Metal
3000# Forged Steel Threaded Reducing Couplings
- SKU:
- 3MCPLRT
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
3000# Forged Steel Threaded Reducing Coupling
3000# Forged Steel Threaded Reducing Couplings are designed to connect two different male-threaded pipe sizes in a straight run within compatible high-pressure piping systems.
Manufactured from normalized forged carbon steel conforming to ASME SA105N, these reducing couplings feature female NPT threaded connections sized to transition between different nominal pipe diameters. Forged steel fitting dimensions conform to ASME B16.11, while NPT threads conform to ASME B1.20.1.
Product Highlights
- 3000# forged steel threaded reducing coupling
- Designed to connect two different pipe sizes
- Female NPT threaded connections
- Straight-through reducing configuration
- Compact forged steel construction
- Forged steel fitting material conforms to ASME SA105N
- Material is normalized
- Forged steel fitting dimensions conform to ASME B16.11
- NPT threads 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
- Manufactured in an ISO-certified facility
- Product specification sheet available
- Certificate of Conformance available
Technical Specifications
| Product Type | Threaded Reducing Coupling |
|---|---|
| Pressure Class | 3000# |
| Material | Forged Carbon Steel |
| Connection Type | Female NPT x Female NPT |
| Configuration | Reducing Coupling |
| Primary Function | Connect Two Different Male-Threaded Pipe Sizes in a Straight Run |
| Material Standard | ASME SA105N |
| Heat Treatment | Normalized |
| Dimensional Standard | ASME B16.11 |
| Thread Standard | ASME B1.20.1 |
| 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 |
Reducing Coupling Configuration
Larger Female NPT End
The larger female NPT opening accepts the larger compatible male-threaded pipe or fitting.
Forged Reducing Body
The forged body transitions between the two connection sizes while maintaining a compact straight-through configuration.
Smaller Female NPT End
The smaller female NPT opening connects to the reduced-size male-threaded pipe or fitting.
Construction Details
These 3000# threaded reducing couplings are manufactured from normalized ASME SA105N forged carbon steel. Forged steel fitting dimensions conform to ASME B16.11.
Precision-machined female NPT threads conform to ASME B1.20.1 and allow two different compatible male-threaded pipe sizes to be joined in a single straight fitting.
Why Choose a Forged Steel Threaded Reducing Coupling?
Compact Pipe Size Transition
- Connects two different threaded pipe sizes
- Female NPT connections on both ends
- Maintains a straight piping run
- Eliminates the need for a separate reducer and coupling
- Compact fitting configuration saves installation space
Forged Steel Construction
- Manufactured from forged carbon steel
- Material conforms to ASME SA105N
- Normalized material condition
- Dimensions conform to ASME B16.11
- Manufactured in an ISO-certified facility
Reducing Coupling vs. Full Coupling
Reducing Coupling
A reducing coupling connects two different nominal pipe sizes using female threaded connections while maintaining a straight piping run.
Full Coupling
A standard full coupling generally connects two male-threaded pipe sections of the same nominal size.
Typical Applications
Industrial & Mechanical Piping
- Industrial process piping
- Mechanical piping systems
- Plant utility piping
- Power generation piping
- Fabricated piping assemblies
Threaded Size Transitions
- Oil and gas piping
- Process piping transitions
- Equipment connections
- Commercial piping systems
- Compatible high-pressure threaded systems
Applicable Forged Steel Standards
ASME SA105N
Forged steel fitting material conforms to ASME SA105N and is supplied in the normalized condition.
ASME B16.11 & B1.20.1
Forged steel fitting dimensions conform to ASME B16.11, while NPT threads conform to ASME B1.20.1.
Related MSS Standards
Forged steel socket weld inserts conform to MSS-SP-79, unions conform to MSS-SP-83, and outlet fittings conform to MSS-SP-97.

Ask Willy: Need Pipe Size Help?
Use our common pipe diameters and wall thickness chart to confirm both connection sizes before ordering 3000# forged steel threaded reducing couplings. 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# forged steel threaded reducing coupling.
Pipe Size Chart
Use the common pipe diameters and wall thickness chart to help confirm both the larger and smaller threaded connection sizes before ordering.
Certificate of Conformance
Certificate of Conformance documentation is available through the linked PDF.
Frequently Asked Questions
What is a 3000# forged steel threaded reducing coupling?
It is a forged steel fitting with two different-size female NPT openings designed to connect male-threaded pipe of different nominal sizes in a straight run.
What type of connections does this coupling use?
This fitting uses female NPT threaded connections on both ends.
How is a reducing coupling different from a standard full coupling?
A reducing coupling connects two different nominal pipe sizes, while a standard full coupling generally joins pipe sections of the same size.
Can this fitting replace a reducer and coupling?
In compatible piping layouts, the reducing coupling can provide the size transition and pipe connection within one compact fitting.
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 carbon steel.
What dimensional standard applies?
Forged steel fitting dimensions conform to ASME B16.11.
What standard applies to the NPT threads?
NPT threads conform to ASME B1.20.1.
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 both nominal connection sizes, 3000# class, female NPT configuration, material requirements, and applicable piping-system specifications before ordering.
Important Ordering & Installation Notes
- Confirm both the larger and smaller nominal NPT sizes before ordering.
- This listing is for a 3000# forged steel threaded reducing coupling.
- Confirm the direction and size of the required pipe transition.
- Forged steel fitting material conforms to ASME SA105N and is normalized.
- Forged steel fitting dimensions conform to ASME B16.11.
- NPT threads conform to ASME B1.20.1.
- Verify compatibility with both adjoining male-threaded pipe sections.
- Use appropriate thread sealant or PTFE tape where permitted by the applicable piping code, project specification, and service.
- Avoid excessive tightening that could damage threads or adjoining components.
- Confirm applicable pressure, temperature, material, and project requirements before installation.
- Review the product specification sheet before installation.
- Certificate of Conformance documentation is available from the link above.