ASC
150# Stainless Steel Reducer Coupling
- SKU:
- S3114RC & S3116RC
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Stainless Steel Reducer Coupling
SCI Heavy Pattern 150# Stainless Steel Reducing Couplings provide a compact threaded transition between two different nominal pipe sizes in compatible stainless steel piping systems.
Manufactured from cast stainless steel, these heavy-pattern reducing couplings are available in 304 stainless steel and 316 stainless steel configurations. Both ends use female NPT threads, allowing a larger male-threaded pipe or fitting to transition directly to a smaller male-threaded connection.
Product Highlights
- Heavy Pattern 150# stainless steel reducing coupling
- Female NPT x Female NPT reducing configuration
- Designed to transition between two different nominal pipe sizes
- NPT threads conform to ASME B1.20.1
- Cast stainless steel construction
- 304 stainless steel / ASTM A351 CF8 configuration
- 316 stainless steel / ASTM A351 CF8M configuration
- SCI Figure S3114RC for 304 stainless steel
- SCI Figure S3116RC for 316 stainless steel
- Heavy Pattern 150# threaded fitting construction
- Compact inline reducing connection
Technical Specifications
| Product Type | Reducing Coupling |
|---|---|
| Pressure Class | 150# |
| Pattern | Heavy Pattern |
| Construction | Cast Stainless Steel |
| Connection Type | Female NPT x Female NPT |
| Function | Threaded Pipe Size Reduction |
| Thread Standard | ASME B1.20.1 |
| 304 Stainless Figure | S3114RC |
| 316 Stainless Figure | S3116RC |
| 304 Stainless Material | ASTM A351 ACI Grade CF8 |
| 316 Stainless Material | ASTM A351 ACI Grade CF8M |
| Fitting Style | Inline Reducing Coupling |
Construction Details
SCI Heavy Pattern 150# Reducing Couplings are manufactured from cast stainless steel. SCI identifies its 304 stainless steel castings as ASTM A351 ACI Grade CF8 and its 316 stainless steel castings as ASTM A351 ACI Grade CF8M.
The fitting uses two female NPT threaded openings of different nominal sizes, creating a direct threaded transition between a larger and smaller male-threaded pipe, nipple, fitting, or equipment connection.
SCI specifies that the NPT threads conform to ASME B1.20.1.
Reducing Coupling Design
Larger Female Connection
The larger female NPT opening accepts the corresponding larger male-threaded pipe, nipple, fitting, or equipment connection.
Smaller Female Connection
The opposite opening uses a smaller female NPT thread to complete the reduction to the required downstream pipe size.
Direct Inline Size Transition
A reducing coupling combines an inline pipe connection and a size reduction into one fitting. This can reduce the number of separate threaded components required when transitioning between two pipe sizes along the same centerline.
Because both ends are female threaded, verify both nominal connection sizes before ordering.
304 & 316 Stainless Steel Options
304 Stainless Steel
SCI Figure S3114RC identifies the 304 stainless steel reducing coupling. SCI specifies ASTM A351 ACI Grade CF8 for its 304 stainless castings.
316 Stainless Steel
SCI Figure S3116RC identifies the 316 stainless steel reducing coupling. SCI specifies ASTM A351 ACI Grade CF8M for its 316 stainless castings.
NPT Threaded Connections
Both ends use female NPT threads, with different nominal sizes on each end to provide the reducing transition.
SCI specifies NPT threads conforming to ASME B1.20.1. Confirm both mating male NPT sizes and the required flow direction or piping arrangement before installation.
Reducing Coupling vs. Hex Bushing
Reducing Coupling
A reducing coupling uses female NPT connections on both ends and joins two different-size male-threaded components in a straight inline configuration.
Hex Bushing
A hex bushing uses a larger male NPT connection with a smaller female NPT opening and threads directly into a larger female-threaded fitting or component.
Typical Applications
Industrial & Process Piping
- Industrial process piping
- Threaded pipe-size transitions
- Equipment connections
- Utility piping
- Fluid-transfer systems
Commercial & Stainless Systems
- Commercial mechanical piping
- Stainless steel piping systems
- General fluid handling
- Threaded piping modifications
- Compatible male NPT connections
Installation & Selection Considerations
- Confirm both the larger and smaller female NPT connection sizes before ordering.
- Select the appropriate 304 or 316 stainless steel configuration for the intended piping system and process media.
- Verify fitting material compatibility with the operating pressure, temperature, and service conditions.
- Use appropriate thread-sealing practices and avoid cross-threading or excessive installation torque.
- Fully isolate and depressurize the piping system before installing, removing, or servicing threaded fittings.
Use the SCI Heavy Pattern 150# Stainless Fittings catalog to confirm reducing-coupling size combinations, 304 and 316 stainless steel options, part numbers, dimensions, published weights, and NPT thread specifications. The GetPipe.com Common Diameters & Wall Thicknesses chart can also help with related pipe sizing information.
SCI Heavy Pattern 150# Stainless Fittings PDF Pipe Chart Diameters & Wall Thicknesses PDFNeed Help Selecting a 150# Stainless Steel Reducing Coupling?
Our fitting and industrial product specialists can help review your required reducing size combination, female NPT connections, 304 or 316 stainless steel requirements, piping compatibility, and application before you order.
Frequently Asked Questions
What is a reducing coupling used for?
A reducing coupling connects two different-size male-threaded piping components in a straight inline configuration.
What type of connections does this fitting use?
The reducing coupling uses female NPT threaded connections on both ends, with a different nominal size on each end.
What thread standard does SCI specify?
SCI specifies NPT threads conforming to ASME B1.20.1.
Is this part of SCI's Heavy Pattern 150# fitting line?
Yes. SCI lists the reducing coupling as part of its Heavy Pattern 150# Threaded Fittings - Cast family.
What is the 304 stainless steel figure number?
SCI Figure S3114RC identifies the 304 stainless steel reducing coupling.
What is the 316 stainless steel figure number?
SCI Figure S3116RC identifies the 316 stainless steel reducing coupling.
What casting grade is used for 304 stainless steel?
SCI identifies its 304 stainless steel castings as ASTM A351 ACI Grade CF8.
What casting grade is used for 316 stainless steel?
SCI identifies its 316 stainless steel castings as ASTM A351 ACI Grade CF8M.
How is a reducing coupling different from a full coupling?
A full coupling connects two same-size male-threaded components, while a reducing coupling connects two different nominal pipe sizes.
How is a reducing coupling different from a hex bushing?
A reducing coupling has female threads on both ends. A hex bushing has a larger male thread and a smaller female thread.
What should I verify before ordering?
Confirm both nominal connection sizes, female NPT thread requirements, required stainless steel grade, piping arrangement, and intended service conditions before ordering.
Important Ordering & Installation Notes
- This listing is for an SCI Heavy Pattern 150# Stainless Steel Reducing Coupling.
- SCI identifies Figure S3114RC for 304 stainless steel and Figure S3116RC for 316 stainless steel.
- Confirm both the larger and smaller female NPT sizes before ordering.
- Verify the selected stainless steel material is compatible with the intended process media and operating conditions.
- Review the supplied SCI Heavy Pattern 150# catalog and Common Diameters & Wall Thicknesses chart for manufacturer specifications and related pipe-sizing information.
