Pipe Fittings Hex Reducing Couplings – Female NPT – 1/4", 3/8", 1/2", 3/4", 1" – 10000 PSI – ASME B1.20.1 / SAE AS71051 / ISO 7-1 / ISO 228
Pipe Fitting
Also known as:
Pipe Connectors, Piping Fittings, Fittings


Pipe Fittings Hex Reducing Couplings – Female NPT – 1/4", 3/8", 1/2", 3/4", 1" – 10000 PSI – ASME B1.20.1 / SAE AS71051 / ISO 7-1 / ISO 228
Pipe Fitting
Also known as:
Pipe Connectors, Piping Fittings, FittingsBuy
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Hex Reducing Couplings Female NPT connect pipes of different sizes securely for high-pressure instrumentation and process systems.Sign in
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Executive Summary
Hex Reducing Couplings Female NPT are pipe fittings designed to join two pipes of different sizes in instrumentation and process systems. They provide a reliable, threaded connection that maintains system integrity under high pressures up to 10,000 PSI.
These couplings are available in sizes 1/4, 3/8, 1/2, 3/4, and 1 inch, making them suitable for a variety of piping configurations. The hex design allows easy installation and tightening with standard tools, reducing the risk of leaks.
Commonly used in the oil and gas industry, these fittings are essential for connecting pipelines in systems where precise size adaptation and secure sealing are required.
Technical Specifications
Size Range | 1/4” to 1” |
Material | SS 316, Brass, Carbon Steel |
Temperature Range for Ratings | -28 to 37°C (-20 to 100°F) |
Pressure Ratings | Based on ASME B31.3 at ambient temperature |
Thread Engagement Standard | ASME B1.20.1 for NPT threads |
Internal Surface | Burr-free |
Cleaning | Free from machine oils, loose particles, grease |
Type | Instrumentation and Process Control |
Thread Protection | Capped and properly packed |
Recommended Seal | PTFE tape for male tapered threads |
Features and Benefits
- Standardized compliance ensures consistency and traceability.
- Maintains proper flow and pressure across connected pipelines.
- Manufactured from high-quality materials for durability.
- Hex shape allows easy tightening with standard tools.
- Female NPT threads provide a tapered, leak-tight seal.
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Detailed Description
Hex Reducing Couplings Female NPT are precision pipe fittings designed to connect two pipes of different sizes while maintaining a secure, leak-tight connection. The female NPT threads provide a tapered seal that ensures a tight fit when connected to a male NPT thread, making them suitable for high-pressure systems up to 10,000 PSI. The hex shape of the coupling allows for easy tightening with standard tools, providing both convenience and reliability during installation.
Reducing couplings are specifically used when there is a need to transition between different pipe sizes in a system, allowing for flexibility in design and modification of existing pipelines. They help maintain proper flow rates, pressure, and system integrity without the need for custom fittings. This makes them essential in oil and gas systems where varying pipe sizes are common.
These couplings are manufactured from high-quality materials and are compliant with recognized standards, including ASME B1.20.1, SAE AS71051, ISO 7-1, and ISO 228, ensuring consistency, traceability, and durability in demanding applications. Hex Reducing Couplings Female NPT are ideal for situations where space is limited and a reliable connection between different pipe sizes is required, supporting both operational safety and system efficiency.
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