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Home > Construction & Decoration > Pipe Fittings > Other Pipe Fittings > 3/8" NPT to 3/4" OD Double Ferrule Connector 316L Stainless Steel Pipe Fitting

3/8" NPT to 3/4" OD Double Ferrule Connector 316L Stainless Steel Pipe Fitting

Product Spotlights

Ensure leak-free, high-pressure connections with this 316L Stainless Steel Double Ferrule Connector. It bridges 3/8" NPT male threads to 3/4" OD tubing, offering superior corrosion resistance, vibration tolerance, and a reliable metal-to-metal seal. Ideal for instrumentation, hydraulics, and pneumatics, it simplifies installation, reduces maintenance, and enhances system safety and longevity in demanding industrial environments.

Negotiable MOQ: 500 Pieces (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Other, 316L Stainless Steel

Connection Type:

Double Ferrule Compression

Male Thread Size:

3/8“ NPT

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Shanghai Quanbao Electronic Materials Technology Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

7 days

Product Details
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Material Other, 316L Stainless Steel

Connection Type Double Ferrule Compression

Male Thread Size 3/8“ NPT

Tube OD Size 3/4“ OD

Pressure Rating Up to 6000 psi (subject to system)

Temperature Range -60°F to 450°F (-51°C to 232°C)

Application Instrumentation, Hydraulic, Pneumatic Systems

Surface Finish Smooth, corrosion-resistant finish

Sealing Mechanism Front and back ferrules create leak-tight seal

Shanghai Quanbao Electronic Materials Technology Co., Ltd., a trusted supplier based in Shanghai, China, specializes in high-performance fluid system components. Our precision-engineered 3/8" NPT to 3/4" OD Double Ferrule Connector in 316L Stainless Steel represents a critical solution for industries demanding leak-free, high-pressure connections. This fitting is designed to bridge the gap between threaded NPT ports and metric or imperial tubing systems, ensuring superior reliability in challenging environments. Engineered for seamless integration and long-term performance, it addresses the core need for secure, maintenance-free fluid transfer connections in critical applications.

Core Features & Advantages:

Exceptional Leak Integrity: The double ferrule design (front and back ferrule) provides a superior, permanent, leak-tight seal. The front ferrule creates a strong grip on the tube, while the back ferrule provides enhanced mechanical strength and vibration resistance.
Premium 316L Stainless Steel Construction: Offers outstanding corrosion resistance, especially against chlorides and acidic environments, making it ideal for chemical processing, marine, pharmaceutical, and food & beverage applications. The low carbon content minimizes carbide precipitation during welding.
High-Pressure Capability: Robust design allows reliable operation in systems with pressures up to 6000 psi (dependent on overall system design and tubing specifications).
Wide Temperature Tolerance: Maintains performance integrity across a broad operating range from -60°F (-51°C) to 450°F (232°C), suitable for diverse process conditions.
Vibration & Shock Resistance: The mechanical grip of the ferrules provides excellent resistance to vibration fatigue and system shocks, preventing loosening and leaks over time.
Reusable & Easy Assembly: The nut and body can be reused multiple times. Installation requires only standard wrenches – no special flaring or soldering tools are needed, significantly reducing installation time and cost.
Reduced Turbulence: Smooth internal bore minimizes pressure drop and turbulence within the fluid stream, enhancing system efficiency.

Technical Specifications:

Attribute	Specification
Material	316L Stainless Steel
Connection End 1	3/8" NPT Male (Tapered Thread)
Connection End 2	3/4" OD Tube (Double Ferrule Compression)
Max Working Pressure	Up to 6000 psi (System Dependent)
Temperature Range	-60°F to 450°F (-51°C to 232°C)
Seal Type	Metal-to-Metal (Ferrules/Tube/Thread)

Benefits for Your Operations:

Enhanced System Reliability: Minimize costly downtime and safety hazards caused by leaks.
Reduced Maintenance Costs: Durable construction and reliable sealing translate to less frequent replacements and repairs.
Improved Safety: Secure connections are critical in high-pressure and hazardous fluid applications.
Compatibility: Connects standard NPT threaded ports to widely used 3/4" OD tubing (stainless steel, copper, etc.).
Long Service Life: 316L SS provides excellent resistance to corrosion and wear, ensuring longevity even in harsh conditions.

As a dedicated manufacturer in Shanghai, China, Shanghai Quanbao Electronic Materials Technology Co., Ltd. leverages stringent quality control processes throughout production. Our commitment to precision machining and material integrity ensures every fitting meets the demanding requirements of global industrial applications. We understand the critical nature of fluid system components and stand behind the performance of our 316L Stainless Steel Double Ferrule Connectors. Experience the difference that reliable, high-quality fittings make in your system's efficiency and safety. Contact Shanghai Quanbao today to discuss your specific requirements, request samples, or place an order for this essential component.

Frequently Asked Questions (FAQ):

Q: What is the advantage of a double ferrule vs. a single ferrule design?
A: Double ferrule fittings provide a more reliable, leak-tight seal with superior resistance to vibration and thermal cycling. The two ferrules work together: the front ferrule grips the tube and creates a primary seal, while the back ferrule provides additional mechanical support and enhances vibration resistance.
Q: Is 316L Stainless Steel necessary, or can I use 304/304L?
A: 316L offers significantly better corrosion resistance, particularly to chlorides and acids, compared to 304/304L. For applications involving seawater, chemicals, or high chloride environments, 316L is strongly recommended for long-term reliability.
Q: Can this fitting be used with tubing materials other than stainless steel?
A: Yes, double ferrule compression fittings are compatible with various hard tubing materials, including stainless steel, copper, copper-nickel, and some types of plastic tubing (ensure compatibility with pressure/temperature). The key requirement is that the tubing OD matches the fitting size (3/4" OD).
Q: How many times can I reuse this fitting?
A: The fitting body and nut are designed for reuse. Typically, you can disconnect and reconnect the fitting several times on the same tube end (if the tube end is undamaged). The ferrules, however, are designed for a single use on a specific tube end. Always use new ferrules when reassembling or connecting to a new tube end.
Q: What is the proper installation procedure?
A: 1) Cut tube square and deburr. 2) Slide nut onto tube, then slide back ferrule, then front ferrule onto tube. 3) Insert tube into fitting body until it bottoms. 4) Finger-tighten the nut. 5) Mark the nut. 6) Using two wrenches, tighten the nut 1-1/4 turns (this is a common guideline; always refer to the manufacturer's specific instructions if provided).
Q: What type of sealant is needed for the NPT threads?
A: NPT threads require a sealant (thread tape or liquid thread sealant) applied to the male threads to fill the gaps and create a leak-tight seal. Ensure the sealant is compatible with your fluid and pressure/temperature.
Q: Is this fitting suitable for oxygen service?
A: While 316L SS is often used in oxygen systems, fittings for oxygen service require extremely rigorous cleaning (oxygen cleaning) to remove all hydrocarbons and contaminants to prevent combustion hazards. Verify specific cleaning requirements and compatibility standards (like CGA G-4.1) for oxygen use.
Q: Can I get this fitting in different sizes or configurations?
A> Yes, Shanghai Quanbao typically offers a range of sizes and configurations (e.g., different NPT sizes, different tube OD sizes, elbows, tees, bulkhead fittings). Please inquire about specific requirements.