Stainless Steel Double Ferrule
Tube Fittings Manufacturer in China
- • 316 / 316L Stainless Steel
- • Two-Ferrule Compression Design
- • OEM & Bulk Supply for Distributors
- • Swagelok Compatible
What Are Stainless Steel Double Ferrule Tube Fittings?
Product Overview
Stainless steel double ferrule tube fittings are precision compression fittings designed for secure, leak-free connections in high-pressure instrumentation systems.
The two-ferrule compression design features a front ferrule for primary metal-to-metal sealing and a back ferrule for strong tube gripping. When tightened, both ferrules compress simultaneously, ensuring vibration resistance, pressure stability, and long-term reliability in demanding gas and fluid applications.
Typical Technical Characteristics
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Material: 316 / 316L Stainless Steel
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Design: Two-Ferrule Compression System
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Tube Size Range: 1/8" - 2" (3mm - 25mm)
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Pressure Capability: Suitable for High-Pressure Systems
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Sealing Type: Metal-to-Metal Seal(Bite into the Tubing)
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Applications: Instrumentation, Gas & Fluid Control
Types of Stainless Steel Double Ferrule Tube Fittings
Available in Straight, Elbow, Tee, Bulkhead, and Custom Configurations
Double Ferrule Tube Union Fittings
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Straight Union
- Pressure: Up to 6000 PSI
Double Ferrule 90° Elbow Union
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: 90° Elbow
- Application: Chemical Processing
Compression Tee Union
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Tee Union
- Ports: 3-Way Connection
Compression Bulkhead Union
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Bulkhead Union
- Mount: Panel Mounting
Double Ferrule Male Connector
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Male Connector
- Thread: NPT, BSPT
Double Ferrule Female Connector
- Material: SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Female Connector
- Thread: NPT, BSPT
Double Ferrule 90° Elbow Adjustable
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Adjustable
- Thread: SAE ORB, BSP
Compression 45° Elbow
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: 45° Elbow
- Thread: NPT, BSPT
Stainless Double Ferrule Cross Union
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Cross Union
- Ports: 4-Way Connection
Double Ferrule Compression Plug
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Cap & Plug Set
- Use: System Sealing
Double Ferrule Compression Nut
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Tube Nut
- Use: For Tube Fittings
Compression Sleeve/Ferrule
- Material: SS 304, SS 316L
- Size: 1/8"- 2"/ 4mm - 25mm
- Type: Ferrule Set
- Use: For Tube Fittings
Technical Specifications of Double Ferrule Tube Fittings
Double ferrule instrumentation tube fittings are precision stainless steel compression fittings designed for secure, leak-free connections in high-pressure instrumentation and process control systems.
Each fitting assembly consists of four key components:
Fitting Body
Precision-machined housing designed for dimensional accuracy and system integration.
Nut
Applies axial force to compress the ferrules and secure the tube assembly.
Front Ferrule
Creates the primary metal-to-metal seal by swaging onto the tube surface.
Back Ferrule
Provides strong mechanical grip and prevents tube pull-out under pressure and vibration.
This two-ferrule compression design ensures consistent sealing performance, vibration resistance, and long-term reliability in demanding industrial environments.
Applications of Stainless Steel Double Ferrule Tube Fittings
Stainless steel double ferrule tube fittings are widely used in high-pressure instrumentation and fluid control systems where leak-free sealing, vibration resistance, and long-term reliability are critical. Their precision two-ferrule compression design makes them suitable for demanding industrial environments.
Typical Application Industries:
- Oil & Gas Instrumentation Systems
- Chemical & Petrochemical Processing Plants
- Power Generation & Energy Facilities
- Hydraulic & Pneumatic Control Lines
- Process Automation & Control Panels
- Marine & Offshore Equipment
- High-Purity Gas & Semiconductor Systems
- Food & Pharmaceutical Processing
Frequently Asked Questions
What is a double ferrule tube fitting?
A double ferrule tube fitting is a stainless steel compression fitting that uses two ferrules -- a front ferrule for primary sealing and a back ferrule for tube gripping. This design provides leak-free performance and strong mechanical retention in high-pressure instrumentation systems.
What is the difference between double ferrule and single ferrule fittings?
Double ferrule fittings use separate ferrules for sealing and gripping, offering improved vibration resistance and more reliable reassembly compared to single ferrule compression fittings. They are commonly used in critical gas and fluid control applications.
What materials are available for double ferrule fittings?
Our double ferrule tube fittings are available in 316 and 316L stainless steel, providing excellent corrosion resistance and durability for demanding industrial environments.
What pressure rating can double ferrule fittings handle?
Pressure ratings vary depending on tube size and material, but stainless steel double ferrule fittings are suitable for high-pressure applications, typically up to 6000 PSI or higher depending on configuration.
Are double ferrule fittings reusable?
Yes. When properly installed, double ferrule compression fittings can be disassembled and reassembled while maintaining sealing performance, making them suitable for maintenance and system modifications.
What industries commonly use double ferrule tube fittings?
They are widely used in oil & gas, chemical processing, power generation, instrumentation systems, hydraulic control lines, and high-purity gas applications.
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