ferrule fittings 304/316 Stainless Steel 10mm Double Ferrule Compression Tube Fittings with Different Size

  Ferrule fittings are an essential component in various industries where fluid or gas transportation and containment are of utmost importance. These fittings are known for their reliability, ease of installation, and ability to create leak-tight seals in demanding environments.

This article will delve into ferrule fittings, exploring their types, working principles, advantages, applications, installation procedures, maintenance, troubleshooting, and more.

Comparing Double Ferrule Fittings and Single Ferrule Fittings

This article looks at the differences between single and double ferrule tube fitting designs and how each one fits a unique purpose.

             Compression fittings consist of three core components: a compression nut, a ferrule or ferrules, and a body。

One ferrule fittings and valves have a similar make-up, supplementing one large ferrule in place of two smaller ones. Tube fittings with one ferrule are called single ferrule fittings. Comparably, fittings with two ferrules are called double ferrule fittings. 

To this day, there are two options to choose from when deciding on the best ferrule design for your application. We’re going to dig further into these two options to help inform your decision.

What’s the difference?

If you’re working with a single ferrule fitting:

Initially, the shoulder inside a compression nut engages with the back-end of the ferrule as it's tightened. Under this force, the angled front-end of the ferrule compresses into the body and grips the stainless steel tube. This back-end ferrule compression action protects the front of the single ferrule in an attempt to isolate tube vibration from affecting the front end tube bite.

If you're working with a double ferrule fitting:

In the double ferrule, or twin ferrule design, the front ferrule is the larger piece that sits deepest in the body. The back ferrule, is smaller and engages with the nut. The front ferrule is a softer metal and bites down between the tube and the fitting body creating the seal for the double ferrule technology. The back ferrule has a chemically hardened lead edge. This hardened portion is then able to bite down into the softer metal of the tubing, providing grip. The gripping action keeps the tubing from slipping under pressure, which could be dangerous.

Why are ferrules important?

Much care goes into the design of both single and double ferrule designs. Both styles are highly-engineered and designed with metal property science, called metallurgy, to provide accurate grip and seal. These actions, provided by the ferrule(s), are the most important functions when it comes to surviving pressure, temperature, and vibration. Loss of seal and tube blowout are two of the main concerns if ferrules don’t perform correctly.

Choosing between Single Ferrule and Double Ferrule:

Double ferrule fittings have become the preferred option over single ferrule fittings in recent years. However, there are a few advantages of each to be aware of before choosing between the two.

Double Ferrule Advantages

The Advanced Technology

The two-piece, double ferrule product incorporates a better sealing technology than the single ferrule system. As discussed earlier, both pieces have their specified roles to create the ultimate sealing product. Because of this, double ferrule fittings are the more advanced product of the two. The “double seal” advantage on stainless steel tubing creates a highly-efficient seal that the single ferrule product can’t compete with.

Better Choice for High-Pressure Applications

In addition to their better design, the double ferrule system is the preferred choice for high-pressure applications. Because of their ability to provide tight seals, double ferrule designs are ideal for tasks such as sealing off high-pressure gas systems.

Single Ferrule Advantages

Installation Safety

Because of the piece count, using one-piece compared to using two pieces is an advantage, in itself. When installing a single ferrule to the body, there's only one way a person can install it incorrectly. However, if you’re using the double ferrule method, there are more than 11 ways a person can incorrectly install the ferrules. One of these ways includes a chance that one of the two-part pieces could go missing, leaving only one piece to be installed into the body incorrectly. Unfortunately, back ferrules commonly go missing. They're also easy to insert facing the wrong direction. Without both pieces inserted correctly, double ferrule fittings will not grip or seal correctly.

Better Choice for Vibration, High Pulsation Applications

Many compression fitting applications have high-vibration and pulsation factors to consider.

The single ferrule has a compressed, light back-end grip which dampens vibration by isolating the seal point on the front end of the ferrule. Vibration can then flow from the back of the ferrule and through the nut/body of the assembly with less interference on the gripping action on the front end of the ferrule. Single ferrule handles these applications well because of this specific back-end compression.

In double ferrule fittings, vibration and pulsation can affect the seals by allowing stress from these instances to concentrate at the non-isolated back ferrule grip. Subsequently, double ferrule fittings have a slight disadvantage compared to the single ferrule for these vibration and pulsation applications.

Tube Fittings and Adapters

Qunrong manufactures a wide range of tube fittings and adapters that provide leak-tight connections and can stand up to high pressures and temperatures. Not only are they easy to install, but they also come in a wide variety of shapes, sizes, styles, and materials— including carbon steel and stainless steel.

Our high-quality and easy-to-use tube fittings, such as JIC fittings, NPT fittings, O-Ring Boss fittings, Weld fittings, nuts, caps, plugs and more, are what you need for the most demanding applications. Explore our large selection of fittings and adapters now.

Flareless Bite Type

Like tube fittings, SAE flareless bite type tube fittings are comprised of a nut, ferrule, and body and creates a seal with the tube by pushing the ferrule’s cutting edge into the tube wall. They are used on medium to heavy walled tubing, and as the name implies flareless fittings do not require a flaring operation yet provide a leak proof seal and a high resistance to vibration. Qunrong manufactures a wide range of steel and stainless steel flareless bite type fittings for your applications which meet or exceed the highest performance standards.

Our high-quality and reliable flareless bite type fittings prevent leaks and reduce torque to ensure a safe and efficient system. Review our large selection of flareless bite types now.

Flareless Bite Type Tube Union

For seamless, high-pressure connections, the Flareless Bite Type Tube Union offers a robust solution. Made from high-pressure carbon steel and coated with zinc trivalent anti-corrosion material, this tube union conforms to the J514 standard. It comes fully assembled with tube nuts and ferrules and is perfect for connecting tubes of the same dimensions without the need for flaring.

Material:SS

Shaping:Forged

Standards:J514

Flareless Bite Type Tube x NPT Male Straight Adapter

Flareless Bite Type Tube x NPT Male Straight Adapter

For seamless, high-pressure connections, the Flareless Bite Type Tube Union offers a robust solution. Made from high-pressure carbon steel and coated with zinc trivalent anti-corrosion material, this tube union conforms to the J514 standard. It comes fully assembled with tube nuts and ferrules and is perfect for connecting tubes of the same dimensions without the need for flaring.

Female Male Thread, BSPP/BSPT/ Metric/NPT SS304 SS316 FORGED  threaded Fitting Hex Nipple hydraulic fittings hydraulic adapters

High Quality Stainless Steel Threaded Fittings

High quality raw materials: We only use top quality stainless steel materials from reputable suppliers to ensure that the chemical composition and mechanical properties of the materials meet strict industry standards.

Advanced Manufacturing Process: We have advanced manufacturing equipment and processes, including precision cutting, bending, CNC manufacturing, etc., to ensure the dimensional accuracy and surface finish of our products. Strict

Quality Inspection: Each product undergoes strict quality inspection before leaving the factory to ensure that the product meets your needs and meets the industry standards.

Comprehensive services

Pre-sales service: understand your specific needs, customize the best solution for you, we have a professional technical team to provide you with comprehensive technical advice to solve your difficult problems in the design, processing and installation process.

In-sale service: customized production according to your drawings and requirements, professional production team to ensure a quick response to your order, we strictly implement the production process and quality control to ensure that each product meets your standards.

After-sales service: Provide 24/7 after-sales technical support to solve any problems you encounter in the process of product use.

Material

ASTM

Stainless steel(ASTM A403 WP304,304L,316,316L,321. 1Cr18Ni9Ti, 00Cr19Ni10,

00Cr17Ni14Mo2,  ect.)

Surface

Transparent oil, rust-proof black oil or hot galvanized.

Applications

Petroleum, chemical, machinery, boiler, electric power, shipbuilding, construction, etc

Warranty

We guarantee 1 year product quality

Delivery time

7 after receipt of advanced payment ,Common size large quantity in stock  

Payment term

T/T, L/C, D/P