All you need to know about Instrumentation Tube Fittings

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All you need to know about Instrumentation Tube Fittings

Instrumentation tube fittings are mainly used for stopping leakage and to making it leak-proof. In various instrumentations, they are used for torque for seal also. The usage is not limited to these, but there are many reasons they are widely used in different instrumentation and many areas.

Hydrox Fittings formerly known as “A. R. Engineering” is Manufacturer, Supplier, and Exporter of Instrumentation / Tube Fittings, Instrumentation Valves in Mumbai.

It brings rich engineering experience of more than one and a half decades and trained, qualified staff, and the latest machinery.

Our instrumentation tube fittings are used for process tube connections also. The products will help in stopping all types of costly leakage. With the international standard fittings available at affordable prices clients can be assured of the best performance and value for money.

Types of Instrumentation tube Fittings

Instrumentation Tube fittings are available in four different types. They are primarily distinguished by their applications and end connections. Each of the fittings has its own drawbacks and benefits. Therefore, one has to study the requirement specs before choosing a particular type of instrumentation tube fitting.

Cone and Thread Fittings

Cone and Thread (C&T) fittings are useful in high-pressure applications.  But they can be used in moderately pressure applications as well. These tubes are coned and countersunk into the fitting. Thus, a secure connection is established.

It is important to have precision-shaped tube endings and fine surface finish and threads. Thus, tubes are assembled tightly against the junction. They fit closely, hence, they are useful where the pressure of the fluid is more.

Butt Weld Fittings

A butt weld fitting is a vibration-absorbing assembly. Since the metals are bonded permanently, a well-formed butt weld has the best resistance to vibration and fatigue. A butt weld fitting connection is an expensive of the three basic types of instrumentation fitting assemblies.

Compression Fittings

Compression fittings are the easiest to use. They are most frequently used. The three components of this fitting are the nut, body, and ferrule. These fittings have a secure hold on the surface. They do not need any specific equipment or tool.

Compression fittings are the least pricey overall assembly due to their ease of installation.

Push-To-Connect Pneumatic Fittings

As the name suggests, Push-to-connect fittings have an internal collet and an external push button that connect tubing. These fittings allow for instant connections without the use of tools. Even the disconnection is just as simple.

Advantages of Instrumentation Tube Fittings

  • Double ferrule compression fittings ensure that the body threads do not gall.
  • These fittings offer great corrosion resistance.
  • The bodies of these fittings can be measured.
  • Instrumentation tube fittings offer zero leakage under a full range of demanding operating circumstances.
  • The fittings have excellent corrosion, high pressure, and extreme temperature resistance.
  • Since instrumentation tube fittings are simple to use, they can save time and money on maintenance.
  • These fittings are reusable.
  • Through their leak-proof fitting joints can endure high-pressure vacuum and vibration operations.
  • Compression fittings with two ferrules can be successfully used for low-torque applications.


Low torque assembly
Available in material SS316, Inconnel, Monel, Duplex etc.
Positive leak-free seal
Variety of end connections
Internally silver plated nuts
Peak of back ferrules are case hardened


Instrumentation and Tubing system
Low & Medium pressure instrument lines

Also Read: Difference Between Pipe Fitting and Tube Fitting

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