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Different elastomers for o rings and various applications

An elastomer is a primary raw material used for most o rings. They are typically manufactured as gum rubber or manufactured synthetically, and surprisingly today, there are approximately over 32 different synthetic rubbers now available.  Elastomer compounds will...

Spiral wound gasket thickness – what’s best?

It is often recommended that using a thinner gasket type/material will result in better sealing performance.  Why?  Because thinner gaskets tend to require much less gasket stress to provide applications with the perfect seal, they also have an excellent response to...

Choosing the correct oil seal application

Choosing and using the proper sealing devices within oil and gas applications can be vital when preventing dirt, dust, water, and other debris from potentially getting inside and contaminating products.  Of course, all rubber materials and seals will provide a range...

Nitrile rubber, NBR, and Buna-N – how well do you know your o ring materials?

A widely used elastomer, Nitrile, Buna-N, or NBR rubber, are all oil and fuel resistant and provide a great level of strength, making them a popular material for seals across various industries.  Suitable for a range of applications, this versatile rubber material,...

Optimum squeezing force for an o ring

It is true that the more squeeze you place on an o ring, the tighter the seal it will provide. In essence, the more squeeze (compression) you apply, the greater the force between the o ring and its mating hardware.  And ensuring you have the perfect seal is all...

O Ring Squeeze

The squeeze and shrinkage on an o ring are vital to understanding as these factors stand in the way of your application either experiencing a perfect seal or your application suffering from leaks.  You can measure the shrinkage of an o ring during...

Keeping your o rings bonded

EMI o rings. Those seal ring gaskets are made of silicone compounds, combining environmental sealing with electromagnetic interference protection.  Consisting of metal or metal-coated particles, silicone o rings are filled with silver, silver aluminium, or nickel...

The importance of mechanical seals when reducing water consumption in mining

Environmental considerations are at the top of most industry's agendas in the 21st century as companies evaluate and improve operations, processes, and systems.  Conserving water in mining is one such area that is now being investigated further with the rotation of...

How choosing the correct gasket reduces risks

Health and Safety across any industry are vital, especially so in industrial facilities and settings.  Why?  Because harmful leaks and emissions must be avoided at all costs to avoid serious accidents or injury to your teams and property.  That’s why having the right...

How to tighten your bolts perfectly

How to tighten your bolts and which tools you should use to achieve the perfect seal is not as seamless and straightforward as we would like. Various factors come into play in these situations, such as bolt grade, size, and even application type.  Tightening torques...

What are Ring Type Joints?

What is Ring Type JointsDefinition 

Ring Type joints are made using a Ring Type gasket and Ring Type joint flange. The RTJ flange has a groove on its face. The RTJ gasket fitted into this groove. The bolts are tightened, and this compresses the gasket. The gasket will fill in the gap and so create a very strong metal on a metal seal.  

While these may have raised faces, the faces are to ensure easier accessibility rather than better pressure containment.  

The RTJ is a relatively simple join. Just line up the gasket and ensure that it fits into the groove with dual sealing surfaces. Once that has been done, it’s a simple enough matter – the ring will automatically centre itself as you tighten the bolts.  

Find Out More Here!

Usage 

These advantages of these kinds of joints are: 

  • They are extremely simple to execute, as long as you position them correctly to start off with, sealing the join is simple.  
  • very strong seal is created. This seal will stand up to high heat and high pressure.   
  • You can choose from a range of different metals when it comes to the material the gasket is made of. You can choose a stronger metal in those situations where more demand is placed on the seal. You can also choose the metal that is most resistant to corrosion. 
  • Because the join is metal on metal, the seal will last longer and resist the effects of chemicals passing through it well. 
  • The sealing pressure increases as the pressure used during the process increases. This makes the joint capable of handling not only high pressure but fluctuation pressure as well.  

 The disadvantages of these kinds of joints are:  

  • Moisture and dirt can build up in the groove of the face before it is sealed. This could lead to damage to the sealing surfaces. This, in turn, could make the join more likely to leak.  
  • If you want a strong seal, you have to be sure to align the gasket properly. They have to stay in alignment throughout the whole process cycle. This could become an issue of the metals you are joining are not the same. Say, for example, one metal expands more than the other when heated up. This could cause a misalignment of the seal and potential leaks. 

This kind of join is ideal for high temperature and high-pressure situations where a really strong seal is required. Metallic gaskets do last better when it comes to corrosive chemicals than other types. This makes this an ideal join for chemical processing plants.  

Currently, it is widely used in petrochemical plants, on oil drilling platforms and in oil refineries as well. It is ideal in industries where:  

  • Corrosive chemicals are used.  
  • Temperatures exceed 427° Centigrade. 
  • Fluctuating pressures or high pressures up to 20 000 PSI.  
  • It is easy to carry out maintenance on the joint. If it is regularly cleaned, it will withstand corrosion for a lot longer.  

In general, choosing the right metal for the gasket, and correct flange type will make this a useful join for most industrial processing applications.  

Read the Properties of RTJs here. 

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