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The job of an anti-extrusion ring

O rings perform an essential job supporting various applications. Creating a tight seal between the two housing parts that hold it, o rings help prevent liquids and gases from escaping from an application, preventing any detrimental harm and defects from occurring....

What Gaskets Are Best for High-Pressure Vessels?

When it comes to the choice of gaskets on the market today, it can feel quite overwhelming to know which is the right option to use alongside high-pressure vessels. The pressure in these types of vessels can be extremely dangerous and explosive when they are not...

O-Ring Squeeze Ratios – Everything You Need to Know

If you need to install an O-ring seal, you might be wondering what you need to know about squeeze ratios. Specialist Sealing Products offers a wide range of products for your needs, and we’ll be here to help you when selecting the right design and material for your...

Spiral Wound Gaskets and Their Use in the Power Generation Industry

Within the power generation industry today, there are constant challenges to face. Over the past decades, many changes have occurred in this industry, with different fuels used to produce energy. In order to withstand the high temperatures and the conditions of this...

Shelf life of an o ring

It may seem a surprising topic of conversation, but when it comes to o rings and seals, it's important to note that they do have a shelf life, which, if not monitored and regularly checked, can affect their quality and overall performance.  How and where you store...

What are Encapsulated O-Rings?

When discussing the various o-ring options on offer, you might hear encapsulated o rings being discussed. This type of o-ring offers many advantages to manufacturers, but you’ll want to ensure you understand its proper application before purchasing...

Everything You Need to Know About Large O-Rings

Large O-rings, which are often referred to as giant o-rings, are used in a wide variety of applications. They are primarily needed for jobs where heavy machinery or equipment are used, but you’ll find there are a variety of options on the market when choosing large...

How to Avoid Pipeline Flange Corrosion

Our team is all too aware of the risks of corrosion, but it’s something that you can work to avoid in your home and workplace. Preventing corrosion isn’t always an easy task, which is why it’s such a common problem within buildings in the UK. Visit our homepage for...

O-rings suitable for the pharmaceutical industry

O rings are widely used across various industries to support a variety of different pieces of equipment and applications.  They provide an essential function and are ultimately moulded and manufactured to ensure they provide a continually high level of quality through...

The Best Chemical Resistant Gaskets for Sulfuric Acid

If you are using sulfuric acid on a regular basis within your industry, you might be aware of how corrosive it can be. While it can be useful for dyes, explosives, fertilisers, and many more applications, finding a chemical resistant gasket can often be one of the...

Difference Between Ring Type Joint and Raised Face

Difference Between Ring Type Joint and Raised FaceIntroduction 

If you are new to the industry, you might not know the difference between Ring Type Joint and Raised Face. The difference is actually pretty simple and refers to the type of flange that you need to use when making your join.   

In this post, we will compare RTJ and RF so that you understand the differences more completely. Both types of joins are useful, but each has their own advantages and disadvantages. This post should give you more clarity and help you to identify what projects the different flanges are best suited for.   

 

Differences: Ring Type Joint vs Raised Face

Raised Face 

This is the type most commonly found in processing plants. When you see it, you will be able to recognise it straight away. In this model, the surfaces to attach the gasket to are raised. The bolting circle will always be lower than the gasket surfaces.  

The advantages are : 

  • You can use a wider range of gaskets – from spiral wound types to flat ring sheet types.  
  • As the surface is raised, it is more easily accessible. Replacing a worn gasket is thus a lot easier.  
  • This design enables more pressure to be concentrated onto a smaller gasket area. This, in turn, helps the joint handle pressure containment better.   
  • It is also useful when you need better separation between the two flanges being joined.  

  

Ring-Type Joint  

These are more commonly used in applications where either high pressure or high temperature is an issue. These are Class 600 or more flanges or where temperatures typically exceed 427° Centigrade.  

These flanges can be identified because they have grooves that are cut into their service. A metallic gasket is fitted into these grooves and then compressed to create a solid seal. The gasket is somewhat mangled in the process but fits into space perfectly.  

The advantages are:  

  • Metal to metal seals is made possible. These are a lot stronger and will withstand high heat, pressure and corrosion caused by chemicals.  
  • The grooves allow for a tighter fit and can be useful in situations where space is an issue.   
  • Depending on the type of gasket used, the faces may be in direct contact with one another.  
  • The gasket is not going to compress any more once it has been tightened. This makes it more resistant to movement and vibration.  
  • You have a reduced range of options when it comes to the type of gaskets that you can use. However, if you choose the right type for the job, the seal is highly reliable and strong. 

Conclusion 

As you can see, there are advantages to both types of flanges. You need to use the best design option for your project. It just pays to remember that you should always use the right connections for the best join possible.  

Using an RF connection on an RTJ is a recipe for disaster. It may hold initially, but something is bound to go wrong further down the line with this kind of tinkering.

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