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Threaded Flange

Threaded flanges are probably the most recognisable of all flanges due to their screw thread design that is used to connect it to the pipe. Threaded flanges, also known as screwed flanges (for obvious reasons), require a male and female thread to create a connection...

Slip On Flange

A slip-on flange can also be known as a hubbed flange, which, as the name suggests, has a hub with a very low profile. Why is this important? Because this type of ring type joint gasket has an internal diameter larger than the connecting pipe, allowing you to slide it...

Weld Neck Flange

Also known as tapered hub flanges or high hub flanges, weld neck flanges are a specific type of gasket with a protruding ridge and long neck used to connect pipework and provide you with a high-quality seal. Weld neck flanges, in particular, are a popular choice when...

Nitrile vs Viton® – What is the Difference?

As you start to make a decision about what type of O-rings to purchase for your business, you might wonder what material is the most suitable for your unique needs. Every business operation has different requirements for their O-rings, such as the temperature,...

Aflas vs Viton

When it comes to choosing O ring suppliers in the UK, you’ll find that there are a wide range of materials on offer for you to choose from. Many people find that the options can seem quite overwhelming, with some materials having similar properties but offering...

EPDM Gasket

Both the automotive and construction industries have started to use EPDM gaskets more frequently in recent times. This rubber material is UV light resistant and has many fantastic properties that make this part highly effective for a wide range of processes. Keep...

Metal Gaskets

When comparing gaskets for use within your business processes, you’ll find that these can be made from a variety of materials. Metal gaskets are a very popular option, offering many advantages over other materials. When looking at sealing product options, make sure...

AFLAS o ring

O rings come in many different dimensions, thicknesses, and materials. And it is the various different materials that o rings can be manufactured from that make each o ring unique and suitable for specific applications. In fact, there are hundreds of different types...

O Ring Vulcanization Process

With years of o ring knowledge and experience in o ring vulcanization, we're one of the leading experts in providing the right sealing solution for you. To view our full range, visit our O-ring product page, with a wide selection and something to match every...

What is a Window Seal?

A window seal is something that nearly all of us will have seen in our homes or workplaces and is designed to help make your building more comfortable. Within our range of Sealing Specialist Products, we offer a selection of window seals designed for various...

See our latest catalogue for all the services we offer.

Kinds of Spiral Wound Gaskets

Different kinds of gasktetsSpiral wound gaskets are made from winding the strips of metal as well as filler material. The winding material and filler are changed according to the needs of chemical characteristics and compatibility. Spiral wound gaskets are mainly divided according to the materials used in them. There are different kinds of spiral wound gasket material that you may come across. Go through following details to explore what each one of those has got:

What are the Different Kinds of Spiral Wound Gaskets

Metallic gaskets

These are made from the different combinations of metal in specific size and shape. Lens rings gaskets and ring joints gaskets are the ones that usually fall under this type. These are more suitable for high temperature and extreme pressure applications. To seal them, they need high bolt load that facilitates sufficient deformation. Metallic gaskets have a tremendous ability to handle sudden fluctuations in pressure and temperature. It can withstand the pressure limit of up to 10,000 psi, but it also means that there will be hardly any compression. The bolt force creates an extreme pressure on seal interface that allows the gasket metal to flow into the flange material structure thereby producing a tight seal.

The common problem that metallic gaskets face is that they are highly susceptible to the galvanic corrosion. However, this issue can be overcome by keeping gasket material very close to the flange material.

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Semi-metallic gaskets

These kinds of gaskets play an important role to curtail the gap between metallic gaskets and non-metallic gaskets. These are mainly manufactured from the metallic and non-metallic material as a result of that they possess features of both the materials. The metallic part gives sealability, while the non-metallic portion offers resilience and strength. Semi-metallic gaskets are manufactured to tolerate any form of the condition that involves extreme pressure and high temperature.

The winding material selection is made by fluid concentration, cost of the material, corrosive nature and operating temperature. Stainless steel 321, 316 and 304 is a frequently used material for winding. In some of the cases, alternative materials can be used. Graphite and asbestos are also used as general filler material, but in extreme temperature conditions, graphite is a most preferred choice. Gaskets feature outer ring manufactured from the carbon steel material to achieve precise positioning. In case of exceptional applications, they also come with the inner ring. To produce best results, the process fluid and ring material must be compatible with each other.

Non-metallic gaskets

These are manufactured from the materials which are easy to compress such as silicone, PTFE, graphite, NBR, etc. They can resist the corrosion but only up to the limited temperature. Non-metallic gaskets have many restrictions when it comes to the high-pressure conditions. Flat ring gasket form can be used with raised face flanges, while full face gasket is easy to go with flat face flanges.
The difference between the kinds of spiral wound gaskets mentioned above will definitely help you to pick a right type of gasket according to your requirement. So go ahead, make an informed decision and order your chosen gasket here.

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