Basic Characteristics and Styles Of Spiral Wound Gasket

Basic Characteristics and Styles Of Spiral Wound Gasket

In this post, we’ll learn to the Basic Characteristics and Styles Of Spiral Wound Gasket

Introduction

The spiral wound gaskets contain a v-shaped strip of metal that is wound into a spiral. therefore it’s referred to as Spiral Wound Gaskets. commonly the metal layers ar separated by a filler, sometimes asbestos. The amphibole provides a decent resilience and sealability property to spiral wound gaskets.

Read:  Basics and Type Of Ring Type Joint (RTJ) Gasket

Basic Characteristic of Spiral wound gaskets

The spiral wound gaskets ar wide employed in moderate to crucial services in varied industries. 

They’re best suited for the applying, wherever the gaskets subject to hot temperature or pressure sport, shock or vibration. These gaskets have the simplest resistance property once compare with different metal and amphibole type gaskets.

Spiral wound gaskets ar used wherever no gasket centering or compression limiting device is needed. additionally employed in metal-to-metal joints and have a decent tolerance for projection surface end irregularities. sealing action of the seal is due to the flow of metal spiral and asbestos fiber as a result of gasket compression.


Spiral-wound gaskets are used for any circular or moderately non-circular applications where an approximate compressed thickness of either 3/32″ or 1/8″ are often tolerated. Excellent performance in joints restricting compression is provided since their resiliency will catch up on modest separation.

Spiral Wound Gasket Thickness and Compression

The compressibility of the gasket is going to be controlled to some extent for a selected bolt loading by varying the density. Two gasket thickness, 1/8″, and 3/16″ are standard and suitable for many applications. 

For 1/8″ thickness gaskets, compression to a thickness of 0.100″ to 0.005″ is suggested. For the 3/16″ thick gaskets, a compression of 0.130″ to 0.005″ is preferable. within the case of non-corrosive services, a minimum of 80% of applications could use type 304 range of -320 to +1000 oF.

Types or forms of Spiral Wound gaskets

They are four forms of spiral wound gaskets are accessible within the market. They are

• Centering gasket ( vogue CG) 
• Centering gasket with Inner ring (Style CGI) 
• Reinforce (Style R) 
• Inner ring with Reinforce (Style RIR)
  

Centering gasket ( vogue CG)

In this type of spiral wound gasket consisting of AN external solid metal centering ring and also the amphibole spiral ring within the solid metal ring. The external ring that accurately centers gasket on flange face. 

 

 Also, give a further radial strength to forestall the seal blow-out and acts as a compression stop. A general-purpose seal appropriate for each flat face and raised face flanges.

This vogue is wide employed in each petrochemical and refinery application.

Centering gasket with Inner ring (Style CGI)

This type is comparable to type CG, however, it, in addition, consists of AN inner ring. As mentioned on top of the outer ring is employed for centering and also the internal ring used as a further compression limiting stop.

The inner ring additionally is a barrier to protect the seal from heat and corrosion and stop the rim erosion. appropriate to be used with a flat face and raised face flanges. it’s a perfect seal for vacuum services.

Reinforce (Style R)

It is a basic configuration of spiral wound gasket. during which the Inner and outer diameters are strengthened with many plies of metal while not filler to provide larger stability and higher compression and protection characteristics.

This kind of seal is employed for tongue and groove, male and feminine sort joint of flanges. this kind of gasket is additionally used for protecting the pump casing joint and valves bonnet and body fixing joints.

Inner ring with Reinforce (Style RIR)

This type of the seal, the solid inner metal ring acts as a compression stop and fills the doughnut-shaped area between flange bore and also within the diameter of the gasket. it’s designed to forestall accumulation of solids, cut backflow of method fluids and minimize erosion at rim faces.

Suitable for male and female pipe flanges

Temperature Limits Of gasket Metal Rings and Color cryptography

Advantages of Spiral Wound gasket

The spiral wound style is most well-liked as a result of it makes a decent all-spherical gasket. It will alter for temperature changes, shock, and vibration, and may be used at fairly high temperatures and pressures. 

Besides the multiple protection actions of the metal edges, the filler compresses below the bolt load to create another barrier against the leak. It will so fill minute imperfections within the flange faces, whereas the spring action of the metal helps to form and maintain a decent seal.

Spiral wound gaskets are accessible in wide selection of materials for varied services