Spiral Wound Gasket | How to Manufacture And Its Uses

spiral wound gasket

The most typical metallic gasket used in industrial settings with a wide range of pressure and temperature conditions is a spiral wound gasket. They are commonly employed to stop leaks at flange joints in the gas and oil, electrical, chemical, food, and petrochemical industries. In order to accommodate US refinery activities requiring high pressure and temperature changes, Flexitallic created the spirally coiled gasket in 1912.

Widely Use For Various Applications

  • High-Pressure Applications
  • Hydrogen
  • Fluids that are Flammable
  • Fluids that are corrosive
  • Applications for Hydrogen-temperature services

Parts of Spiral Wound Gasket

A semi-metallic gasket is one that is spiral coiled. It is made with filler material that is both non-metallic and metallic and is spirally twisted into a v-shape. There are three major components to a spiral wound gasket. These are what they are:

  • Inner Ring: 

A spiral wound gasket’s inner ring is crucial as it keeps the inside pipe from bending. A gasket that bends causes bits to be drawn into the pipe and eventually migrate through the piping system, where they finally become stuck or wrapped around something. Inner rings prevent this situation and lower the likelihood of this issue.

  • Outer Ring:

A spiral-wrapped gasket’s outer ring sometimes referred to as a centering ring or guide ring, is frequently made of carbon steel. The main job of this component is to fit the gasket into a bolted flange joint while centering the gasket.

  • Sealing Element:

The Flexitallic spiral wound gasket’s portion that creates a tight seal to prevent leaks is located here. Both filler and windings material is a part of the sealing assembly. Typically, flexible graphite filler material that resists high temperatures are used to create spiral wound gaskets. Using graphite as a filler material also helps the gasket prevent joint movement and flange deformation. Another well-liked filler substance is PTFE (Polytetrafluoroethylene). However, high-temperature conditions are not suitable for using PTFE. The most widely used winding materials are Monel and stainless steel.

How Spiral Wound Gasket Manufactured

By winding alternate strips of metal and filling material over an inner ring composed of specialized steel, spiral-wrapped gaskets are created. Although flexible graphite, stainless steel, and carbon-rich materials are the basic building blocks, these materials can be altered depending on a number of conditions. Chemical compatibility, corrosiveness, fluid concentration, material cost, and operating temperature are the primary determinants of which materials should be utilized. 

Spiral wound gaskets are best suited for fluctuating and bolt loads since they rely on the mechanical properties of a produced metal spiral strip. If you want the spiral to operate effectively and for a long time, you must be careful not to overcompress it. The finished gasket features metal and filler spirals that alternate.

Uses of Spiral Wound Gasket

The most diverse range of working temperature and pressure conditions is supported by semi-metallic gaskets or spiral-wrapped gaskets. They are utilized in groove and tongue, raised face, and female and male flanges. In pressure -temperature and high-pressure situations, they are also employed trustworthily.


Hopefully! This piece of information is beneficial for you. If you want to know more about spiral wound gaskets, get in touch with professionals. They will help you in giving every detail about the gaskets.

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