CGI Spiral Wound Gasket
Flexitallic Gasket Company invented the spiral wound gasket in 1912. By now, spiral wound gaskets play a role in oil and gas pipelines, as well as other important industry applications. As the manufacturer of this type of gasket, we keep delivering our gaskets to the world markets with our sincere service and best quality.
By reading the following content, you will know much knowledge and information about CGI spiral wound gasket.
Welcome to Learn about CGI Spiral Wound Gasket
CGI spiral wound gasket has a sealing element; at the same time, it has an inner and outer metal ring. Therefore, the sealing element is present in both the internal and external diameters. The inner ring functions as an additional compression stop and prevents inner buckling of the sealing element. The inner ring is typically made from the same material as the winding sealing element but can be produced in other alloys depending on service.
In the following text, we will know more about CGI spiral wound gasket, such as its application, the difference between CG type, advantages, outer guide ring color code, dimensions, gasket construction and so on
Who Invented Spiral Wound Gasket?
Flexitallic Gasket Company invented the spiral wound gasket in 1912. The industry’s need for an improved, safe, and effective sealing solution for increasingly demanding applications was established in Camden, New Jersey, by German immigrant Mr. Henry Bohmer.
CGI Spiral Wound Gasket Construction
The CGI spiral wound gasket has 3 parts: Winding sealing elements, inner ring and outer metal ring
Winding Sealing Elements
The winding sealing element is usually a spirally wound V-shaped stainless steel strip and a non-metallic filler material, such as graphite or PTFE.
Inner Ring
Almost all the inner ring material is same as the winding sealing elements
Guide or Outer Centering Ring
The outer ring is mostly painted carbon steel, but it also can be stainless steel, like SS304 and SS316.
The Difference between Spiral Wound Gasket CGI and CG
The difference is so clear, as the CG spiral wound gasket just has the sealing element and outer ring, while the CGI spiral wound gasket has both an inner and outer ring.
Application
The CGI gasket can seal where high pressure and temperature are present. The ASME B16.5 and B16.47 series flanges, as well as flat and raised face diameter flanges up to and including Class 2500, are suitable for its use.
Advantages
This gasket has many advantages listed below. As a result, it became one of the most popular gaskets.
- Outer centering ring centers gasket on the flange and provides a compression stop
- Operating temperatures up to 1800°F with Thermiculite® filler
- The shaped metal windings provide resiliency
- Standard sizes are available for most flanges
- Inner ring prevents radial buckling
Spiral Wound Gasket Identification Color Code
Below is about the color code of spiral wound gasket to identify which steel the gasket uses| Winding Material | Min Temp | Max Temp | Color Code | Color |
|---|---|---|---|---|
| SS304 | -320°F | 1400°F | Yellow | |
| SS316L | -150°F | 1400°F | Green | |
| SS317L | -150°F | 1400°F | Maroon | |
| SS321 | -320°F | 1400°F | Turquoise | |
| SS347 | -320°F | 1700°F | Blue | |
| Alloy 20 | -300°F | 1400°F | Black | |
| Titanium | -320°F | 2000°F | Purple | |
| Inconel 600/625 | -150°F | 2000°F | Gold | |
| Incoloy 800 | -150°F | 1600°F | White | |
| Inconel X750 | -150°F | 2000°F | No | |
| Incoloy 825 | -150°F | 1600°F | White | |
| Hastelloy C276 | -300°F | 2000°F | Beige | |
| Hastelloy B2 | -300°F | 2000°F | Brown | |
| Nickel 200 | -320°F | 1400°F | Red | |
| Monel | -200°F | 1500°F | Orange |
Spiral Wound Gasket Filler Color Code
| Filler Material | Abbreviation | Color Code | Color |
|---|---|---|---|
| PTFE | PTFE | White | |
| Graphite | FG | Grey | |
| Mica | MICA | Pink | |
| Ceramic | CER | Light Green | |
| Vermiculite | VERM | Light Blue |
