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| Customization: | Available |
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| Material: | Stainless Steel Inner and Outer Ring |
| Application: | Flanges |
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Spiral Wound Gasket,ASME B16.20 Metal Gasket for 150#, 300#, 600#,900#,1500# and 2500# flanges
Ring Joint Gasket, ASME B16.20 Metal Gasket for 150#, 300#, 600#,900#,1500# and 2500# flanges
ASME B16.20 Metal Gasket Material available: CS/304/304L/316/316L/321/347... all steel family
Spiral Wound gaskets, ASME B16.20 Metal Gasket
The concept of spiral wound gasket construction was originated by Flexitallic in 1912, inaugurating the beginning of a new era in safe, effective sealing. The primary purpose for this development was the increasingly severe temperatures and pressures used by U.S. refinery operators in the first half of the century.
The necessity for a gasket to recover is paramount to ensure long-term sealing integrity. This requirement stems from the need to compensate for the effects of pressure and temperature fluctuations, thermal gradients across the flange face, as well as bolt stress relaxation and creep.
The spiral wound gasket provides a precision-engineered solution to these challenges. It is designed to maintain a seal under the most exacting conditions of temperature and pressure in flanged joints and offers high resistance against virtually every known corrosive and toxic media.
ASME B16.20, which governs spiral wound gaskets, mandates the use of solid metal inner rings in:
Pressure Class 900 for nominal pipe sizes 24" and larger
Pressure Class 1500 for nominal pipe sizes 12" and larger
Pressure Class 2500 for nominal pipe sizes 4" and larger
All PTFE-filled gaskets
The standard also specifies how spiral wound gaskets should be characterized. Below you will find an illustrative image.
| Ring & Strip Materials | ||||||
| Minimum | Maximum | GuideRing Color Code | ||||
| Material | F | C | F | C | Abberviation | |
| SS 304 | -320 | -195 | 1400 | 760 | 304 | Yellow |
| SS 316L | -150 | -100 | 1400 | 760 | 316L | Green |
| SS 347L | -150 | -100 | 1400 | 760 | 317L | Maroon |
| SS 321 | -320 | -195 | 1400 | 760 | 321 | Turquoise |
| SS347 | -320 | -195 | 1700 | 925 | 347 | Blue |
| Carbon Steel | -40 | -40 | 1000 | 540 | CRS | Silver |
| Alloy 20 | -300 | -185 | 1400 | 760 | A-20 | Black |
| Hastelloy B3 | -300 | -185 | 2000 | 1090 | HASTB | Brown |
| Hastelloy C276 | -300 | -185 | 2000 | 1090 | HASTC | Belge |
| Incoloy 800 | -150 | -100 | 1600 | 870 | IN 800 | White |
| Incoloy 825 | -150 | -100 | 1600 | 870 | IN 825 | White |
| Inconel 600 | -150 | -100 | 2000 | 1090 | INC 600 | Gold |
| Inconel 625 | -150 | -100 | 2000 | 1090 | INCO 625 | Gold |
| Inconel X750 | -150 | -100 | 2000 | 1090 | INX | No Color |
| Monel 400 | -200 | -130 | 1500 | 820 | MON | Orange |
| Nickel 200 | -320 | -195 | 1400 | 760 | NI | Red |
| Titanium | -320 | -195 | 2000 | 1090 | TI | Puple |
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