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| Material: | Monel Inner and Outer Ring |
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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
Available 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.
1. Direct & Structured Version
This version breaks down the information into clear sections with bullet points, enhancing readability while maintaining a formal tone.
The Role of Gasket Recovery in Sealing Integrity
The ability of a gasket to recover is a fundamental requirement for a reliable seal. This is due to several operational factors that can compromise sealing integrity:
Fluctuations in pressure and temperature
Temperature differentials across the flange face
Bolt stress relaxation and creep
A gasket must possess adequate flexibility and recovery to maintain the seal under these dynamic service conditions.
The Spiral Wound Gasket: A Precision Engineered Solution
Engineered to address these challenges, the spiral wound gasket delivers performance in demanding applications:
Withstands the most extreme temperature and pressure conditions in flanged assemblies.
Provides reliable resistance against virtually all known corrosive and toxic media.
2. Concise & Integrated Version
This version streamlines the text into two focused paragraphs, removing redundancy for a more professional and direct description.
Gasket Recovery: A Critical Requirement
A gasket's ability to recover is essential to maintain a seal under varying service conditions. These include pressure and temperature fluctuations, thermal differentials across the flange face, and the effects of bolt stress relaxation and creep. Adequate flexibility and recovery are necessary to compensate for these factors.
Solution: Spiral Wound Gaskets
The spiral wound gasket is the precision-engineered solution for these challenges. It is designed to meet the most demanding conditions of temperature and pressure in flanged joints and provides effective sealing against virtually every known corrosive and toxic media.
3. Technical Data Sheet Version
This style uses concise, factual language typical of a technical specification sheet, ideal for an audience that prefers quick, factual data.
Requirement: Gasket Flexibility and Recovery
Operational dynamics-including cyclic pressure and temperature, flange face thermal gradients, and bolt stress relaxation-demand a gasket with sufficient recovery to maintain sealing integrity.
Product: Spiral Wound Gasket
As a precision-engineered component, the spiral wound gasket is specified for:
Service under the most exacting temperature and pressure profiles.
Exposure to a wide range of 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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