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| Customization: | Available |
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| Material: | Stainless Steel SS304 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.
In demanding industrial environments, gasket performance is paramount. The ability of a gasket to recover-to spring back and maintain sealing force-is not just a feature; it is a fundamental necessity. Systems are subjected to constant challenges: rapid pressure surges and drops, extreme temperature cycles, and the inherent relaxation and creep of bolting stress over time. A static gasket will inevitably fail under these conditions. Only a gasket engineered with superior flexibility and dynamic recovery can compensate for these fluctuations, ensuring a leak-free seal throughout the service life of the assembly.
The Spiral Wound Gasket is the precision-engineered answer to these complex sealing challenges. By its very design, it is built for resilience and long-term performance where it matters most.
How It Achieves Unmatched Performance:
Inherent Spring-Like Action: The gasket is mechanically wound in a continuous, spiraled V-shaped profile from alternating plies of a precision-formed metal strip and a soft filler material. This unique construction creates a built-in spring. When compressed between flanges, it stores energy, allowing it to dynamically respond and recover during thermal cycling, pressure spikes, and bolt stress relaxation.
Robust Construction for Extreme Service: The strategic combination of a high-integrity metal winding (such as 304/316 Stainless Steel, Hastelloy, or Titanium) with a resilient filler material (like PTFE, Graphite, or Mica) creates a gasket capable of meeting the most exacting conditions of temperature and pressure. This makes it the superior choice for critical applications across oil & gas, chemical processing, power generation, and refining.
Confronting Corrosion and Toxicity: Available in a wide range of metal and filler material combinations, the Spiral Wound Gasket can be specified to provide exceptional resistance against virtually every known corrosive and toxic media. This ensures process integrity, operational safety, and environmental protection.
Key Advantages at a Glance:
Superior Resilience: Excellent recovery properties to maintain a seal under variable loads.
Exceptional Strength & Flexibility: Withstands extreme pressure and temperature fluctuations without compromising the seal.
Versatile Material Compatibility: Tailor-made for specific media, from common chemicals to aggressive acids and caustics.
Proven Reliability: The industry-standard solution for critical flanged joints in ASME B16.20, API 601, and other international standards.
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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