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Spiral Wound gaskets are made of a performed metallic strips and a soft filler material
(CAF , Non Asbestos, Graphite, Teflon, Ceramic, ETC) wound together under pressure and passionally with an inner and outer metal guide ring. The metal strip in grooved pattern holds the filler, resulting in excellent mechanical; resistance, re silence and recovery.
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Spiral wound gaskets are mainly used in high temperature variation (Thermal cycling) and / or pressure variation flange rotation problem etc.
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Spiral wound gaskets are designed to meet application against educate residual stress retention, flexibility and recover requirements.
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Types of Spiral wound Gaskets.
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| 1 |
Spiral wound gasket |
With out supporting ring |
| 2 |
Spiral wound gasket |
With Outer Ring |
| 3 |
Spiral wound gasket |
With Inner Ring |
| 4 |
Spiral wound gasket |
With Inner & Outer Both Rings |
The material of construction of Spiral Wound Gaskets is as per annexure
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| Annexure |
| Filler Material |
Recommended Maximum Temperature |
ASME B16.20 Color Coding |
| Graphite |
550°C |
Grey Stripe |
| PTFE |
260°C |
White Stripe |
| Non Asbestos/CAF |
350°C |
White/Pink Stripe |
| Ceramic |
650°C |
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| Winding Material |
Recommended Maximum Temperature |
ASME B16.20 Color Coding |
| 304 Stainless Steel |
650°C |
Yellow |
| 304L Stainless Steel |
650°C |
Yellow with Red Strip |
| 316/316L Stainless Steel |
650°C |
Green |
| 316Ti Stainless Steel |
650°C |
Light Blue |
| 347 Stainless Steel |
650°C |
Blue |
| 321 Stainless Steel |
650°C |
Turquoise Blue |
| Nickel 200 |
600°C |
Red |
| Titanium |
600°C |
Orange |
| Hastelloy B-2 |
450°C |
Purple |
| Hastelloy C-276 |
450°C |
Brown |
| Inconel 600 |
950°C |
Gold |
| Inconel 625 |
450°C |
Gold |
| Inconel X-750 |
1000°C |
Light Grey |
| Incoloy 825 |
450°C |
White |
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