Spiral Wound Gasket
Spiral Wound Gasket is the highly reliable gasket, which is widely used from low pressure line to high temperature and high pressure Spiral wound gasket is the most ideal semi metallic gasket designed reasonably for high temperature and high pressure and its shape is to concretely weld non-ferrous metal (filter) and metallic thin plate (hoop) in W-shape section Because it has excellent performance on heat resistance, pressure resistance, and temperature change, it is widely used from general petroleum refining to petrochemical field.
-. How to recognize and mark it according to ASME B16.20 standard
-. KUKIL INNTOT SPIRAL WOUND GASKET TYPE
Basic | Inner Ring | Outer Ring | In & Outer Ring |
-. Spiral Wound Gasket Color Coding and Max. Temperature
< Hoop Material >
Material | Abbreviation | Max. Temperature [ °C ] | Color Code - ASME B16.20 |
Carbon Steel | CRS | 540 | Silver |
304 SS | 304 | 760 | Yellow |
316 L SS | 316 L | 760 | Green |
347 SS | 347 | 925 | Blue |
321 SS | 321 | 760 | Turquoise |
Ni-Cu | ? | 820 | Orange |
Nickel 200 | Ni | 760 | Red |
Titanium | Ti | 1,090 | Purple |
20 Cb-3 Alloy | A-20 | 760 | Black |
Ni-Mo | HAST B | 1,090 | Brown |
Ni-Mo-Cr | HAST C | 1,090 | Beige |
Ni-Cr-Fe | INC 600 | 1,090 | Gold |
Ni-Cr-Fe-Ti | INX | 1,090 | No Color |
Ni-Fe-Cr | IN 800 | 870 | White |
< Filler Material >
Material | Abbreviation | Max. Temperature | Color Code - ASME B16.20 |
Non-Asbestos | N.A | 250 | No Stripe |
Polytetrafluoroethylene | PTFE | 250 | White Stripe |
Mica-Graphite | M.G | 1,000 | Pink Stripe |
Flexible-Graphite | F.G. | 650 | Gray Stripe |
Ceramic | CER | 1,100 | Light Green Stripe |
-. Tolerances
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ASME B16.20 | Tolerances | |||
ANSI B16.5 | ANSI B16.47-A | ANSI B16.47-B | ||
D1 | 1/2" ~ 3" | - | - | ± 0.8 |
D2 | 1/2" ~ 8" | - | - | ± 0.4 |
D3 | 1/2" ~ 8" | - | - | ± 0.8 |
D4 | 1/2" ~ 24" | - | - | ± 0.8 |




