| Customization: | Available |
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| Material: | SS316L, 304 CS, Graphite |
| 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 have the ability to recover cannot be over emphasized. The effects of pressure and temperature fluctuations, the temperature differential across the flange face, together with bolt stress relaxation and creep, demand a gasket with adequate flexibility and recovery to maintain a seal even under these varying service conditions. The Spiral Wound Gasket is the precision engineered solution to such problems, meeting the most exacting conditions of both temperature and pressure in flanged joints and similar assemblies and against virtually every known corrosive and toxic media.The spiral wound gasket meets the most exacting conditions of both temperature and pressure in flanged joints and similar assemblies and against every known corrosive and toxic media.
ASME B16.20 which covers spiral wound gaskets requires the use of solid metal inner rings in: Pressure Class 900, nominal pipe sizes 24 and larger, Pressure Class 1500 from nominal pipe sizes 12 and larger, Pressure Class 2500 from nominal pipe sizes 4 and larger and all PTFE filled gaskets. In the same standard is also described how a spiral wound gasket should be characterized, below you will find a image on it.
| Structure | Hoop material | Filler material | Inner&outer ring material | Normal thickness(mm) | |
| Gasket | Inner&outer ring | ||||
| Without rings | SS304(L);SS316(L) | Graphite | SS304(L);SS316(L) | 3.2mm | 2.0mm |
| Carbon steel | Aebestos | Carbon steel | |||
| With outer ring | SS321;SS317L | Non-asbestos | SS321;SS317L | ||
| Monel;Inconel | Mica | Monel;Inconel | 4.5mm | 3.0mm | |
| With Inner ring | Titanium;Nickel | PTFE | Titanium;Nickel | ||
| Duplex 31803 | PTFE | Duplex 31803 | |||
| With inner&outer rings | Hastelloy | Ceramic tape | Hastelloy | 6.4mm | 4.0mm |
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