CHYGRATM Spiral Wound Gaskets can be used to seal fluid pressure up to 250 bar cryoprnices temperature as low as -200C and up to elevated temperature of 1000C. Products are widely used in the oil, gas, petrochemical process and engineering industries
Spiral wound gaskets type:
Structure type:
The table below may be used for selected material of inner ring and winding metal.
| Trade name | AISI | Hardness(HB/HV) | Temperature(°C) |
| Stainless steel 304 | 304 | 130~180 | -250~+550 |
| Stainless steel 316 | 316 | 130~180 | -100~+550 |
| Stainless steel 316L | 316L | 130~190 | -100~+550 |
The outer ring is generally manufactured from carbon steel with an anti-corronsion treatment.
The table below may be used for determining the correct filler.
| Filler material | Temperature(°C) | Max operating pressure(kg/cm2) |
| Graphite | -200~550 | 250 |
| Asbestos | -150~450 | 100 |
| PTFE | -240~260 | 100 |
Flange type and Spiral Wound Gasket form
| Flange type | Spiral Wound Gasket form |
| Flat face flange(F.F) | Gasket with an outer ring |
| Gasket with an inner and outer ring |
| Raised face flange(R.F) | Gasket with an outer ring |
| Gasket with an inner and outer ring |
| Male and female flange(M & F) | Basic form gasket |
| Gasket with an inner ring |
| Tongue and groove flange(T & F) | Basic form gasket |
| Gasket with an inner ring |
| Flat and groove flange(F & G) | Basic form gasket |
| Gasket with an inner ring |
Tolerances of thickness
| Item | Thickness(mm) | Tolerances(mm) |
| Gasket thickness | 4.5, 3.2 | +0.2
-0.1 |
| Ring thickness | 3.0 | ±0.24 |
The table below specifies the production diameter tolerance (Nominal pipe diameter for flanges in accordance with):
| | DIN (mm) | ANSI B16.5
BS1560 (mm)
Mss sp-44 | API 605 | Tolerances |
Inner ring I.D.
Gasket I.D. | | | >=26" and | ±0.5 |
| >600 and | >24" and | >=36" and | ±0.9 |
| >800 and | >34" and | | ±1.3 |
| >1600 | >60" | | ±1.6 |
| Gasket O.D. | | | | ±0.9 |
| >600 and | >24" and | >24" and | ±1.8 |
| 1600 | >60" | | ±2.2 |
| Outer ring O.D | | | >=1/2" and | ±0.9 |
| | | 0-1.0 |
| >600 and | >24" and | | 0-1.8 |
| >1000 and | >34" and | | 0-2.2 |
Note:1.We also can produce according to JIS.JPI standards or client request
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