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Spiral Wound Gaskets can be used to seal fluid
pressure up to 250 bar cryoprnices temperature as low as -200°C and up to elevated temperature of 1000°C. Products are widely used in the oil, gas, petrochemical process and engineering industries.
Spiral wound gaskets type:
Type | Thickness(mm) | |
Basic form | 3.2 | 4.5 |
With inner ring | 4.5 | |
With outer ring | 4.5 | |
With inner and outer ring | 4.5 |
Structure type:
Filler | Hoop | Inner ring | Outer ring |
Asbestos | SUS 304 | Carbon steel | Carbon steel |
Graphite | SUS 316 | SUS 304 | SUS 304 |
PTFE | SUS 316L | SUS 316 | SUS 316 |
SUS 316L | SUS 316L |
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. |
<=600 | <=24" | >=26" and <=34" | ±0.5 |
>600 and <=800 | >24" and <=34" | >=36" and <=60" | ±0.9 | |
>800 and <=1600 | >34" and <=60" | ±1.3 | ||
>1600 | >60" | ±1.6 | ||
Gasket O.D. | <=600 | <=24" | <=24" | ±0.9 |
>600 and <=1600 | >24" and <=60" | >24" and <=60" | ±1.8 | |
1600 | >60" | ±2.2 | ||
Outer ring O.D | >=1/2" and <=60" | ±0.9 | ||
<=600 | <=24" | 0-1.0 | ||
>600 and <=1000 | >24" and <=34" | 0-1.8 | ||
>1000 and <=1600 | >34" and <=60" | 0-2.2 |
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