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:

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

Note:1.We also can produce according to JIS.JPI standards or client request