PIRAL WOUND GASKET
 
Spiral wound gaskets have become extremely popular due to the wide variety of available styles and sizes. Spiral wound gaskets can be fabricated of any metal which is available in thin strip and which can be welded; therefore, they can be used against virtually any corrosive medium dependent upon the choice of the metal and filler.They can be used over the complete temperature range from cryogenic to approximately 2000ºF (1093ºC). This type of gasket can be used in all pressures from vacuum to the standard 2500 pressure class flange ratings. Spiral wound gaskets can also be manufactured with variable densities, i.e. relatively low density gaskets for vacuum service up to extremely high density gaskets having a seating stress of approximately 30,000 psi (207 MPa).The softer gaskets would require a seating stress in the range of 5,000 psi (34 MPa).
 
 
Style No: RS1-R gaskets are winding only.Without inner or outer ring is utilized. Used  in different applications, they may be furnished in many different sizes and thicknesses.
 
Style No:RS1-R gaskets are made in standard sizes to fit:

A. Large tongue and groove joints, 1/2 to 24 NPS, standard pressures;
B. Small tongue and groove joints, 1/2 to 24 NPS, standard pressures; 
C. Large male and female joints 1/4 to 24 NPS, standard pressures.
 

 
 
Style No: RS1-CG gaskets consist of a spiral wound sealing component with a solid metal outer guide ring. The outer guide ring serves to center the gasket properly in the flange joint,acts as an anti-blowout device, provides radial support for the spiral wound component, and acts as a compression gauge to prevent the spiral wound component from being over crushed.

Normally the outer guide rings are furnished in mild steel, but can be supplied in other metals when required by operating conditions.
 

 
Style No:RS1-CGI is identical to style RS1-CG, with the addition of an inner ring. The inner ring also serves several functions. Primarily, it provides radial support for the gasket on the ID to help prevent the occurrences of buckling or imploding. The inner ring also serves as an additional compression limiter.

Its ID is normally sized slightly larger than the ID of the flange bore, minimizing turbulence in process flow. The inner rings are normally supplied in the same material as the spiral wound component. Rilson normally manufactures standard Style RS1-CG and RS1-CGI spiral wound gaskets to ASME B16.20, designed to suit ASME B16.5 and ASME B16.47 flanges
 

 
Color coding guardlines for Spiral Wound Gasket
 

 
Dimensions for Spiral Wound Gasket(RS1-CGI) 
per ASME B16.20 to Suit ASME B16.5 Flanges
 

Spiral Wound Gasket tolerance per ASME B16.20 specifications
 
 
 
 Dimensions for Spiral Wound Gasket Style RS1-CG/RS1-CGi to Suit Flange Facings per EN 1514-2