NEW HOME PRODUCTS MARKETS QUALITY ASSURANCE BLOG CONTACT CALL 01535 274 776 Spiral Wound Gaskets The Spiral Wound Gasket is a very versatile sealing product and has considerable mechanical strength and recovery characteristics. It is of semi-metallic configuration and capable of sealing a wide range of media across a range of Pressure (upto 450 Bar) and Temperature (-250 to +1000⁰C) applications. Spiral Wound Gaskets can be used with various flange face configurations and it is this that ultimately determines what style of gasket is required. Contact us The main characteristic of the Spiral Wound Gasket is the sealing element itself which is manufactured by spirally winding a ‘V’ shaped metallic strip and incorporating a soft filler, generally Graphite, PTFE or specially developed High Temperature material and it is this that maintains an effective seal at varying temperatures and pressures. The Spiral Wound Gasket configuration can also include an outer and inner ring. The Outer ring acts as a locator within the bolt circle and also as a compression stop supporting the sealing element and resisting ‘blow-out’ by preventing over-compression whilst the inner ring acts as a heat shield and corrosion barrier to protect the actual spiral element from media attack. Material construction generally depends on the application conditions, predominantly media, temperature and pressure values, the most common construction being 316 Stainless Steel Winding and Inner Ring, a Carbon Steel Outer Ring and Graphite Filler Material. Contact us Applications and Benefits of a Spiral Wound Gasket Accommodates a high variation in Temperature Range Accommodates a high range in Pressure Used in Pipelines, Valves, Pumps and Thermal Exchanges Industries Served Petrochemical Pharmaceutical Nuclear Energy Oil and Gas Offshore Marine Pump and Valve Installation The Gasket Outer Ring fits within the Flange Bolts thus locating the gasket centrally on the raised face. The Outer Ring acts as a compression stop preventing over-compression of the sealing element avoiding potential ‘blow-out’. The Inner Ring acts as a barrier, preventing media attack. Contact us Typical Filler Materials are GRAPHITE For use with Hydrocarbons, Oil, many Chemicals and Steam Service. 450⁰C > 400 bar PTFE Oxygen Clean Service Resistant to virtually all Chemicals 260⁰C > 100 bar MICA High temperature and High Pressure Applications 1000⁰C >100 bar SOI This is the most common type of Spiral Wound Gasket, having both an Inner and Outer Guide Ring. Generally used for Raised Face and Flat Face Flange applications SO This gasket is supplied with just an outer ring and may sometimes be used in similar applications to the SOI, though generally not preferred SI This style of Spiral Wound incorporates only an Inner Ring and is generally used in Male to Female Flange applications S Used in Tongue and Groove, male to female and flat to recess flanges. Often seen in Valve bonnet and Exchanger applications. Spiral Wound Gasket Material Configurations Winding / Inner / Outer Ring Material Combinations Maximum Temperature ASME B16.20 Colour Coding Carbon Steel 500⁰C Silver 304 Stainless Steel 550⁰C Yellow 316/L Stainless Steel 550⁰C Green 316 Ti Stainless Steel 650⁰C Light Blue 321 Stainless Steel 650⁰C Turquoise 347 Stainless Steel 650⁰C Blue Duplex 800⁰C N/A Nickel 200 600⁰C Red Monel 400 600⁰C Orange Titanium 350⁰C Purple Hastelloy B-2 450⁰C Brown Hastelloy C-276 450⁰C Beige Inconel 600 950⁰C Gold Inconel 625 450⁰C Gold Inconel X-750 1000⁰C Light Grey Incoloy 825 450⁰C White Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.5 CLASS 150 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.5 CLASS 300 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.5 CLASS 600 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.5 CLASS 900 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.5 CLASS 1500 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.5 CLASS 2500 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.47 Series A CLASS 150 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.47 Series A CLASS 300 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.47 Series A CLASS 600 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.47 Series A CLASS 900 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.47 Series B CLASS 150 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.47 Series B CLASS 300 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.47 Series B CLASS 600 LB Spiral wound Gasket Dimensions : ASME B16.20 : For Flanges to B16.47 Series B CLASS 900 LB Spiral wound Gasket Dimensions : For Gaskets to BS EN 1514-2 To suit BS EN 1092-1 Flanges OFFICE ADDRESS PO Box 86, Bingley, BD16 9AQ PHONE NUMBER 01535 274 776 EMAIL ADDRESS sales@specialistsealingproducts.co.uk OPENING HOURS Monday – Sunday © 2021 Specialist Sealing Products – All Rights Reserved. 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