Spiral Wound Gaskets

                                         
 

Spiral wound gaskets are special semi-metallic gaskets of  great strength and resilience. Manufactured by spirally winding V-shaped metal strips and strips of non-metallic filler with good sealing characteristics, they  are suitable for use under heavy operating conditions at high temperature and pressures. Applications include the sealing of flange joints, boilers, heat exchangers, valves and pressure vessels. Inner rings and outer rings may be added to reinforced the gasket. A range of metals and filler materials are available to suit different applications.  Standard Tesitallic spiral wound gaskets are  made to fit ANSI B 16.5 and BS 1560 flanges. Spiral wound conforming to ASME B16.20 specification on request. Colour coding to industry standard is available. Nominal thickness available is 4.5mm and 3.2mm. Special request is required for a nominal thickness of 6.4mm. Non standard spiral wound gaskets are available in various dimension and shapes for use as flange gasket, manhole gasket, handhole gasket or other applications. Spiral wound gaskets is only suitable for circular or moderately non-circular shapes.Limitations on size and shape largely depends on practical considerations in the manufacture of the gasket.   

Material Selection Table

Component

Material Type

Application Remarks

Metal strips & rings

Stainless Steel SUS 304

450 oC good corrosion resistance

Metal strips & rings

Stainless Steel SUS 304L

450 oC  high corrosion resistance

Metal strips & rings

Stainless Steel SUS 316

630 oC good corrosion resistance

Metal strips & rings

Stainless Steel SUS 316L

630 oC  high corrosion resistance

Metal strips only

Monel

630 oC very high corrosion resistance. Not for use in high sulphur atmospheres 

Rings only

Carbon Steel

For general use

Filler

Compressed Asbestos

500 oC good chemical resistance

Filler

Graphite

630 oC good chemical resistance

Filler

PTFE

300 oC excellent chemical resistance. For use in food and potable water application

 

Standard Spiral Wound Dimension Tables