Spiral Wound Gaskets
This is one type of Piping/Flange Gasket. Where internal pressure & temprature is higher and thermal cycle is more, SWG are used. They have good compressibilty and recovery. This give good leak proof joint for more thermal cycle. They are also usd in HEat Exchanger and Valve Industry.
As the name suggest, these are manufactured by evenly winding formed metal strip and filler material over a die in concentric spiral manner. Usually formed metal strip is of SS and filler material is Asbestos, Non Asbestos, PTFE, Pure Graphite, etc. Following SWG are manufactured at SAGPL:
Spiral gasket w/o inner & outer ring
Spiral gasket with outer ring/ centering ring
Spiral gasket with only inner ring
Spiral gsket with inner and outer ring