Spiral Wound Gasket
The spiral wound gasket are composed of a metallic continuous strip with a special shaped profile, coupled with a continuous foiling strip evenly wound in concentric spirals under constant stress. The spiral wound gaskets are reinforced on the inner and outer diameters by winding of several electrically welded spirals of metal only.
They are used worldwide for pipelines, refining plants, chemical or petrochemical plants, nuclear plants, compressors piping, cylinder heats, heat exchangers, etc. It is able to accommodate pressures from high vacuum to over 700 bar (10000 psi) and seal at temperatures from cryogenic to 1650°C. They are available in International standards, (ANSI B16.5, BS1560, BS10, BS4504,MSS SP44, DIN and AP1605) or custom made to individual sizes.
An external ring is used to center the gasket on flange face, provides additional radical strength to prevent gasket blow out and acts as a compression stop. General used on raised face and flat face flanges.
Similar to TP 12 but fitted with internal ring which gives an additional compression limiting stop and provide heat and corrosion barrier. Protecting gasket windings and preventing flange erosion. Suitable for use with raised face and flat face flanges and specified for high pressure/temperature service.