Spiral Wound Gaskets can be used to seal fluid pressure up to 250 bar cryoprnices temperature as low as -200°C and up to elevated temperature of 1000°C. Spiral Wound Gaskets are widely used in the oil, gas, petrochemical process and engineering industries.The spiral wound gaskets is made up of winding material body and inner/outer ring.There are spiral wound gaskets with ss304/ss304L tape+graphite/asbestos/PTFE tape,spiral wound gaskets made of ss316/ss316L tape+graphite/asbestos/PTFE tape,spiral wound gaskets made of ss321 tape+grphite/asbestos/PTFE tape,spiral wound gaskets made of other metallic tape+asbestos/graphite/PTFE tape,spiral wound gaskets winding body with ss304/ss304L/ss316/ss316L/carbon steel inner ring,spiral wound gaskets winding body with ss304/ss304L/ss316/ss316L/carbon steel outer ring,spiral wound gaskets winding body with both ss304/ss304L/ss316/ss316L/carbon steel inner ring and ss304/ss304L/ss316/ss316L/carbon steel outer ring. Main specification: Dimension Basic form: 3.2mm or 4.5mm (Thickness tolerance:-0.1mm to +0.2mm) Outer ring/inner ring :3.0mm (Thickness tolerance:-0.24 to +0.24mm) Coefficient:m=2.5-4 Pressure:=<25MPa Temperature:-196-700℃ (oxidating condition up to 600℃ at most) Least tighten pressure:68MPa