Although thegasket made ofnon-metallic materialshas goodflexibility,compressibility andlowbolt loadsadvantages,high temperature,high pressureproperties arenot as good asthe metal gasketso thatthe metalmaterialwithhigh strength, good elasticity,can withstand high temperaturescharacteristics,structuresmade with acombination of the twopads,i.e.metalor semi-metal gasketgasket.Metalgasketswider use,itsvariety of species.Typicalmetalgasketsincluding metalspiral wound gaskets, metaljacketed gaskets, metaldashboardflexiblegraphite gasketsandcorrugated metalgasketsand other four.