Grooved metal gasket is a kind of metal soft gasket, sealing effect is better than metal flat gasket, it is generally used with precision lathe in the metal stainless steel flat gasket two plane processing into concentric 90 degree angle waveform zigzag groove, based on the different medium, it can choose flexible graphite, PTFE, no asbestos plate or other soft metal, paste in the second side of the gasket, using the sealing of soft covering and metal strength, good elasticity, also consolidate the sealing effect, so to achieve the same sealing effect, gasket compression force is small. The tooth combination gasket is not used directly used with covering sealing layer, which can also achieve good sealing effect, but it is easy to cause loss to the surface of the flange in high pressure occasions. The Grooved combined gasket is mainly used in the sealing of pressure vessels and pipe flanges with medium and high pressure and high temperature.