The use of metal flat gaskets-hardware

There are many types of metal flat gaskets, and gaskets of different materials and shapes have different functions. If the wrong gasket is selected, it will not only fail to seal well, but it may also become a hidden danger, which may cause danger at any time. Do you know what are the metal flat gaskets and what are their characteristics? Metal flat gaskets, wave gaskets and toothed gaskets. Metal flat gaskets and metal wave gaskets are generally used on medium and high pressure valves, pipelines and equipment flanges with smaller diameters. The working pressure depends on the temperature, the former is 1.568~31.36MPa, and the latter is 1.568~3.92MPa. The material of the gasket is selected according to the medium and temperature. Octagonal gasket and oval gasket The octagonal gasket and oval gasket (commonly known as 'earth steel ring' in the oil refining industry) for trapezoidal groove flanges have good sealing performance. On the tapered surface of the groove, the octagonal pad is in surface contact and the oval pad is in line contact. Therefore, the oval pad has a good fit under low tightening force, but it needs to be tightened twice; while the octagonal pad is generally not easy to leak after being tightened once. Their shortcomings are that they require a large bolt tightening force. When used in low pressure and high temperature conditions, the flange level must be above pg25 kg. Screw flat washers are often used for screw locking to enhance screw tightening. The use scene is simple and convenient. Different materials are also selected according to different industries, most of which use stainless steel, cold plate galvanized, etc.