Sealing principle of flat welding flange

Shanxi Haokun flanges often produces all kinds of flanges, including flat welding flange and butt welding flange. No matter which kind basically needs sealing, what is the sealing? Today, let's talk about the sealing principle of flat welding flange.Sealing principle of flat welding flange: the two sealing surfaces of the bolt squeeze the flange gasket to form a seal, but this will also lead to seal damage. In order to keep the seal, you have to maintain a huge bolt force. In order to do this, you have to make the bolt larger. The larger bolt matches the larger nut, which means that a larger bolt diameter is required to create the conditions for fastening the nut. However, the larger the diameter of the bolt, the flange will bend. The only way is to increase the wall thickness of the flange. The entire unit will require enormous size and weight, which becomes a special problem in the offshore environment, because in this case, weight is always the main problem that people must pay attention to. Moreover, fundamentally speaking, the flat welding flange is an invalid seal. It needs to use 50% of the bolt load for extruding the gasket, while the load for maintaining the pressure is only 50%. Flat welding flange is often used when the medium temperature and pressure are not high and the medium is highly corrosive. When the medium is highly corrosive. Rare integral flanges include flat welding flange and butt welding flange. Flanged fittings refer to fittings with flanges (lugs or adapters). It can be cast, and the flat welding flange is mainly the part that connects the pipe with the pipe. According to the structural type. It can also be formed by threaded connection or welding. Flange connection refers to a pair of flanges, a gasket and several bolts and nuts.