The flat welding flange is a concave platform with an inner hole that is slightly larger than the outer diameter of the pipe, and the pipe is inserted into it and welded. The flat welding flange can greatly reduce weight and save space, and can also ensure that the joint does not leak and has good sealing performance. Next, this article will give you a specific introduction to why flat-welded flanges can save space. The reason for the reduction in the size of the flat welding flange is that the diameter of the seal is reduced, which will reduce the cross-section of the sealing surface. Secondly, replace the flange gasket with a sealing ring to ensure the matching of the sealing surface. In this way, the lid can be pressed tightly with only a small amount of pressure. As the pressure required decreases, so does the size and number of bolts, resulting in a small and light flange. Therefore, the flat welding flange is an excellent flange, which reduces the burden on quality and space, and plays an important role in industry.