The stainless steel flange is the part that makes the connection between the pipe and the pipe. There is a sealing device in the gate valve and the upper thread ring valve. The handwheel should be in the uppermost position and should be tightened. The tissue value leaks from the packing.

In order to ensure the reliability of the seal, the pressure applied to the thicker gasket should be greater, which actually increases the burden on the sealing device and reduces the reliability of the seal. When flanges are installed on pipes or equipment, the pressure of the hydraulic test shall not exceed the regulations. Because in the flange size series, when calculating the flange thickness, 16 is based on the 200℃ MNR machine. No matter which type of connection needs to use gaskets, this will ensure the internal environment of the pipeline. Therefore, it should be considered for ease of disassembly and installation. With the passage of time and the influence of temperature, the creep of each component gradually increases, making the pressure on the gasket smaller and smaller, resulting in seal failure. Concave and convex flange faces are commonly used in German standards and national standards PN4.0, pn6.4 MPa level, which is determined by the stress level. The convex shape of the sealing surface of the concave and convex flanges is better than normal, but not Easy to replace the gasket. The gate valve and the upper check valve have inverted sealing devices, and the upper surface of the hand wheel will not rust or corrode for a long time. In addition to carbon, stainless steel flanges generally contain a small amount of silicon, manganese, sulfur, phosphorous, and stainless steel flanges can play an important role. The value of pipe connection can be divided into different types and types according to different classification standards and classifications. The types have different functions and advantages, and show different value content and roles in the industry in use.