Introduction to the quality technology and special uses of large-diameter flanges

Large-diameter flange is a kind of flange. It is widely used and promoted in the machinery industry and has been well-received and favored by users. Large-diameter flanges have a wide range of uses, and the range of use is determined according to different characteristics. They are mostly used when the medium conditions are relatively mild, such as low-pressure non-purified compressed air and low-pressure circulating water. Its advantage is that it is relatively cheap. The rolled flange is suitable for connecting steel pipes with a nominal pressure not exceeding 2.5MPa. The sealing surface of the rolled flange can be made into a smooth type. The application volume of the smooth type rolled flange is that the other two types of rolled flanges are in It is also relatively common in use.

The large-diameter flange is cut into slats from a medium plate and then rolled into a circle. Then the water line, bolt holes, etc. are processed. This is generally a large flange, which can be up to 7 meters. The raw material is medium board with good density. Large-diameter flange materials include carbon steel, stainless steel, alloy steel, etc.

The manufacturing characteristics and uses of large-diameter flanges are mainly reflected in the above places. If we all operate and use large-diameter flanges, we all need to understand these characteristics they have.

There are three types of large-diameter flange sealing surfaces: flat sealing surfaces, suitable for situations where the pressure is not high and the medium is non-toxic; concave and convex sealing surfaces, suitable for situations where the pressure is slightly higher; tongue-and-groove sealing surfaces, suitable for flammable, Explosive, toxic media and high-pressure situations. What is the quality process of large-diameter flanges?

The quality process of large diameter flange is as follows:

Large-diameter flanges are produced using different processes and have their advantages and disadvantages, but this is not the case. For large-diameter flanges made of medium plates, the handling of the joint position is the most critical. If this position is not welded well, leakage will occur. For forged large-diameter flanges, there will be a layer of skin on the finished flange after it comes out. If the bolt holes are hit exactly at the position of the skin, water leakage will occur when the flange is pressed.