Large diameter flange is one of the types of flanges, specifically used in industrial treatment such as mechanical industry, chemical industry, wind power generation industry, and sewage treatment industry, and is highly praised and favored by users. The materials for large-diameter flanges are carbon steel, stainless steel, and alloy steel, and the production process is divided into rolling and forging,
Larger flanges can only be rolled and are mainly used for low-pressure non purified compressed air and low-pressure circulating water under moderate temperature conditions.
Smooth large-diameter flanges are suitable for connecting steel pipes with a nominal pressure not exceeding 2.5MPa. The sealing surface of the rolled flange can be made smooth, and smooth rolled flanges have a large application volume. The other two types of coiled flanges are also commonly used.
Product classification and characteristics of large-diameter flanges, flat welding flanges and butt welding flanges are common large-diameter flanges, without threaded flanges for large-diameter flanges. Flat welded large-diameter flanges account for a large proportion in actual production and sales. The reason why the characteristics and advantages of flat welded large-diameter flanges and butt welded large-diameter flanges are different is that,
Their structures and application ranges are different.
Therefore, in order to ensure that flanges play an important role, they must be used in different areas. Flat welded large-diameter flanges are suitable for situations with pressure p ≤ 4MPa and poor rigidity. They are called high neck flange butt welding flanges. Due to their high stiffness, they are suitable for situations with high pressure and temperature, and are suitable for low-pressure medium fields
A flat sealing surface suitable for concave convex sealing surfaces in slightly high pressure situations, suitable for tenon groove sealing surfaces in flammable, explosive, toxic media, and high-pressure situations. These three surfaces are three types of flange sealing surfaces, which have good product performance in different fields, and have different applications and spaces
The impact is that large-diameter flange pipe fittings have different characteristics in different fields and applications.
Main performance Production characteristics and use of large diameter flange: cut the intermediate plate into Flat noodles, roll it into a circle, and then use the large diameter flange to process water pipes, bolt holes, etc. Usually, this is a large-diameter flange with a length of approximately 7 meters, and the raw material is medium density wooden board.
The use of different processes to produce large-diameter flanges has its advantages and disadvantages, but this is not certain. For large-diameter flanges made on intermediate plates, the key is to handle the joint position. If this position is not welded correctly, leakage will occur. For forged large-diameter flanges, a layer of skin will appear on the flange after the finished product leaves the factory,
If the bolt holes are located exactly at the position of the layer skin, water leakage will occur when suppressing pressure.
