ProductName：DIN Large Diameter Steel Pipe Flange
Platetype flat welding flange (chemical standard HG20592, national standard GB/T9119, mechanical
JB/T81) : convenient to draw, simple to manufacture, low cost, and widely used; However, the rigidity
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Large-diameter flanges are one of the flanges, which are widely used and promoted in the machinery industry, and are highly praised and favored by users. Large-diameter flanges have a wide range of uses, and the scope of use is determined according to different characteristics. They are mostly used under mild media conditions, such as low-pressure non-purified compressed air and low-pressure circulating water. Its advantage is that it is cheaper. Coiled flanges are suitable for the connection of steel pipes with a nominal pressure not exceeding 2.5MPa. The sealing surface of the coiled flange can be made into a smooth type. The smooth coiled flange has the largest application volume. The other two types of coiled flanges It is also common in use.
Large diameter flange is cut into slats with the middle plate, and then rolled into a circle. Waterline, bolt holes, etc. are processed. This is generally a large flange with a maximum length of 7 meters. The raw material is medium board with good density. Large diameter flanges are made of carbon steel, stainless steel, alloy steel, etc.
The manufacturing characteristics and uses of large-diameter flanges are mainly manifested in the above places. If we all operate and use large-diameter flanges, we all need to understand these characteristics.
There are three types of large-diameter flange sealing surface: flat sealing surface, suitable for occasions with low pressure and non-toxic media; concave-convex sealing surface, suitable for occasions with slightly higher pressure; tongue and groove sealing surface, suitable for flammable, Explosive, toxic media and high pressure occasions. What is the quality process of large-diameter flanges?
The quality process of large-diameter flanges is as follows:
Large-diameter flanges. Large flanges produced by using different processes have their own advantages and disadvantages, but this is not absolute. For the large-diameter flange made of the middle plate, the handling of the joint position is the most critical. If this position is not welded well, leakage will occur. For forged large-diameter large flanges, there will be a layer of skin on the flange after the finished product is out. If the bolt holes are exactly at the position of the layer of skin, water leakage will occur when pressed.
We use the above quality craftsmanship to make flanges, and make a good product with correct operation, which is what we all need to consider.
