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flat welding flange

First of all, we need to understand how centrifugal flanges are produced. The process and products of centrifugal casting to make flat welding flanges are characterized by the fact that the product is processed through the following process steps:

① Put the selected raw material steel into the intermediate frequency electric furnace for melting, so that the temperature of the molten steel reaches 1600-1700°C;

② Preheat the metal mold to 800-900℃ to maintain a constant temperature;

③Start the centrifuge and inject the molten steel in step ① into the preheated metal mold in step ②;

④Cool the casting naturally to 800-900℃ for 1-10 minutes;

⑤Cool with water to close to normal temperature, demould and take out the casting

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Product Details

The first thing to look at is the height of the protrusion (convex surface), and the second thing is to see whether there is an anti-slip ring on the protruding surface (convex surface). The former is, but the latter is not. Moreover, the two flange connection forms are also different. In the former, both flanges have convex surfaces, while in the latter, one is a convex surface and the other is a concave surface. flat welding flange

It is mostly used when the medium conditions are relatively mild, such as low-pressure non-purified compressed air and low-pressure circulating water; when the medium temperature and pressure are not high but the medium is highly corrosive. When the medium is highly corrosive, the part of the flange that contacts the medium (the flanged nipple) is made of corrosion-resistant high-grade materials such as stainless steel, while the outside is clamped by a flange ring of low-grade material such as carbon steel. to achieve sealing.

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