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What is the heat treatment process for flange pipe fittings?

Date: 2021-04-02  Views:

Flanges are called flange joints together with flange gaskets and fasteners. Flange joints are widely used parts in engineering. Flange parts can be used in many large-scale construction and mechanical devices, and flange parts are used in these devices. It plays a very important role in connection. It not only strengthens the connection of the device, but also needs to play a leak-proof function. Flange parts are an indispensable part of piping design, piping accessories, and valves. It is also a common component for other projects such as industry, thermal engineering, water supply and drainage, heating and ventilation, and automatic control.

Forged flange sealing surfaces can be divided into three main types. The flat sealing surface is suitable for low pressure and non-toxic media, and the concave-convex sealing surface is suitable for slightly high pressure. The sealing surface of the tongue and groove is easy to burn and explode. In the case of toxic media and high pressure, the gasket is a plastically deformed ring made of a material with a certain strength. Although this sealing surface is a hidden danger of disassembly, it is also suitable for some pipe connections with lower pressure.

Flange heat treatment process:

When the metal is heated, insulated, and cooled, the performance of the metal will change to a certain extent. After heating, the performance of the same flange pipe will also be different. For example, stainless steel flanges have excellent performance, so stainless steel flanges can be hot and cold processed. The heating process of stainless steel flange pipes is one of the important parameters of the heat treatment process.

In the heat treatment of flange pipes, the annealing cooling rate is usually the slowest, the normalizing cooling rate is faster, and the quenching cooling rate is faster. However, different steel grades have different requirements, so when the flange is processed, it must be processed according to different materials.

In flange processing, temperature is one of the production factors that need to be strictly controlled. When heating flange pipes, it is necessary to strictly control the production temperature to ensure the quality of the flange. Of course, the heating needs to be determined according to the state of the flange, so it must Carry out sufficient and detailed control. There are various heating methods for metal heat treatment of flange pipelines. First, charcoal and coal are used as heat sources, and then liquid and gas fuels are used. Now many manufacturers use easy-to-control, pollution-free electrical applications. These heat sources can be directly heated, molten salt, metal and suspended particles can be heated indirectly. The performance of the flange varies with the cooling method and process. The cooling rate is mainly controlled. If the cooling rate is too fast, it will cause a certain degree of damage to the flange structure. Influence, cause the flange itself to become brittle.

The above is some knowledge about flanges. I hope that these contents can help you better understand the flange part. Of course, it should be noted that although the flange can be connected to the pipe end well to prevent leakage, it is actually In use, flanges of different materials must be selected according to different conveying media. Common flanges include stainless steel flanges, carbon steel flanges, and alloy steel flanges. Among them, stainless steel flanges have the best performance.