In pipeline engineering, flanges are mainly used for pipeline connection. For pipelines that need to be connected, there is a flange plate for various devices, low-pressure pipelines can use wire-connected flanges, and welded flanges for pressures above 4 kg. A gasket is added between the two flanges.
Then tighten with bolts. Flanges with different pressures have different thicknesses and use different pumps and valves. When connecting with the pipeline, the parts of these equipment and equipment are also made into corresponding flange shapes, also called flange connections. However, the connecting parts that are connected by bolts on the periphery of two planes at the same time are generally called "flanges", such as the connection of ventilation pipes.
This type of parts can be called "flange parts" but this connection is only a part of the equipment, such as the connection between the flange and the water pump, it is not good to call the water pump "flange parts". Compared to small ones such as valves, etc. , Can be called "flange parts". Gasket is a ring made of materials that can produce plastic deformation and have a certain strength. Most of the gaskets are cut from non-metallic plates, or manufactured in regular sizes by professional factories.
The materials are asbestos rubber sheets, asbestos sheets, polyethylene sheets, etc.; there are also metal-clad gaskets made by wrapping non-metallic materials such as asbestos with thin metal sheets (white iron sheet, stainless steel); there is also a kind of thin steel belt and A spiral wound gasket made of asbestos tape. Ordinary rubber gaskets are suitable for places where the temperature is lower than 120℃; asbestos rubber gaskets are suitable for places where the temperature of water vapor is lower than 450℃, the temperature of oil is lower than 350℃, and the pressure is lower than 5MPa. Regarding general corrosiveness The most commonly used medium is acid-resistant asbestos board.