Flanges are disk-shaped parts that are most common in pipeline engineering. Flanges are used in pairs and with matching flanges on valves. In pipeline engineering, flange is mainly used for pipeline connection. In the need to connect the pipe, various installation of a flange, low pressure pipe can use wire flange, the use of more than 4 kg of pressure welded flange. Put a gasket between the two flanges and fasten them with bolts. Flanges of different pressures have different thicknesses and use different bolts.
Water pumps and valves, when connected with pipes, the local parts of these equipment are also made into the corresponding flange shape, also known as flange connection. All in the two planes in the periphery of the use of bolt connection at the same time closed connection parts, generally called "flange", such as the connection of ventilation pipe, this kind of parts can be called "flange class parts". But this connection is only a part of the equipment, such as the connection of the flange and the water pump, it is not good to call the water pump "flange parts". Relatively small, such as valves, can be called "flange parts".
Stainless steel flange gasket is a kind of ring made of material which can produce plastic deformation and has certain strength. Most gaskets are cut from non-metallic plates, or made by professional factories in accordance with the specified size, the material is asbestos rubber board, asbestos board, polyethylene board, etc.; Also useful thin metal plate (sheet iron, stainless steel) asbestos and other non-metallic materials wrapped up made of metal gasket; There is also a winding gasket made of thin steel tape wound with asbestos tape. Ordinary rubber gasket suitable for temperature below 120℃ occasions; Asbestos rubber gasket is suitable for water vapor temperature below 450℃, oil temperature below 350℃, pressure below 5MPa occasions, for general corrosive media, the most commonly used is acid-resistant asbestos board. In high pressure equipment and pipelines, the use of copper, aluminum, 10 steel, stainless steel made of lens type or other shapes of metal gaskets. The contact width between high pressure gasket and sealing surface is very narrow (line contact), and the processing finish between sealing surface and gasket is high.
Low pressure small diameter wire flange, high pressure and low pressure large diameter are welded flange, different pressure flange thickness and connecting bolt diameter and number are different.
Post time: Mar-10-2023