The importance of flange material to flange sealing
For pipe connection,flange connection is often used,but for some special industries, such as industrial atmosphere or heavily polluted areas, timely cleaning must be done to avoid corrosion. Of course, in addition to cleaning the connection materials,it is not enough. In high-pressure equipment and pipes, there must be a variety of flange materials, such as copper, aluminum, 10 steel, stainless steel Lens type or other shape metal gasket made of steel,etc. The flange material is important to flange sealing.
The flange shows important performance and value in specific application field, fully grasps specific operation and contribution, and is generally applicable to the occasions with temperature lower than 120 ℃; for the occasions with pressure lower than 5MPa, the acid resistant asbestos plate is commonly used for general corrosive medium. The contact width between high-pressure gasket and sealing surface is very narrow (line contact), and the machining finish of sealing surface and gasket is high.
In addition to the high requirements for the material finish, polyurethane, whether stainless steel flange or heat-resistant steel plate, austenitic type steel plate has good comprehensive performance, with sufficient strength, excellent plasticity and low hardness, which is one of the reasons why they are widely used. Pneumatic actuator is a kind of ring made of material which can produce plastic deformation and has certain strength. Most of the gaskets of the valve test press are cut from non-metallic plates, or made by professional factories according to the specified size, and the materials are asbestos rubber plate, asbestos plate, polyethylene plate, etc.; there is also a spiral wound gasket made of thin steel tape and asbestos tape. Under different pressures.
The flange has different thickness and uses different bolts.
Therefore, the flange connection is only a part of the equipment, such as the connection between the flange and the water pump, so it is not good to call the water pump “flange parts”. Photoelectric switch water pump and valve, when connected with the pipeline, parts of these equipment are also made into corresponding flange shape, also known as flange connection.