Performance And Characteristics Of Butt Flange

Butt flange is a common disk-like parts, especially in the pipeline engineering is the most common, butt flange manufacturers are pairs and with the valve on the matching flange application. Butt flange characteristics in pipeline engineering, flanges are primarily used for pipeline connections. In the demand of the pipeline, a variety of devices, a flange, low pressure pipe can be used to connect the flange, more than 4 kg pressure of the use of welding flange. Add a gasket between the two flanges and tighten with bolts.　Different pressure flanges have different thicknesses and use different bolts. Butt flanges and valves, when connected with pipelines, the parts of these devices are also made into corresponding flange shapes, also known as flange joins. Hebei Butt Flange General in the two plane in the vicinity of the use of bolts to connect the closure of the joint parts, usually referred to as "flange", such as the connection of ventilation ducts, this type of part can be called "flange parts." But this connection is only a part of the equipment, such as the connection between the flange and the pump, it is not good to the pump called "flange-type parts." Relatively small such as valves, can be called "flange-type parts."

Butt flange is a kind of ring which can produce plastic deformation and have certain strength. Most of the gaskets are made from non-metallic plates, or by a professional factory in a regular size, the material is asbestos rubber plate, asbestos plate, polyethylene board, etc., also use thin metal plate (tin, stainless steel), asbestos and other non-metallic materials wrapped up in the metal package gasket; The shape and roughness of the flange seal surface of carbon steel should be matched with the gasket, General contact with the metal gasket sealing surface, requiring high dimensional accuracy, Hebei butt flange non-metallic and soft gasket sealing surface precision can be lower, roughness can be lower. However, the sealing surface is necessary to avoid radial mechanical nicks and other mechanical damage. The flatness of the sealing surface and the straightness of the sealing surface and the flange axis are the precondition to ensure the uniform pressure of the gasket, in addition, it is necessary to consider the influence of the thrust or the eccentric force caused by the piping thermal expansion in the planning and installation. The influence of the flange stiffness of American Standard

The rigidity of butt flange is too large to warp deformation, which is one of the reasons for sealing failure. Large stiffness of the flange deformation is small, and can make the bolt preload evenly pass to the gasket, progressive flange sealing performance. But the flange stiffness is related to many factors, in the meantime increase flange thickness, reduce the bolt center circle diameter, can improve the flange bending stiffness and deformation resistance.