P280GH related technical knowledge of welding flange
Material of P280GH flange with neck and circular pipe flange.welding flange is one of flange pipe fittings, which is widely used and promoted in different fields and industries. P280GH it is used in different ranges, needs different environments, and needs to be used according to certain conditions. P280GH welding flange includes long neck welding flange, flange, etc. It is mainly applicable for the pair welding of flange and pipe. Its reasonable structure, large strength and stiffness, can withstand high temperature, high pressure and repeated bending and temperature fluctuation; while its sealing performance is reliable, the welding flange with nominal pressure of 0.25~2.5MPa adopts concave and convex sealing surface. The P280GH pair welding flange is suitable for the steel pipe connection with a nominal pressure of not 2.5MPa, which plays an important role and value in the link of pipes, but the nominal pressure must be in a certain range in use. The sealing surface of P280GH welding flange can be made into smooth type, concave and convex type and mortise and groove type, smooth application of welding flange, mostly used in the case of moderate medium conditions, such as low-pressure non-purified compressed air, low-pressure circulating water, it is its advantage is relatively cheap. The P280GH pair welding flange is suitable for pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature, and is also used for pipelines conveying expensive, flammable and explosive media. At present, P280GH pair welding flange is widely used and promoted in pipe fittings, because the scope of application and use environment are different, therefore, need to be used in the corresponding way and method. The forging process of P280GH for welding flange generally consists of the following processes, that is, selecting excellent billet feeding, heating, forming, and cooling after forging. The forging process includes free forging, die forging and tire film forging. When production, according to the quality of forging, the number of different casting methods.
