What is the difference between flat welding flange and butt welding flange?
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-Time:2020-01-03 08:52
1. The application scale of flat welding flange is different from that of butt welding flange. Flat welding flange is widely used for the connection of carbon steel pipe with pressure less than 2.5MPa. The sealing surface of flat welding flange can be considered as three types: lubrication, height and tenon groove. Among them, the lubrication type flat welding flange is widely used, most of which are used in the case of moderate medium conditions, such as low-pressure circulating water pipeline 。 The butt welding flange is suitable for the pipeline with high pressure and temperature, or the pipeline with high pressure and low temperature. It is also used to transport the pipeline with expensive quotation, inflammable and explosive medium. Because the sealing character of butt welding flange is good, it is not easy to deform, and it can accept larger pressure, and the pressure scale is within 16MPa.
2. The welding method of the flat welding flange is different from that of the butt welding flange. The flat welding flange only needs to weld one side of the flange instead of the inner opening connecting the pipe and the flange, while the butt welding flange needs to weld both sides, so the butt welding flange reduces the appearance of stress concentration.
3. The quotation of flat welding flange is different from that of butt welding flange. Because the manufacturing technology of flat welding flange is relatively simple, the quotation is relatively cheap.
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