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Flanges are used in pairs in piping and with matching flanges on valves. In pipeline manufacturing, Flanges are mainly used for the link of pipelines. In the pipelines that need to link, various devices have flanges. Steel wire flanges can be used for low-pressure pipelines, and welding flanges with pressures greater than 4 kg can be used. Add a gasket between the two flanges, and then tighten with bolts. Flanges with different pressures have different thicknesses and use different bolts.

In particular, rubber joints are made of flanges, and sometimes they need to be matched with flanges. Rubber joints are mainly used for the improvement and transportation of raw water and sewage, water supply and cooling circulating water in thermal power plants, condensate water in metallurgical industry and chemical industry, pipeline transportation in chemical industry, cooling and dilution in petrochemical industry, etc. Flexible connection between short spaced pipelines.

my country's current flange specifications are divided into two major systems, namely PN series (European system) and Class series (American system), and the nominal pressure level of the PN series is represented by PN. The flange is to use flanging, steel ring, etc. to put the flange on the pipe end, and the flange can move on the pipe end. The steel ring or flange is the sealing surface, and the function of the flange is to keep them tight.

The flange is a movable flange part, which is generally equipped on the water supply and drainage accessories (usually on the elastic joint). When the manufacturer leaves the factory, there are method three at both ends of the elastic joint, and the spare bolts are connected. This is a flange with a looper. Usually used on pipes. In this case, if you loosen the bolt, you can turn the ends of the pipe and tighten it. It is convenient to fold and install the pipe.