Different sizes of flange connections
The size of the diameter Flange and the diameter Flange is different from the standard Flange diameter. In engineering, use the variable diameter flange when the standard flange cannot match the pipe and pipe. Flange standard of our country has the national standard (GB) and chemical industry standard (HG) two categories, the latest chemical industry in the flange standard HG/T20592 ~ 20635-20635 and adopted by eu EN European tube flange standards (nominal pressure using PN) and the United States represented by the ASME American pipe flange system (nominal pressure using the Class), feature sizes between them in the same nominal size there is also a difference; Furthermore, the series of pipe diameters in China is also a series of metric series and English series, which are also different in the nominal size of the same class. In addition, when there is a special process requirements, such as instrument fittings, glass lining flange of its characteristics and some special requirements (give it another made the glass lining flange diameter "HG/T2140-2009 standard). Therefore, in the inevitable mixed appeared on the engineering situation, reduce the size of the flange diameter method is the simplest and the most effective solution, thus appeared the non-standard adapter flange.
Flanges, or flanged flanges or flanges. The flange is the part of the pipe that is connected to the pipe and is used for the connection between the end of the pipe. Also useful for the flange of the equipment import and export, for the connection between two devices, such as reducer flanges. Flange connection or flanged joint, which refers to the disconnection of a combination of flange, gasket and bolt. The pipe flanged flanged is a fitting flange for the piping device, which is used to refer to the equipment's import and export flanges. There are holes in the flanges, and bolts make two flanges. The flange is sealed with gasket. Flange threaded connection (thread connection) flange, welding flange and clamp flange. The flanges are used in pairs, and the low pressure pipe can be used with wire flanges, and the welding flange is used for more than four kilograms of pressure. Between two flanges, add a gasket and tighten the bolt. The flange thickness of different pressure is different, and the bolts they use are different
The flange is standard, according to the different pressure levels, different specifications of the flange, there is a clear of bolt quantity and the size of the bolt, bolt hole has a standard size. If the size of the outside diameter is not large enough, the diameter and aperture of the bolt hole can be unified. If the specifications are too wide to be directly connected, use the size head as an excess.
If the size of the outside diameter is not large enough, the diameter and aperture of the bolt hole can be unified. If the specifications are too wide to be directly connected, use the size head as an excess.
