Introduction of threaded flange and precautions for its use!

　　Threaded flange, as the name suggests, is in the middle of the flange hole processing, the smooth hole processing for pipe thread, and then the threaded flange with the use of threaded pipe, belongs to non welding flange. Because the connection between the threaded flange and the pipeline is not by welding, but by threaded connection. During installation, the processed threaded pipe can be wrapped with hemp, smeared with lead oil, and the threaded flange can be tightened. Therefore, the advantage of using the threaded flange is that it can be disassembled and tightened, which is more convenient for the cleaning and maintenance of the machine.

　　However, in order to make the threaded flange play its proper sealing role, some things should be paid attention to when using the threaded flange, such as:

　　The sizes and specifications of threaded flanges required by different machine installations and facilities of different specifications are different. Therefore, in order to unify the standards, the state has determined the standard sizes of threaded flanges, such as the threaded flanges with inner diameters ranging from 48 to 408.6 mm, which meet the conditions for wide use. Therefore, such threaded flanges are widely used, Generally, the outer diameter of flange is about 50-840mm, the thickness of bolt is 14-52mm, and the distance between bolt holes is 4-36mm, which is written in the flange specification table.

　　(2) The use of threaded flange requires threaded pipe. In order to meet the size of threaded flange, the threaded pipe also has a wide range of specifications. The manufacturing materials of these threaded pipes are generally the same as those of threaded flange, so as to achieve the same quality and complete effect.

　　At present, threaded flange and threaded pipe are basically made of steel. Because the compression resistance of steel material is relatively strong, it is not easy to break in the process of installation, which is very convenient. At the same time, the anti-corrosion performance is relatively good compared with other materials.

　　(3) Although the threaded flange is convenient for the cleaning and maintenance of the machine, it is not suitable for the use of threaded flange under any circumstances. Because the threaded pipe is strongly affected by the environment, and the temperature fluctuation in the threaded pipe is relatively large, it is better to use the welded flange in the environment above 20 ℃ or below - 40 ℃.