Precautions for use of threaded flange!

　　Because the connection method of threaded flange and pipe is not welding, but threaded connection. During installation, the processed threaded pipe should be wrapped with hemp and lead oil, and the threaded flange should be tightened. Therefore, the advantage of using threaded flange is that it can be removed and tightened, and it is more convenient for cleaning and maintenance of the machine.

　　However, in order to make the threaded flange play its proper sealing role, it is also necessary to pay attention to some things when using the threaded flange, such as:

　　The size and specification of threaded flange required by different machine installation and different specifications of facilities are different. Therefore, in order to unify the standard, the country has determined the standard size of threaded flange, such as threaded flange with inner diameter ranging from 48 to 408.6 mm, which meets the conditions for wide use. Therefore, such threaded flange has a wide range of use. Generally, the outer diameter of flange is about 50-840 mm, and the bolt thickness is 14-52 mm, Bolt hole spacing is 4-36 mm, 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 effect of consistent quality and complete equipment.

　　At present, threaded flanges and threaded pipes are basically made of steel. Because the steel material has strong compression resistance and is not easy to break during installation, it is very convenient. At the same time, its corrosion resistance is better than 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 ℃.