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Introduction of threaded flanges and precautions for their use

A flange is a part that allows the shaft to be connected to each other and the two devices to be connected together, which is more important in the piping system. We also all know that there are many ways to classify flanges, which can be classified according to the material of the flange, whether the flange can be classified according to the standard or not, and can be classified according to the standard when the flange is produced… If you are careful enough, you will find: whether it is Chemical industry standards, petrochemical industry standards, machinery industry standards, or national standards, all flanges produced according to these standards have threaded flanges. So, what is a threaded flange? How to use threaded flanges?

Threaded flange, as the name implies, is to process the hole in the middle of the flange, process the smooth hole into a pipe thread, and then use this threaded flange with a threaded pipe, which is a non-welded flange. Because the connection method between the threaded flange and the pipeline is not by welding, but by threaded connection. When installing, wrap the processed threaded pipe with lead oil and tighten the threaded flange, so the thread method is used. The advantage of the blue is that it can be disassembled and tightened, which is more convenient for cleaning and maintenance of the machine.

FTE threaded flanges

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

(1) The size and specifications of threaded flanges required for different machine installations and facilities with different specifications are different. Therefore, in order to unify the standard, the country has set the standard size of threaded flanges, such as: the inner diameter is 48 Threaded flanges ranging from 408.6 mm to 408.6 mm meet the conditions of wide use, so such threaded flanges are widely used. Generally, the outer diameter of the flange is about 50-840 mm, the thickness of the bolt is 14-52 mm, and the bolt The hole distance is 4-36 mm, which is written in the flange specification table.

(2) The use of threaded flanges requires threaded pipes, and in order to meet the size of threaded flanges, threaded pipes also have a corresponding wide range of specifications. These threaded pipes are generally made of the same materials as threaded flanges. Consistent quality with full effect.

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

Well, the above is the introduction of the threaded flange, especially the precautions when using the threaded flange. I hope you can use it correctly so that it can better play its sealing role.


Post time: Mar-02-2022