When it comes to Fran, many friends may not be very familiar with it, and we don’t see it very much in our daily life. I am also very curious about this name. Even I have mistaken this name for some kind of food or gourmet. name.
In fact, the name of flange is a transliteration of flange, which was first proposed by an Englishman named Elchart in 1809, and also proposed the casting method of flange at the same time, but there was no such thing for quite a while later. Widely used, until the beginning of the 20th century, flanges were widely used in various mechanical equipment and pipeline connections.
What is a flange
Flanges are also called flange convex discs or convex discs. For those who are engaged in mechanical or engineering installation, flanges should be very familiar. It is a disc-shaped part and is usually used in pairs.
It is mainly used for parts between pipes and valves, between pipes and pipes, and between pipes and equipment, which are connected to each other to play a sealing role. Because there are many applications between these equipment and pipes, it will be The two planes are connected by bolts and the connecting parts with sealing effect are called flanges.
Generally, there are round holes on the flange for fixing. For example, when using at the joint of the pipeline, add a sealing ring between the two flanges, and then tighten the connection with bolts. Flanges with different pressures have different pressures. Different thicknesses and different bolts are used. The main materials used for flanges are carbon steel, stainless steel and alloy steel, etc.
Due to the important role played by the flange and its good comprehensive performance, it is widely used in chemical, petrochemical, fire-fighting and drainage industries.
Flanges are widely used in the world as a connecting piece, which requires a unified standard. For example, there are two main standard systems for pipe flanges.
They are the European pipeline flange system, that is, the European pipeline flange system represented by German DIN (including Russia), and the American flange system represented by American ANSI pipeline flange.
In addition, there is Japan's JIS pipeline flange system, and China also has a steel pipeline flange system GB, but the main dimensions are still based on the European system and the American system.
