Introduction of flange bolts

Flange bolt is a special bolt, which is mainly composed of three parts: hexagonal head, flange (the part under the hexagonal gasket and the hexagonal fixed as one) and screw (cylinder with external thread). This bolt needs to be used in conjunction with a nut and is mainly used to fasten and connect two parts with through holes, so its connection is a detachable connection.

Flange bolts come in a variety of classifications and characteristics. From the perspective of hexagonal head types, there are two types: flat brain and concave brain. According to the surface color, flange bolts can be plating white, army green, color yellow, corrosion-resistant Dacromet and other different colors. According to the characteristics of the flange, there are flat bottom and toothed, among which the flange bolt with tooth has anti-slip effect. In addition, according to the force mode of the connection, the flange bolt can be divided into ordinary type and reamed hole type, in which the flange bolt for hinged hole needs to match the size of the hole, which is suitable for the scene of transverse force.

Flange bolts have some advantages in structure and performance. Because its "ratio of support area to stress area" is greater than that of ordinary bolts, it can withstand higher preload and has better anti-loosening performance. This makes flange bolts widely used in automotive engines, heavy machinery and other occasions that require high-strength and stable connections.

In the manufacturing process, the material selection and process treatment of flange bolts are very important. Carbon steel is a commonly used bolt material because of its good strength and ductility, but poor corrosion resistance. In order to improve its performance, surface treatments such as galvanizing, spraying, and oxidation may be required. The manufacturing process typically includes steps such as wire preparation, heat treatment, cold heading, turning, tapping, surface treatment, and quality checks.

In practical application, flange bolts have a wide range of applications in thermal transmission pipelines, water supply and drainage pipelines, wind and smoke pipelines, and petroleum, chemical and other chemical media transportation pipelines. They are used for pipeline connections, valve connections, etc., to ensure the stable and safe operation of the system.

Overall, a flange bolt is a powerful and widely used fastener, and its unique structural and performance characteristics make it play an important role in a variety of engineering fields. For more detailed information, it is recommended to consult the relevant mechanical design manual, engineering materials manual or consult a professional mechanical engineer.