Flanges are components that connect shafts to each other, primarily used for connecting pipe ends. Therefore, they are still widely used in daily mechanical equipment. However, due to the different shapes of each pipe end, there must be certain criteria when selecting single head bolts. Next, the editor will guide you on how to choose single head bolts based on flanges.
Due to the use of single head bolts for flanges, hexagonal bolts and nuts are usually used for flanges. Hexagons are commonly used and can be divided into two types: single chamfered and double chamfered. The detailed analysis is as follows: bolts are divided into single head bolts and double head bolts according to their appearance. Single head bolts only have threads machined on one end of the screw, while the other end is the screw head connected to the screw body.
Single head bolts for flanges are usually hexagonal bolts. The two ends of the double headed bolt are threaded and have a cylindrical shape. When the tightening force is high, single head bolts are prone to fracture at the joint between the screw and the screw head, so they cannot be used on medium and high pressure flanges. Double headed bolts can not only be used on medium and high pressure flanges, but also facilitate double-sided tightening.
Bolts are divided into rough bolts, semi refined bolts, and refined bolts according to their manufacturing methods. Except for the threaded part, the surface of other parts of the rough bolt does not stop precision machining, resulting in a rough rough rough shape. Bolts are mostly made of plain carbon steel, which does not receive high tensile force. Semi refined and refined bolts need to be stopped from processing, and some even need to stop heat treatment. They are mostly used in the manufacturing of high-quality carbon steel or alloy steel, so they have high tensile strength and high temperature resistance.
