Flange connection is an important connection method for pipeline construction.

Types of flanges are divided into threaded flanges, welded flanges and loose flanges according to the fixing method of flanges and pipes; according to the form of sealing surface, they can be divided into smooth, concave and convex, tongue and groove, lens and trapezoid formula.

Generally, low-pressure small-diameter wire-connected flanges, high-pressure and low-pressure large-diameter welding flanges, the thickness of flanges with different pressures and the diameter and number of connecting bolts are different.

According to different levels of pressure, flange gaskets also have different materials, from low-pressure asbestos gaskets, high-pressure asbestos gaskets and PTFE gaskets to metal gaskets.

The flange connection is easy to use and can withstand greater pressure.

Flange connection is widely used in industrial pipelines. For example, in the indoor fire hydrant water supply system, various valves such as butterfly valves, gate valves, and check valves are connected to pipelines.