1. Matched flanges have the same specifications and models;When connecting with equipment flange, it should be matched according to its specifications;

2. When the flange is connected, it is coaxial and parallel, and the flange surface is perpendicular to the center of the pipe;
 

3. The fastening bolts have the same specifications and direction, and the exposed length of bolts is 1/2 bolt diameter or flush with the nut;

4. Put the nut on the side of the valve when connecting the valve;

5. The top two screw holes of the horizontal pipe flange should be kept parallel with the wall.

Flange connection is the two pipes, pipe fittings or equipment, first fixed on a flange plate, between the two flanges, coupled with flange pad, bolted together to complete the connection.Some pipe fittings and equipment have their own flanges, which are also flange connections.Flange connection is an important connection mode in pipeline construction.Flange connection is easy to use and can withstand large pressure.