Introduction to the sealing surface of 304 flange

In order to ensure the sealing performance of the flange connection, the sealing surface of the pressure gasket of the general pipe flange and container flange is often processed into the following five forms:

1) Plane sealing surface - smooth plane, and sometimes 2~4 grooves (called "leak prevention groove" or "waterline");

2) Concave-convex sealing surface - composed of a concave surface and a convex surface;

3) Tenon and groove sealing surface - composed of a tenon surface and a groove surface;

4) Conical sealing surface - composed of two conical surfaces;

5) Trapezoidal sealing surface - composed of two trapezoidal grooves.

A container flange with a certain nominal diameter is suitable for a container with a certain nominal diameter. Similarly, a pipe flange with a certain nominal diameter is suitable for pipes and fittings with a certain nominal diameter. However, since the nominal diameter of the container is equal to its inner diameter, the nominal diameter of the pipe is not equal to the inner diameter or the outer diameter in general, but is similar to its inner diameter. Therefore, the size of the container flange and the pipe flange of the same nominal diameter are different, and the two cannot be substituted for each other. When a pipe is used as the container cylinder, a pipe flange is used.

   Stainless steel flange flange joints are very common and widely involved parts in metallurgy, chemical industry, petrochemical industry, thermal engineering, industrial furnace, automatic control, water supply and drainage, heating and ventilation engineering design, and are also essential in piping design and key valves. less parts. The flange connection type is suitable for valves, pumps, chemical machinery, petrochemical machinery, pipeline accessories and other equipment.