In the field of industrial pipe connection, flanges, as an important component of connecting pipes, bear important functions such as connection, sealing and support. Different types and codes of flanges and their sealing surface forms play different roles in pipeline systems. Let's explore the functions and characteristics of various flange types and codes and different flange sealing surfaces:

Flange type and code:

Flat welded flange (PL) : characterized by flat connection parts, easy welding, suitable for general industrial pipeline system.

Flat welded flange with neck (BL) : with flange neck characteristics, suitable for high temperature, high pressure piping systems, for connecting flanges to pipes or valves.

WN with neck welding flange (WN) : with neck welding flange, suitable for high temperature, high pressure pipeline system, connection more firm, safe and reliable.

Integral flange (IF) : integral flange, suitable for some special occasions or special requirements, with good pressure resistance and corrosion resistance.

Welding flange (SO) : Flange for sliding connection, suitable for general industrial piping system, easy to install, can be quickly disassembled.

Threaded flange (TH) : Through threaded connection flange, suitable for low pressure, low temperature, small diameter piping system.

Butt welded ring loose sleeve flange (SR) : butt welded ring loose sleeve type flange, suitable for general industrial piping system, easy to install, with good sealing.

Flat welded ring loose sleeve flange (SP) : flat welded ring loose sleeve type flange, suitable for general industrial pipe system, easy to install, good sealing performance.

Flange cap (BL) : A cover plate used to seal the flange connection, often used to temporarily close piping systems.

Lining flange cover (BG) : Flange cover with lining material to protect against media leakage and corrosion.

Flange sealing surface:

Different types of flanges have different sealing surface forms, common sealing surface forms include plane sealing surface, convex sealing surface, concave sealing surface and so on. These sealing surface forms are selected according to the working conditions and medium characteristics of the pipeline system to ensure the sealing performance and safety and reliability of the pipeline connection.

To sum up, understanding the different types and codes of flanges and different forms of flange sealing surfaces is of great significance for the correct selection and use of flanged connectors. In the design, installation and maintenance process of the pipeline system, we will select the appropriate type and form of flange and sealing surface according to the specific engineering requirements and media characteristics, to ensure the safety and reliability of the pipeline connection, and provide reliable protection for industrial production.