Non-standard flange refers to a flange that is different from the standard flange size and connection method. The standard flange is formulated according to international standards or industry standards, with a unified size and connection method, which is convenient for the connection of equipment and pipes of different manufacturers. Non-standard flanges are designed for specific needs and may not be consistent in size and connection to the standard.

Pressure vessel flange is a connection device installed on a pressure vessel to connect pressure vessels with pipelines, valves, equipment and other components. It plays the role of bearing, sealing and connecting, and is an important part of the safe and stable operation of pressure vessels.

Flanges are widely used in various industrial fields and equipment for connection and sealing, it should be noted that different industries and processes have different flange standards and requirements.

A standard flange is a standard fitting used to connect pipes, valves, equipment, etc. It has two types: fixed and removable, common welding flange, threaded flange, clamping flange, etc.