Flange PL150-16RF is PL means plate flat welding flange; 150 means nominal diameter 150mm; RF means sealing surface form is protruding surface; 16 is the pressure of 16 kg pressure, that is, 1.6MPa.
Flanges are also known as flange flange disk or protruding edge. Flange is a pipe and pipe interconnection parts, used for the connection between the pipe end; also used in the equipment import and export flange, used for the connection between the two devices.