Description: Alphanumeric designation (starting with DN) of size for components in a piping system, used for reference purposes; Name: Nominal size socket/pipe
Description: Alphanumeric designation (starting with DN) of the size for components in a pipeline system, used for reference purposes; Name: Nominal size of nozzle/pipe
Description: Determined total head at the inlet area of the installation, which corresponds to the sum of geodetic head, pressure head and velocity head; Name: Total head at inlet area of the installation