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: Probability that an item is in a state to perform as required at a given instant, under given conditions, assuming that the necessary external resources are provided ; Name: Instantaneous availability