I have recently joined a N2 Plant , Liquid Nitrogen produced can be accumalated in either of the 2 LIN vessels , Nitrogen Header Pressure to be maintained is 5.5kg/cm2 and Pressure of MP colum is around 7 Kg/cm2 , for LIN vessel recieving Liquid Nitrogen Rundown to maintain flow from the MP column , a slight atmospheric venting is maintained , to keep pressure below 7 kg/cm2 . I feel this venting is really a waste of money .
Is this done in other Nitrogen plants as well , can it be avoided.??