CIP Program Steps
|Typical Tank Program||Typical Line Program|
Significant Differences Between Tank and Line Circuits
(1) Lines can be rinsed in one continuous step and require no “burst” rinses and drains to minimize water use. Approximately 1-1/2 times the volume of the circuit will accomplish all that can be rinsed with water, except for the final Rinse to Resitivity which may reach 5-7 times the volume of the circuit, depending upon the number and size of dead-legs in the piping. Dead legs can only be rinsed by dilution, either continuous, or repetitive filling and emptying. See Ask Dale.
(2) The most effective use of water for Line circuits is accomplished when the transistion from Rinse to Recirculate involves only closing the Drain Valve and establishing recycle to the Solution Tank.
(3) There is no need for an Air-Blow between the Alkali Wash and the subsequent Post Rinse for Lines. Simply stop recycle, open the Drain valve and push the alkali solution out with the initial portion of the Rinse.
(4) Repeat (3) for the transition to an Acid Rinse or Wash (with Heat) step.
(5) There is no need for an Air-Blow between the Acid Rinse or Wash and the subsequent Post Rinse or Rinse to Resitivity for Lines. Simply stop recycle, open the Drain valve and push the previous solution out with the initial portion of the Rinse.
(3) There is a need for an Air-Blow at the end of the CIP Program to totally evacuate the circuit.