Here are the general steps involved in a CIP process in a brewery:

Pre-rinse: The equipment is first rinsed with water to remove any loose debris, such as grain or hops.

Alkaline cleaning: An alkaline cleaning solution, usually containing sodium hydroxide, is circulated through the equipment to dissolve any organic matter, such as yeast or protein, that has adhered to the surfaces.

Rinse: The equipment is then rinsed thoroughly with water to remove any remaining cleaning solution.

Acid cleaning: An acid cleaning solution, usually containing phosphoric acid, is circulated through the equipment to remove any mineral deposits, such as calcium or iron, that have accumulated on the surfaces.

Rinse: The equipment is again rinsed thoroughly with water to remove any remaining cleaning solution.

Sanitization: A sanitizing solution, usually containing a combination of hydrogen peroxide and peracetic acid, is circulated through the equipment to kill any remaining microorganisms that could contaminate the beer.

Final rinse: The equipment is given a final rinse with water to remove any remaining sanitizing solution.

Post-rinse: Finally, the equipment is inspected to ensure that it is clean and ready for use in the brewing process.