SHELL & TUBE HX CLEANING PROCEDURES
We use manufacturing safe chemical products and solutions for a complete rehabilitation/ maintenance and cleaning of your industrial shell and tube heat exchangers.
ISOLATE AND DRAIN ➜ Isolate and drain the water-side of the exchanger to be cleaned. Place a 1.0'' ball valve between the isolation valves and the heat exchanger on both the supply and return.
DE–SCALING WORKS ➜ Attach the chemical pump and hoses so the descaling chemical will be pumped in the bottom or supply, and back out the top or return. Begin pumping all the required descaling chemical into the exchanger. Once that is accomplished, begin to add water to complete the circulation. Please note: The calcium deposit will take up volume within the heat exchanger, so you will not be able to add the same amount of water in the beginning.
CIRCULATING THE CHEMICAL SOLUTION ➜ Continue circulating the solution for the recommended amount of time. As the circulation progresses and the product dissolves the deposits inside the unit, the volume will increase. To account for the increase in volume, please add water to the circulation vessel, as needed. If you begin adding a lot of water, please be aware, it is possible there is a leak in the system.
MONITORING OF THE pH SOLUTION ➜ It is a good idea to periodically check the effectiveness of the solution while circulation is in progress. This can be accomplished by utilizing a pH meter and as long as the solution retains a low pH, the product is active. Should the circulatiing solution reach a pH of 5.5 to 7.0 before the recommended time is up, you will need to add more descalng chemical and possibly extend the circulation time.
CHEMICAL PURGING ➜ Upon completion of the recommended circulation time, the solution may be purged to a normal sewer and flushed with water. This process is completed by placing the return hose in the drain and adding water to the circulation container until the discharge line runs clear.
EXTERNAL CLEANING WORKS ➜ Cleaning the outside of heat exchanger/ external bundle cleaning.
ENDORSEMENT OF THE HEAT EXCHANGER ➜ The unit is ready to be returned to service.
