What Causes Scale Deposits?

     Scale deposits are hard dirt-like residues that often adhere firmly to surfaces regularly in contact with water, such as boilers, steam generators, drain pipes, bathrooms, faucets, etc. Scale deposits require proper cleaning methods because otherwise, they become difficult to remove. The causes of scale deposits are as follows:
     • Scale deposits from the crystallization of mineral solutions such as limestone compounds like calcium and magnesium, which naturally determine water hardness. When heated, these minerals crystallize and form scale deposits.
     • Scale deposits from organic substances arise from proteins and carbohydrates in food, which precipitate into dirty deposits when heated.
     • Scale deposits from microorganisms such as bacteria, yeast, or mold. These microorganisms produce mucus to protect themselves, and when accumulated over time, form a film-like layer that strongly adheres to surfaces, making cleaning difficult. This is sometimes called biofilm.

Chemicals for Boiler Scale Removal
 
 

How to Remove Scale Deposits from Boilers:

     1. Open the header to check the thickness of the scale to estimate the chemical mixture needed.
     2. Circulate with chemical descalers directly targeting the scale and circulate according to the scale thickness and dirt amount.
     3. Dilute and adjust the pH before releasing the water.
     4. Clean the boiler by water jetting.
     5. Drain water and add corrosion inhibitors to protect the metal surface.
     6. Close the header and refill the boiler with water.
     7. Perform a water pressure test.
     8. Adjust the safety valve.
     9. Test operation by igniting to evaluate the boiler's combustion efficiency.

     Therefore, if you want to remove scale deposits, you can purchase boiler chemicals or products from Thai Hirakawa Co., Ltd.. The company is an authorized distributor of high-performance Japanese boilers, offering steam generator installation services for all types of industrial applications. Our products are internationally recognized for quality and standards under the brand "MP Boiler." We are happy to provide consultations and services to ensure projects meet budgets and customer requirements to deliver maximum benefits. For more products or services, please click here.
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