BCACBoiler Cleaning Assessment Centre

Our Key Deliverables

What you receive from BCAC

🔬

Laboratory Analysis

  • Precise tube deposit density measurement (mg/cm²)
  • Chemical composition of deposits
  • Tube cleaning trials
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Professional Evaluation

  • Cleaning decision — required or not, and when?
  • Single-stage or multistage cleaning — how?
🧬

Tailored Solution

  • Customized solvent package with formulations for complete removal of deposit while protecting the base metal
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Cleaning Procedure & Requirements

  • Step-by-step procedure for chemical cleaning, passivation and disposal of spent solvents
  • List of bulk quantity of chemicals required for cleaning, passivation and neutralization of spent solvents before disposal

Cleaning Packages

Different chemical cleaning packages

Single-stage cleaning

  • HCl cleaning without copper complexor
  • HCl cleaning with copper complexor
  • Citric acid cleaning for iron or iron & copper removal

Two-stage cleaning

  • Exclusive copper removal stage followed by iron removal stage
  • Repeat of single-stage cleaning

Multi-stage cleaning

  • Repeat combinations of the above based on deposit morphology
  • Alkali boil-out / degreasing may precede acid cleaning
  • Inhibitor evaluation tests may be undertaken

Standards & Decision Criteria

When does a boiler need cleaning?

Chemical cleaning formulations are based on HCl or citric acid. BIS:10391-1994 calls for chemical cleaning of a boiler when the tube deposit quantity exceeds 40 mg/cm², while EPRI recommends different deposit-quantity criteria based on drum operating pressure.

In a real sense, the cleaning decision depends on tube deposit density (mg/cm²), the ease of cleaning (established through cleaning trials) and the number of under-deposit corrosion boiler tube failures.

After a few years (5 or 6) of operation, it is better to create a record of water-wall deposition-rate history by conducting deposit density measurement once every 2 years.

Decision factors

  • Tube deposit density (mg/cm²)
  • Ease of cleaning from trials
  • Number of UDC tube failures
  • Drum operating pressure (EPRI)
  • Deposit morphology & characterization

Proven Results

Results of cleaning trials

Before-and-after tube samples demonstrate complete deposit removal while protecting base metal.

Before Cleaning
Before Cleaning
After Cleaning
After Cleaning
Before Cleaning
Before Cleaning
After Multi-Stage
After Multi-Stage Cleaning
Before Cleaning
Before Cleaning
After Cleaning
After Cleaning

Note: replace these placeholders with your actual before/after tube sample photographs from the brochure.

Need a customized cleaning assessment?

Send us your tube samples and we’ll determine the optimal solvent package for your unit.

Request an Assessment