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Home › Engine Room › Boiler Water Treatment
Operational guide · Safety & equipment

Boiler Water Treatment

Parameters, sampling points, limits, frequencies, chemistry, conductivity/TDS and blowdown must follow the maker/supplier-specific programme incorporated in PMS/SMS; there are no universal six daily tests or 1,000 µS/cm limit.

boiler water treatmentTDSblowdownboiler

Operational Explanation

Parameters, sampling points, limits, frequencies, chemistry, conductivity/TDS and blowdown must follow the maker/supplier-specific programme incorporated in PMS/SMS; there are no universal six daily tests or 1,000 µS/cm limit.

Regulatory Reference

ISM Code 10, boiler maker manual, approved water-treatment supplier programme and PMS/SMS.

Scope of Application

Specific boiler design/pressure, feed/condensate system, chemical programme, sample point, temperature correction and test method.

Procedure / How to Complete It

  1. Use only installed-programme parameters, points and frequencies.
  2. Sample and temperature-correct by prescribed method.
  3. Compare trends and ship-specific limits before dosing/blowdown.
  4. Investigate abnormal trends before changing chemistry or blowdown.
  5. Do not add phosphate, alkalinity builder, scavenger or polymer outside the programme.

Practical Example

A conductivity rise is verified with correct sample point/method; the team investigates contamination before using blowdown minutes or dosing from another boiler.

What Typically Goes Wrong

Imposing six daily tests, declaring polyelectrolyte superior, using 1,000 µS/cm, 15 minutes/watch or universal numerical dosing.

Common Mistakes Mistake Library

MistakeConsequenceHow to Avoid It
Imposing six daily tests, declaring polyelectrolyte superior, using 1,000 µS/cm, 15 minutes/watch or universal numerical dosing.Non-compliant decision or treatmentFollow the approved arrangement and applicable sources

What the PSCO Checks

Evidence of the approved arrangement, procedures, records, competence, defect management and consistency with statutory/class/maker requirements.

Operational Tips

Preparation checklist

FAQ

Which tests are daily?
Only those and at the frequency prescribed by the specific programme.
Is 1,000 µS/cm the limit?
Not universally; use the boiler/programme limit and method.
Is one treatment always superior?
No. Use only the approved chemistry for the plant.

Related Topics

Boiler OperationsPurifiers and Separators

Last substantive revision of this page: 31 August 2026 · page fingerprint 4fbf19e7f652