Step K: When the water washing has been completed, it must be ensure that all thewashing water is drained away by looking into the inlet box from theinspection door. The bottom of the inlet box must be cleaned with alkalinewater because the washing water is very corrosive. It must be observed thatall the washing water and loosened deposits are removed from the boiler.Step L: The boiler must be dried out immediately after water washing by having anatural air circulation through the boiler or by heating it up with feed water.This is because soot formations produced by the combustion process in theengine contain sulphur compounds. Any residual soot and water willtherefore react chemically to form a highly corrosive sulphuric acid.Step M: Remove the waterproof tarpaulin from the exhaust gas inlet pipe, ifinserted, and close drains as well as inspection doors.Step N: The boiler can now be brought back into normal service.
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