erensan°
“The Heating Engineer”
- 39 –
280111
voltages should be preferred and electricity connection
work should be done outside the boiler.
Inspection and maintenance of internal surfaces
• Internal surfaces of the pressurized boiler parts are
inspected to control the suitability of the chemical
specifications of the feedwater and the boiler water
being used. Before entering the boiler for this purpose,
the door must have been opened and the boiler should
have been aired thoroughly.
• In boilers with flame pipes, pipes should be controlled,
lighting their insides to ensure they are clean and free of
blockage.
• Pipes should not be damaged any way during
mechanical washing and cleaning.
Inspection of the outer surfaces and other parts
• The boiler should be inspected from outside to ensure
that there are no breaks, welding tears at any part due
to heating.
• All pipes must be cleaned with a suitable steel mop.
• All detected leaks and drains should be removed.
Excessive force should not be applied while tightening
for this purpose and if the leak does stop in spite of
tightening, the leaky places should be opened and new
gaskets should be placed after cleaning. While removing
gaskets on shiny parts, care should be shown not to
scratch these surfaces.
• The valves, pipes, pipe connection fittings and outer
pipes on the boiler and boiler hardware should be
inspected for leakage.
• Manholes known to leak should be passed from
maintenance and existing leaks should be removed.
• If the chimney is directly above the boiler or boiler
construction, measures taken to prevent rainwater from
the chimney entering and corroding the boiler should be
controlled.
• The steel construction, the steel platforms and stairs,
boiler wall pipes, carrier supports, pipe suspension bars
erensan
°
“The Heating Engineer”
- 40 –
280111
should be controlled to see if dislocations and bends
exist.
• Water level glass and position should be inspected to
see if dislocations exist
• During maintenance and inspection, the boiler and its
surroundings, air channels, chimney bottom, burners,
boiler front, fuel hardware and control devices should
always be kept clean. The tools and kits to be used
during maintenance should not be scattered around in a
disorderly manner.
Cleaning of internal surfaces
• Before starting to operate a boiler whose installation has
been completed, rust, corrosive substances, grease
leftovers, organic substance leftovers, protective paint,
welding electrodes, and other extraneous materials
leftover from installation should be cleaned as
thoroughly as possible.
• Surfaces that are in contact with water and steam
during boiler operation should be cleaned of substances
such as oil, grease, oil acids, rust, and paint.
• Help must be obtained from expert institutions for
chemical cleaning of the boiler.
• If the boiler will be kept out of operation for a period of
time, it should be fully cleaned as in weekly cleaning and
the surfaces should be cleaned with soda solution to
remove acidity. If deposits have formed a layer, soda
solution cleaning should be repeated as many times as
required. Sufficient cleaning of sulphur may be tested
with pH paper (pH value should be 7–9). Acid removal
operation should be performed when the boiler is at a
temperature of 50-60
o
C. When this process is
completed, surfaces are left to dry and then linseed oil,
turpentine and graphite are sprayed to prevent oxidation
of metallic surfaces. The boiler doors should be closed to
isolate it from air. In addition a container of half active
lime is placed in the boiler to keep the air inside boiler
dry.
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