- Sudden pitting suggests major change in operation or conditions.
- Need immediate correction as 1mm loss/year is very significant [especially on small thin-walled boilers and tubes].
- Could be due –
a a) to leaking valves or rain [if external corrosion]. Then
b fix leaks and paint.
b) loss of feed water control, condensate, oxygen, chemicals [if internal corrosion of shell or tubes]. Correct changes.
c) may be others. Investigate further if needed.
- Record briefly and advise client as above.
a a) to leaking valves or rain [if external corrosion]. Then
b fix leaks and paint.
b) loss of feed water control, condensate, oxygen, chemicals [if internal corrosion of shell or tubes]. Correct changes.
c) may be others. Investigate further if needed.