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Reg. 390 d
Stays
| All stays, whether diagonal or through,
shall be examined to note that they are in even tension.
All fastened ends shall be examined to note whether cracks
exist where the stays are punched or drilled for rivets
or bolts and, if not found in proper tension, the Inspector
should recommended their proper adjustment. |
Reg. 390 e
Manholes and other Openings
| The manhole and other reinforcing plates,
as well as nozzles or other connections flanged or screwed
into a boiler, shall be examined internally as well as
externally to see that they are not cracked or deformed,
and wherever possible observation shall be made from the
inside of the boiler, as to the thoroughness with which
its pipe connections are made to the boiler. All openings
to external attach-pipe connections are made to the boiler.
All openings to external attachments, such as water column
connections, openings in dry pipes and openings to safety
valves, shall be noted to see that they are free from
obstructions. |
Reg. 390 f
Fire Surfaces.-Bulging, Blistering, Leaks
| Particular attention shall to given to
the plate or tube surface exposed to the fire. The Inspector
shall observe whether any part of the boiler has become
deformed during operation by bulging or blistering; the
former is a distortion of the entire thickness of the
plate or tube where it takes place, while the latter is
a lamination or separation of the plate due to foreign
material being embedded in the ingot before the plate
is rolled. If bulges or blisters are of such size as would
seriously weaken the plate or tube and especially when
the leakage is noted coming from those defects, the boiler
shall be discontinued from service until the defective
part or parts have received proper repairs. Careful observation
shall be made to defect leakage from any portion of the
boiler structures, particularly in the vicinity of seams
and tube ends. Fire tubes sometimes blister but rarely
collapse; the Inspector should look through the tubes
for such defects and if they are found with a sufficient
degree of distortion they should be removed. |
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