P.U.(A)
5/70
FACTORIES
AND MACHINERY (STEAM BOILER AND
UNFIRED PRESSURE VESSEL)
REGULATIONS, 1970
PART III - UNFIRED PRESSURE VESSELS
Regulation
45. Corrosive service conditions.
Where an unfired pressure
vessel is to be subject to corrosive, abrasive or erosive conditions-
(i) the Chief Inspector
may require that the scantlings of such vessel shall be increased
by an amount which he may
deem appropriate before assigning and authorised safe
working pressure;
(ii) the Chief Inspector
may require that a suitable lining shall be fitted to any part of such
vessel as he may specify
before it is placed in service; and
(iii) an Inspector may
require tell-tale holes to be drilled in the walls of such unfired
pressure vessel. Such
holes shall be drilled to a depth not less than half the calculated
wall thickness less any
corrosion allowance and shall be spaced not more than two feet
apart.
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