Damage caused by their own
Explosion or Collapse.
Explosion shall mean the sudden
and violent rending of the permanent structure of the plant by force of
internal steam or fluid pressure or bodily displacement of any part of such
structure together with forcible ejectment of its contetns, except in the case
of a steam test at a pressure not exceeding the maximum pressure permitted by
the inspecting authority the term explosion shall not mean failure under any
test.
Collapse shall mean the sudden
and dangerous distortion of any part of the permanent structure of plant by
bending or crushing caused by force of steam or fluid pressure whether attended
by rupture or not. Except in the case of a steam test at a pressure not
exceeding the maximum pressure permitted by the inspecting authority the term
collapse shall not mean failure under any test.
The following defects do not
constitute explosion or collapse even though repair or replacement may be
necessary :
wearing away or wasting of the
material of the plant whether by leakage, corrosion or by the action of the
fuel or otherwise;
slowly developing deformation or
distortion of any part of the plant;
cracks, fractures, blisters,
laminations, flaws or grooving even when accompanied by leakage or damage to
tubes, headers or other parts of the plant caused by overheating or leakage at
seams, tubes or other parts of the plant;
failure of joints;
but explosion or collapse arising
from any such defect is not excluded hereby.
Exclusion to this Extension :
Damage arising during the
application of hydraulic test of the plant and occasioned thereby.
Definitions :
THE TERM BOILER AND PRESSURE
VESSEL PLANT INCLUDES ANY CONNECTED SUPER HEATERS, ECONOMISERS, MOUNTINGS,
FITTINGS, VALVES AND STEAM PIPING.
Specific Exclusions to this Extension :
If at the time of explosion or
collapse or other damage insured by this extension :
the load on the safety valve or
safety valves upon the particular item of plant was in excess of that permitted
by the latest certificate issued in accordance with Boiler Inspection
Regulations applicable thereto; or,
if any safety valve limiting the
pressure is removed or rendered inoperative; or,
where certificates of inspection
are issued by a Government Department if the particular item of plant was not
so certified –
the the Insured shall not be
entitled to any indemnity under this Extension.