11.1 Foam may only be installed as flotation material
on a vessel when approved by the Administration.
11.2 Where foam is installed as flotation material
on a vessel, the owner shall ensure that the following tests are conducted
and requirements are met to the satisfaction of the Administration:
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.1 foam shall not be installed in void spaces
that contain ignition sources;
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.2 foam shall not be installed adjacent to fuel
tanks, unless the boundary between the tank and the space has double
continuous fillet welds;
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.3 the structure enclosing foam shall be strong
enough to accommodate the buoyancy of the foam;
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.4 piping and cables shall not pass through foamed
spaces unless they are within piping and cableways accessible from
both ends;
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.5 blocked foam shall:
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.1 be used in each area that may be exposed to
water; and
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.2 have a protective cover, approved by the administration,
to protect it from damage;
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.6 foam used as floatation material shall be:
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.1 impervious to water absorption;
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.2 structurally stable under service conditions;
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.3 chemically inert in relation to other medium
with which it may be in contact;
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.4 properly secured in place; and
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.5 easily removable for inspection of the void
space.
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.7 a water submergence test shall be conducted
on the foam for a period of at least 7 days to demonstrate to the
satisfaction of the Administration that the foam has adequate strength
to withstand a hydrostatic head equivalent to that which would be
imposed if the vessel were submerged to its bulkhead deck;
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.8 the owner or operator shall obtain sample foam
specimens during installation of the foam and determine the density
of the installed foam.