4.1.1 The machinery and electrical requirements
contained in chapters 4 to 8 provide an acceptable degree of protection
for personnel from fire, electric shock or other physical injuries.
The requirements apply to both marine and industrial equipment.
4.1.2 Codes and standards of practice which have
been proven to be effective by actual application by the offshore
drilling industry which are not in conflict with this Code, and which
are acceptable to the Administration, may be applied in addition to
these requirements.
4.1.3 All machinery, electrical equipment, boilers
and other pressure vessels, associated piping systems, fittings and
wiring should be of a design and construction adequate for the service
for which they are intended and should be so installed and protected
as to reduce to a minimum any danger to persons on board, due regard
being paid to moving parts, hot surfaces and other hazards. The design
should have regard to materials used in construction, and to the marine
and industrial purposes for which the equipment is intended, the working
conditions and the environmental conditions to which it will be subjected.
Consideration should be given to the consequences of the failure of
systems and equipment essential to the safety of the unit.
4.1.4 All machinery, components and systems essential
to the safe operation of a unit should be designed to operate under
the following static conditions of inclination:
-
.1 when column-stabilized units are upright and
inclined to an angle up to 15° in any direction;
-
.2 when self-elevating units are upright and inclined
to an angle up to 10° in any direction;
-
.3 when surface units are upright and in level
trim and when inclined to an angle of list up to 15° either way
and simultaneously trimmed to an angle up to 5° by the bow or
stern.
The Administration may permit or require deviations from these
angles, taking into consideration the type, size and service conditions
of the unit.
4.1.5 Jacking mechanisms for self-elevating units
are in general to be arranged with redundancy so that a single failure
of any component does not cause an uncontrolled descent of the unit.