18.2.1 At
each Special Survey of the inert gas system, the inert gas generator,
scrubber and blower are to be opened out as considered necessary and
examined. Gas distribution lines and shut-off valves, including soot
blower interlocking devices are to be examined as considered necessary.
The deck seal and non-return valve are to be examined. Cooling water
systems including the effluent piping and overboard discharge from
the scrubbers are to be examined. All automatic shutdown devices and
alarms are to be tested. The complete installation is to be tested
under working conditions on completion of survey.
18.2.2 When,
at the request of an Owner, it has been agreed by the Committee that
the Complete Survey of the inert gas systems may be carried out on
the Continuous Survey basis, the various items of machinery are to
be opened for survey in rotation, so far as practicable, to ensure
that the interval between consecutive examinations of each item will
not exceed five years. In general, approximately one-fifth of the
machinery is to be examined each year.
18.2.3 If
any examination during Continuous Survey reveals defects, further
parts are to be opened up and examined as considered necessary by
the Surveyors, and the defects are to be made good to their satisfaction.