Section
10 Machinery surveys – General requirements
10.1 Annual Surveys
10.1.2 In ships
which are subject to Annual Surveys as set out in Pt 1, Ch 2, 3.5 Existing ships – Periodical Surveys 3.5.2 the Surveyor is to inspect
the machinery spaces generally, with particular attention being given
to the following:
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Propulsion system,
auxiliary machinery and to the existence of any fire and explosion
hazards.
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Emergency escape
routes are to be checked to ensure that they are free of obstruction.
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The bilge pumping
system, including operation of extended spindles and level alarms,
where fitted. Satisfactory operation of the bilge pumps is to be proven.
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Verification, so
far as is practicable, that the remote controls for stopping fans
and machinery and shutting off fuel oil supplies in machinery spaces
and, where fitted, the remote controls for stopping fans in accommodation
spaces and the means of cutting off power to the galley are in good
working order.
10.1.4 The main
propulsion, essential auxiliary and emergency generators including
safety arrangements, controls and foundations are to be generally
examined. Surveyors are to confirm that Periodical Surveys of engines
have been carried out as required by the Rules and that safety devices
have been tested.
10.1.5 For ships
fitted with automation equipment for main propulsion, essential auxiliary
and emergency machinery, a general examination of the equipment and
arrangements is to be carried out. Records of changes to the hardware
and software used for control and monitoring systems for propelling
and essential auxiliary machinery since the original issue (and their
identification) are to be reviewed by the attending Surveyor. Satisfactory
operation of the safety devices and control systems is to be verified.
10.1.6 For ships
fitted with an electronically controlled engine for main propulsion,
essential auxiliary and emergency power purposes, the following is
to be carried out to the satisfaction of the Surveyor:
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A general examination
of the electronic control system and associated parts.
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Verification of
evidence of satisfactory operation of the engine and where possible
this is to include a running test under load.
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Verification of
satisfactory operation of the safety devices and control systems.
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Verification that
any changes to hardware and software for control of the engine have
been submitted and approved by LR.
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Verification that
any changes to control and monitoring arrangements that affect the
operation of the engine have been submitted and approved by LR.
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Verification that
where changes have been carried out, there is evidence of acceptance
tests and trials for Programmable Electronic Systems which include
confirmation of software life cycle activities appropriate to the
stage in the system's life cycle at the time of system examination.
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Identification and
verification that the key monitoring parameters/sensors are in working
order.
10.2 Intermediate Surveys
10.2.1 In ships
which are placed in dry dock or on a slipway for this survey, the
propeller(s), sternbush(es), water inlets and outlets and gratings
are to be examined. The clearance in each sternbush or the efficiency
of each sterngland is to be ascertained.
10.2.2 The machinery installation is to be generally examined and tested under
full load working conditions.
10.2.4 For ships
fitted with a classed dynamic positioning system, the control system
and associated machinery items are to be generally examined under
working conditions.
10.3 Complete Survey of machinery
10.3.1 When
the ship is in dry dock or on a slipway, the propeller(s), sternbush(es),
water inlets and outlets and gratings are to be examined. The clearance
in each sternbush or the efficiency of each oil gland is to be ascertained.
10.3.2 All shafts
(except screwshafts and tube shafts for which special arrangements
are detailed in Pt 1, Ch 3, 15 Screwshafts, tube shafts and propellers), thrust
block(s) and all bearings are to be examined. The lower halves of
bearings need not be exposed if alignment and weardown can be established
and found to be within acceptable limits.
10.3.3 An examination is to be made of all reduction gears complete with all
wheels, pinions, shafts, bearings and gear teeth, thrust bearings and integral clutch
arrangements. Toothed parts and clutches may be checked through inspection doors.
Opening up may be required by the Surveyor in view of the visible condition of the
components.
10.3.4 The following
auxiliaries and components are to be examined under working conditions:
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Auxiliary engines,
auxiliary air compressors with their intercoolers, filters and/or
oil separators and safety devices, and all pumps and components used
for essential services.
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Steering machinery.
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Windlass(es) and associated driving equipment, where fitted. Opening
up may be required by the Surveyor depending upon the trial results or the visible
condition of the components.
10.3.5 The holding
down bolts and chocks of main and auxiliary engines, gearcases, thrust
blocks and intermediate shaft bearings are to be examined.
10.3.6 All air
receivers for essential services, together with their mountings, valves
and safety devices are to be cleaned internally and examined internally
and externally. If internal examination of the air receivers is not
practicable, they are to be tested hydraulically to 1,3 times the
working pressure.
10.3.7 The valves,
cocks and strainers of the bilge system are to be opened up as considered
necessary by the Surveyor and, together with pipes, are to be examined
and tested under working conditions. The fuel oil, feed, lubricating
oil and cooling water systems, also the ballast connections and blanking
arrangements to deep tanks which may carry liquid or dry cargoes,
together with all pressure filters, heaters and coolers used for essential
services, are to be opened up and examined or tested, as considered
necessary by the Surveyor. All safety devices for the foregoing items
are to be examined.
10.3.8 Fuel
tanks which do not form part of the ship’s structure are to
be examined and if it is considered necessary by the Surveyor, they
are to be tested to the pressure specified for new tanks. The tanks
need not be examined internally before the ship is 15 years old if
they are found satisfactory on external inspection. The mountings,
fittings and remote controls of all fuel tanks are to be examined,
so far as practicable.
10.3.9 Where
remote and/or automatic controls are fitted for essential machinery,
they are to be tested to demonstrate that they are in good working
order.
10.3.10 Detailed requirements for engines, electrical installations and boilers are
given in Pt 1, Ch 3, 11 Engines – Detailed requirements, Pt 1, Ch 3, 12 Electrical equipment and Pt 1, Ch 3, 13 Boilers, respectively. In certain instances, upon application by the Owner
or where indicated by the maker’s servicing recommendations, the Surveyor will give
consideration to the circumstances where deviation from these detailed requirements is
warranted, taking into account design, appropriate indicating equipment and operational
records.
10.3.11 For
tankers the cargo vapour detection and alarm systems are to be examined,
calibrated and tested to demonstrate that they are in good working
order. Upper deck cargo loading and discharge pipe lines are to be
subjected to a pressure test of 1,1 times the approved maximum working
pressure with a minimum of 10 Bar.
10.3.12 For
ships that are provided with wheelhouse elevation arrangements, these
arrangements are to be examined and tested to the extent as considered
necessary by the Surveyor.
10.3.13 On
vessels fitted with a classed dynamic positioning system, the control
system and associated machinery items are to be examined and tested
under working conditions.
10.3.14 Where Thrusters and/or Podded Propulsors are fitted and have been assigned the ShipRight
descriptive note ThCM, the degree of inspection required whilst in dock will be
determined by the analysis of Condition Monitoring records. Refer to ShipRight
Procedure Machinery Planned Maintenance and Condition Monitoring, Section
8.
Note Not applicable where a single thruster, or podded propulsor, is solely
responsible for the propulsion and/or steering of the vessel.
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