35. (1) This section applies to Parts IV to VIII and subject to subsection (2) before a certificate is issued to a new unit the Inspector shall carry out a first inspection of the machinery and verify that
(1) suitable slip resisting gratings, handrails and ladders are fitted to allow access to machinery for operational and maintenance purposes.
(2) Design, construction, installation and inspection requirements in addition to those detailed in this Part shall be in accordance with the requirements of the Machinery Inspection Regulations, the Machinery Construction Regulations, Marine Automation Standards TP2069 and Ship Safety Electrical Standards TP-127.
(3) Subject to subsection (4) main machinery and auxiliary machinery essential for the operation and safety of the unit shall be designed to function at full rated power when it is upright and when inclined at any angle of list up to and including
(4) The Board may permit deviation from the angles required by subsection (3) taking into consideration the type, size and service conditions of the unit.
(5) Machinery, where applicable, shall be provided with automatic shut-off arrangements or alarms in the case of failures which could lead rapidly to complete breakdown, damage or explosion; the Board may permit provisions for overriding automatic shut-off devices.
(6) Means shall be provided whereby normal operation of vital systems can be sustained or restored even though one of the essential auxiliaries becomes inoperable. Internal Combustion Engines
36. (1) The location of internal combustion engines shall be to the satisfaction of the Board.
(2) No person shall operate an internal combustion engine on a drilling unit where the air intake is
(3) No person shall operate a diesel engine within 20 metres of the centre line of the rotary table unless
(4) Internal combustion engines of a cylinder diameter of 200 millimetres or a crankcase volume of 0.6 cubic metres and above shall be provided with crankcase explosion relief valves of an approved type with sufficient relief area; the relief valves shall be arranged or provided with means to ensure that discharge from them will not result in injury to personnel.
(5) Efficient spark-preventing equipment is to be fitted to the exhausts from all combustion engines and equipment; means are to be provided to give warning when the supply of water to water-cooled spark-preventing equipment fails and exhausts should be led clear of hazardous areas.
(6) Air intakes for combustion engines and equipment shall be arranged clear of hazardous areas.
(7) All enclosed machinery spaces containing combustion engines or equipment shall be provided with sufficient mechanical ventilation to prevent danger to personnel due to escape of products of combustion, fuel, gas or other harmful agents.
Steam Boilers and Boiler Feed Systems
37. (1) Every steam boiler and every unfired steam generator shall be provided with safety valves of adequate capacity as required by the Machinery Construction Regulations.
(2) Every oil fired boiler which is intended to operate without manual supervision shall have safety arrangements which shut off the fuel supply and give an alarm in the case of low water level, air supply failure or flame failure.
(3) Subject to subsection (4) every steam generating system which could be rendered dangerous by the failure of its feed water supply shall be provided with not less than two separate feed water systems from and including the feed pumps as required by the Machinery Construction Regulations.
(4) For those services not essential for the safety of the unit, only one feed water system is required if automatic shutdown of the steam generating system upon loss of the feed water is provided.
(5) Means shall be provided which will prevent overpressure in any part of the feed water system.
(6) Boilers shall be provided with means to supervise and control the quality of the feed water and means shall be provided to preclude the entry of oil or other contaminants which may adversely affect the boiler.
(7) Every boiler essential for the safety of the unit and which is designed to have a water level shall be provided with at least two means for indicating its water level, at least one of which shall be a direct reading gauge glass.
(8) Efficient spark-preventing equipment shall be fitted to the exhausts from all fired equipment.
(9) Air intakes for all fired equipment shall be arranged clear of hazardous areas.
Steam Pipe Systems
38. (1) Every steam pipe and every fitting connected thereto through which steam may pass shall be so designed, constructed and installed as to withstand the maximum working stresses to which it may be subjected.
(2) Efficient means shall be provided for draining every steam pipe where water hammer action might occur.
(3) Where a steam pipe or fitting may receive steam from any source at a.higher pressure than that for which it is designed a suitable reducing valve, relief valve and pressure gauge shall be fitted.
39. (1) Machinery essential for the safety of the unit shall be provided with effective means for its operation and control.
(2) Automatic starting, operational and control systems for machinery essential for the safety of the unit shall include provisions for manually overriding the automatic controls and failure of any part of the automatic and remote control systems shall not prevent the use of the manual override.
Air Pressure Systems
40. (1) Every pressurized system shall be provided with means to prevent excess pressure in any part of the system and where water jackets or casings of air compressors and coolers may be subjected to excess pressure due to leakage into them from air pressure parts, suitable pressure relief arrangements shall be provided.
(2) Starting air arrangements for internal combustion engines shall be adequately protected against the effects of backfiring and internal explosions in the starting air pipes.
(3) Starting air pipes from the air receivers to internal combustion engines shall be entirely separate from the compressor discharge pipe system.
(4) Provision shall be made to reduce to a minimum the entry of oil into the starting air pressure systems and to drain these systems.
Oil Fuel, Lubricating Oil and Other Flammable Oils
41. (1) Arrangements for the storage, distribution and utilization of oil fuel shall be such as to ensure the safety of the unit and persons on board and as follows:
(2) Arrangements for the storage, distribution and utilization of oil used in pressure lubrication systems shall be such as to ensure the safety of the unit and persons on board.
(3) Arrangements for the storage, distribution and utilization of other flammable oils employed under pressure in power transmission systems, control and activating systems and heat transfer systems shall be such as to ensure the safety of the unit and persons on board.
(4) In machinery spaces pipes, fittings and valves carrying flammable oils shall be of a material approved by the Board, having regard to the risk of fire. Bilge and Ballast Arrangements
42. All units shall be provided with an efficient bilge and ballast pumping and piping system in accordance with the requirements of the Machinery Construction Regulations except as modified by Sections 43 and 44.
43. All units except Column Stabilized units shall be provided with
44. (1) Column stabilized units shall be provided with
(2) Compartments not provided with a bilge suction may be drained to other spaces provided with bilge pumping capability.
(3) Compartments below deck containing essential equipment for operation and safety of the unit shall be capable of being pumped out by at least two bilge pumps.
(4) Void compartments not provided with bilge or drainage systems as required by paragraph 1(e) are to be considered in the units stability analysis.
(5) Chain lockers shall be provided with a bilge or drainage system.
(6) The cross sectional area of the bilge main is to be not less than the combined areas of the two largest. branch suctions, the internal diameter of branch suctions or drains from each compartment is to be not less than that determined from
where d = internet diameter of the branch suction to the neares 5 millimetres
A = wetted surface in square metres of
(7) The internal diameter of any bilge pipe is to be not less than 50 millimetres.
(8) Propulsion rooms and pump rooms in lower hulls which are normally unattended shall be provided with two independent systems of high bilge water level detection.
(9) Piping systems shall be designed to preclude direct communication between hazardous areas of different classification and between hazardous and non hazardous areas.
(10) Seawater inlets, discharges and bilge injection systems in normally unattended spaces below the assigned load line shall be provided with valves operable from an accessible position outside the space; spaces containing such valves may be provided with bilge alarms in lieu of remote operation if the valves are readily accessible.
(11) Subject to subsection (12) the ballast pumps and valves shall be arranged for
(12) Power operated sea inlet, discharge valves and ballast tank isolating valves shall fail safe closed upon loss of control power and remain closed until the designated operator reassumes control of the system when control power is re-established, except that in the case of isolating valves a separate secondary independent means of operation from the secondary ballast control station would be acceptable.
(13) Ballast control stations shall be provided with at least the following:
(14) The main ballast control station shall be situated in an accessible and protected position above the final damage waterline.
(15) The secondary ballast control station/s shall be situated in an accessible position, above and outside the extent of damage zone described in section 27.
Air and Overflow Pipes
45. (1) Air, overflow and sounding pipes shall be in accordance with the requirements of the Machinery Construction Regulations except as modified by this section.
(2) Air pipes and overflows shall be located so that they will not cause progressive flooding unless such flooding has been taken into account in the damage stability review.
(3) Air pipes and overflows which terminate above the final calculated damage waterline shall be fitted with closing appliances to the satisfaction of the Board.
(4) Air pipes to tanks which can be run up from the sea shall be led above the bulkhead deck or above the final calculated damage waterline and air pipes to oil fuel tanks, cofferdams and all tanks which can be pumped up shall be led to the open.
46. (1) Subject to subsection (2) all main structural tanks shall be provided with separate sounding pipes.
(2) Column stabilized units shall in addition be provided with an approved remote level indicating system which shall indicate the status of tanks at the main ballast control station.
47. In addition to the required permanently marked draught marks, column stabilized units shall be fitted with draught gauges in appropriate locations which will automatically indicate the draughts of the unit in the main ballast control station.
Jacking and Self-Elevating Systems
48. (1) The elevating system of a self-elevating unit shall be designed and constructed to ensure that during a power loss to the elevating system or breakdown in any of the elevating units the system will continue to operate or the unit will be held in place (i.e. fail safe).
(2) The elevating system shall be controlled from a central position.
(3) Monitoring of the elevating system shall be provided at the central control with visual and audible alarms to give warning when the system is not working within preset limits.
(4) Monitoring shall include at least the following:
(5) Effective communication between the central control and elevating units shall be provided.