Section
1 General requirements
1.1 General
1.1.2 Control engineering systems are to:
- provide control of required services and habitability
requirements during defined operational conditions;
- provide control of the engineering systems necessary to ensure
availability of essential and emergency safety systems during all normal and
reasonably foreseeable abnormal conditions;
- provide control of the engineering systems necessary to ensure
transitional power supplies remain available;
- be suitably protected against damage to itself under fault
conditions and to prevent injury to personnel; and
- not fail in a way which may cause machinery and systems located
in hazardous areas to create additional fire or explosion risk.
1.1.3 These requirements apply to manned offshore units. Special consideration
will be given to unmanned offshore units which are controlled from the shore or from
another offshore installation.
1.1.4 Where reference is made in this Chapter to the requirements of the Rules
for Ships, references therein to ‘ship(s)’ are to be understood to apply to
‘unit(s)’.
1.2 Documentation required for design
review
1.2.3 Documentation for the control, alarm and safety systems of the following
is to be submitted as applicable:
- Propulsion and positioning systems:
- Controllable pitch propellers.
- Dynamic positioning systems.
- Positional mooring and single point mooring
systems.
- Propelling machinery including essential
auxiliaries.
- Steering gear.
- Thruster-assisted positional mooring systems.
- Thruster units.
- Utilities and services:
- Air compressors.
- Bilge and ballast systems.
- Diving systems including compression chambers.
- Electric generating plant.
- Fixed water based local application fire-fighting
systems.
- Evaporating and distilling systems.
- General service plant air and control and instrument air
systems.
- Heating Ventilation and Air Conditioning (HVAC) systems
including arrangements provided in respect of Pt 6, Ch 1, 1.3 Control, alarm and safety equipment 1.3.3.
- Incinerators.
- Inert gas generators.
- Main propelling machinery including essential
auxiliaries.
- Lifting appliances.
- Mechanical refrigeration systems.
- Fuel oil transfer and storage (purifiers and oil
heaters).
- Oily water separators.
- Steam raising plant (boilers and their ancillary
equipment).
- Cargo and ballast pumps in hazardous areas.
- Tempered water systems.
- Waste heat boiler.
- Windlasses.
- Valve position indicating systems, see
Pt 6, Ch 1, 2.7 Valve control systems.
- Miscellaneous machinery or equipment (where control,
alarm and safety systems are specified by other Sections of the
Rules).
- Cargo tank, storage tank, ballast tank and void space
instrumentation where specified by other Sections of the Rules (e.g.
water ingress detection, gas detection).
- Thermal fluid heaters.
- Process plant equipment:
- Coalescers, skimmers and dehydrators.
- Export pumps and compressors.
- Gas compressors.
- Gas lift systems.
- Glycol contactors and regenerators.
- Heat exchangers.
- HP and LP flare systems.
- Process analysers.
- Production and test separator vessels.
- Production transfer and storage systems.
- Sand detection systems.
- Scrubbers.
- Sphere launching and receiving systems.
- Surge, flash and knock out drums.
- Water, gas and chemical injection systems.
- Well head, choke and header systems.
- Wireline systems.
- Drilling plant equipment:
- Blow out preventer stacks and diverter systems.
- Cement and barytes storage and handling systems.
- Choke and kill systems.
- Drawworks and eddy current brakes.
- Mud logging systems.
- Mud and cement pumps.
- Mud treatment systems.
- Rotary table.
- Wireline systems.
- Pipe-laying systems
- Riser systems.
1.2.4
System operational concept. A description of how the control, alarm and
safety systems for the main and auxiliary machinery and systems essential for the
propulsion and safety of the unit provide effective means for operation and control
during all unit operational conditions.
1.2.5
Alarm systems. Details of the overall alarm system, linking the main control
station, subsidiary control stations, workstation(s) for navigation and manoeuvring
and where applicable, the bridge area, the accommodation and other areas where duty
personnel may be present are to be submitted.
1.2.9
Approved system. Where it is intended to employ a standard system which has
been previously approved, documentation is not required to be submitted, providing
there have been no changes in the applicable Rule requirements. The building port,
where applicable, the specific project and date of the previous approval are to be
advised.
1.3 Control, alarm and safety
equipment
1.3.1 The requirements for control, alarm and safety equipment are given in
Pt 6, Ch 1, 1.4 Control, alarm and safety equipmentof the Rules for Ships, which are to be complied
with. Additions or amendments to these requirements are given in the following
paragraph(s) of this sub-Section.
1.4 Alterations and additions
1.4.1 The requirements for alterations and additions are given in Pt 6, Ch 1, 1.5 Alterations and additionsof the Rules for Ships, which are to be complied
with. Additions or amendments to these requirements are given in the following
paragraph(s) of this sub-Section.
1.4.2 For ESD systems, see
Pt 7, Ch 1, 1 General requirements, software modifications are to be
undertaken in accordance with IEC 61508-1:2010, Functional safety of
electrical/electronic/ programmable electronic safety-related systems – Part 1:
General requirements, Section 7.16, or alternative relevant International or
National Standard.
1.5 Definitions
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