phase 4 report - DNV

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RN01: CO-ORDINATION OF DELIVERABLES // APPENDIXBARENTS 2020 PROJECT PHASE IVNew Work Item Proposal forISO TC67 Arctic International Standards DevelopmentNWIP2cTITLE OF PROPOSALAmendment to“IEC60079 – Electrical equipment, Explosive atmospheres and IEC/ISO 80079 Non-electrical equipment -Explosive atmosphere.”SCOPE OF PROPOSALUpdate standards for arctic application in areas as exemplified as follows:• Validity for temperatures below -20 o . IEC TC31 MT to consider the operatingtemperature range -20ºC to -60 C o , in all relevant standards listed.• Component protection according to Part 5 and 18 of IEC 60079 which must beused inside other protections need to be fit for arctic temperatures like lightingfittings, electronic units, amplifiers, transmitters, fuses, control units.• Requirements for temperature during installation and maintenance• Lubrication of bearings, need for special grease for low temperatures• Charging of batteries is difficult at low temperatures (below -5 o C)• Fluorescent lightning will have reduced/no effect (not possible to switch on below – 25 o C)• Electric heat tracing provides more accurate temperature control.• The operating procedures of equipment shall be adjusted for operation in arctic and cold regionsenvironments, and the criticality of such equipment or systems shall be taken into consideration.• Intrinsically safe characteristics can change and this must be reflected by selecting barriers accordingly.PURPOSE AND JUSTIFICATIONThese serial of standards contain descriptions on how to produce and calculate explosion protectedequipment and systems with different methods of protection, selection of equipment, and installationrequirements for each protection type to avoid ignition. Both IEC60079 and IEC80079 need to be updatedfor application in cold regions and in the Barents Sea.RELEVANT DOCUMENTS TO BE CONSIDERED• ISO 19906• Barents 2020 phase 3 report284RUSSIAN–NORWEGIAN COOPERATION PROJECT
RN01: CO-ORDINATION OF DELIVERABLES // APPENDIXBarents 2020BARENTS 2020 PROJECT PHASE IVNew Work Item Proposal forISO TC67 Arctic International Standards DevelopmentNWIP2dTITLE OF PROPOSALAmendment of:“IEC 61892-7 – Mobile and fixed offshore units, electrical installations , Part 7 – Hazardous areas”SCOPE OF PROPOSALSee description under PURPOSEPURPOSE AND JUSTIFICATION• IEC 61892 forms a series of International Standards intended to enable safety in the design,selection, installation, maintenance and use of electrical equipment for the generation,storage, distribution and utilization of electrical energy for all purposes in offshore unitswhich are used for the purpose of exploration or exploitation of petroleum resources.• Part 7 contains provisions for hazardous areas classification and choice of electricalinstallation in hazardous areas in mobile and fixed offshore units.• Arctic condition require that the standard need to take in new requirements for selection ofmaterials to be described, cable and cable installation requirements, layout to get access toexposed equipment for maintenance purposes and heating methods of walls and structures.• Part 7 does not give any general requirements to ambient temperatures.• The standard need to take in additional requirements for arctic conditions to secure thatthe artificial ventilation will function even if the main system failure. The air intakes andcapacity of the HVAC system must not be affected by atmospheric or sea spray icing.• The HVAC system must also ensure that the concentration of explosion substances inatmosphere shall not increase due to sheltering of process or drilling areas.• On these areas it is recommended that the standard refer to ISO13207 and ISO 19906,to give consistent guidance. ISO 19906 requires that redundancy shall be provided foremergency power generation for all structures in cold regions (ISO19906). IEC61892 - Part7 must describe back up sources requirements to maintain the ventilation required for areaclassification or other means of protecting the plant if the system should fail. This can forexample be to require a higher level of explosion protection of operating equipment.RELEVANT DOCUMENTS TO BE CONSIDERED• ISO 19906• Barents 2020 phase 3 reportsReport no 2012-0690 285
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Barents 2020Report no 2012-0690 1
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Barents 2020Barents 2020Assessment
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Barents 20206. Contents of Risk Man
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Barents 20203. Hazard Identificatio
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Barents 2020CONCLUSIVE SUMMARYThe B
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2. Cooperation PartnersThe last Ste
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RN02: DESIGN OF FLOATING STRUCTURES
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RN03: RISK MANAGEMENT OF MAJOR HAZA
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RN05: WORKING ENVIRONMENT - BARENTS
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