NORSOK STANDARD R-002 - Heavyliftspecialist

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NORSOK STANDARDR-002Edition 2, September 2012Lifting equipmentThis NORSOK standard is developed with broad petroleum industry participation by interested parties in theNorwegian petroleum industry and is owned by the Norwegian petroleum industry represented by The NorwegianOil Industry Association (OLF) and The Federation of Norwegian Industry. Please note that whilst every effort hasbeen made to ensure the accuracy of this NORSOK standard, neither OLF nor The Federation of NorwegianIndustry or any of their members will assume liability for any use thereof. Standards Norway is responsible for theadministration and publication of this NORSOK standard.Standards NorwayStrandveien 18, P.O. Box 242N-1326 LysakerNORWAYCopyrights reservedTelephone: 47 67 83 86 00Fax: 47 67 83 86 01Email: petroleum@standard.noWebsite: www.standard.no/petroleum

Foreword3Introduction31Scope42Normative and informative references2.1Normative references2.2Informative references4483Terms, definitions and abbreviations3.1Terms and definitions3.2Abbreviations88134General safety requirements4.1Safety4.2Fitness for use4.3Reliability and availability4.4Principle of safety integration4.5Inherently safe design measures4.6Safeguarding and complementary protective measures4.7Information for use4.8Strength proportion4.9Maintenance4.10 Quality management system4.11 Risk assessment4.12 Risk reduction4.13 Documentation of risk assessment4.14 Verification4.15 Qualification of new technology131313141414141414151515171718185Common requirements5.1Suitability5.2Materials and products5.3Fire and explosion5.4Ergonomics5.5Environmental conditions5.6Operational loads5.7Strength and stability – structure and mechanisms5.8Strength and stability – classification5.9High risk applications5.10 Power systems5.11 Electrotechnical equipment5.12 Non-electrotechnical equipment5.13 Controls, control stations and control systems5.14 Limiting and indicating devices5.15 Emergency systems5.16 Communication5.17 Pneumatics5.18 Hydraulics5.19 Electromagnetic compatibility (EMC)5.20 Exhaust and noise emissions5.21 Utility systems5.22 Fabrication5.23 Installation and assembly5.24 Corrosion protection5.25 Technical construction 282829Annex A (Normative) Launching and recovery appliances for life saving equipment31Annex B (Normative) Material handling principles80Annex C (Normative) Lifting accessories and lifting components – Group (G11)87Annex D (Normative) Lifting equipment in drilling areaNORSOK standard111Page 1 of 182

Annex E (Normative) Lifts122Annex F (Normative) Portable units125Annex G (Normative) Cranes141Annex H (Normative) Foundations and suspensions155Annex I (Informative) Selection of elastic pennant – calculation example165Annex J (Informative) Lifting lugs and mating shackles169Annex K (Informative) High risk application178NORSOK standardPage 2 of 182

ForewordThe NORSOK standards are developed by the Norwegian petroleum industry to ensure adequate safety,value adding and cost effectiveness for petroleum industry developments and operations. Furthermore,NORSOK standards are, as far as possible, intended to replace oil company specifications and serve asreferences in the authorities’ regulations.The NORSOK standards are normally based on recognised international standards, adding the provisionsdeemed necessary to fill the broad needs of the Norwegian petroleum industry. Where relevant, NORSOKstandards will be used to provide the Norwegian industry input to the international standardisation process.Subject to development and publication of international standards, the relevant NORSOK standard will bewithdrawn.The NORSOK standards are developed according to the consensus principle generally applicable for moststandards work and according to established procedures defined in NORSOK A-001.The NORSOK standards are prepared and published with support by The Norwegian Oil Industry Association(OLF), The Federation of Norwegian Industry, Norwegian Shipowners’ Association and The Petroleum SafetyAuthority Norway.Annexes A, B, C, D, E, F, G and H are normative. Annexes I, J, and K are informative.NORSOK standards are administered and published by Standards Norway.IntroductionThe main purpose of this NORSOK standard is to contribute to an acceptable level of safety for humans, theenvironment and material assets in the petroleum industry by giving technical requirements for liftingequipment.During development of this NORSOK standard, due consideration has been given to relevant EU Directives,Norwegian regulations, European Standard and International standard, as well as other formal documents ofrelevance. It should be noted, however, that this NORSOK standard is not a harmonised standard, and itdoes not contain all the technical and administrative requirements of the applicable regulations anddirectives, see the foreword.The expert group responsible for this NORSOK standard has agreed that the main safety philosophy andprincipal requirements of the standard shall be based on applicable safety and health requirements stated inrelevant EU directives, e.g. the Machinery directive (2006/42/EC), ATEX directive (94/9/EC), LVD(2006/95/EC), EMC directive (2004/108/EC), PED (97/23/EC). This applies regardless of type of installationor unit on which lifting equipment is installed. Administrative requirements, however, (e.g. CE marking,declaration of conformity, requirements for EC Type-examination, etc.) do not form part of this NORSOKstandard.The requirements of this NORSOK standard are given in clause 4, clause 5 and in the annexes. Thecombination of all these requirements forms the technical basis the lifting equipment has to comply with. Incase of conflict between similar, but not identical requirements, the requirements of the annexes prevail overthe common requirements of clause 5, which in turn prevails over the safety requirements of clause 4.However, this general rule may only be waived if the manufacturer makes use of a recognised solution anddocuments by means of a risk assessment that said solution gives an equal or better safety level than theconflicting requirement.NORSOK standardPage 3 of 182

1ScopeThis NORSOK standard is valid for technical requirements to lifting appliances and lifting accessories on allfixed and floating installations, mobile offshore units, barges and vessels, as well as on land based plantswhere petroleum activities are performed. This standard is also valid for material handling and the followingequipment: Launching and recovery appliances for life saving equipment, with and without lifting function; Means of connection and release systems that are integrated parts of life saving equipment, as well astheir anchorage in the life saving equipment; Portable units; Foundations and suspensions for lifting appliances; Lifts.NOTE 1NOTE 22For the safe use of lifting equipment, reference is made to NORSOK R-003 and NORSOK R-005.The application of this standard is regulated by references in guidance to PSA Regulations or the responsiblecompany’s internal requirementsNormative and informative referencesThe following standards include provisions and guidelines which, through reference in this text, constituteprovisions and guidelines of this NORSOK standard. Latest issue of the references shall be used unlessotherwise agreed. Other recognized standards may be used provided it can be shown that they meet therequirements of the referenced standards.NOTE Some clauses in this standard refer to specific clauses in the normative references. These references are based upon theeditions available at the time of issuing this standard.2.1Normative referencesCEN/TS 13001-3-2,CEN/TS 13001-3-5,Directive 97/68/EC,DNV Standard for CertificationNo. 2.22,DNV-OS-E101,DNV OS-E406,DNV-OS-H101EN 349,EN 614-1,EN 614-2,EN 818-1,EN 818-2,EN 818-4,NORSOK standardCranes – General design – Part 3-2: Limit states and proof ofcompetence of wire ropes in reeving systemsCranes - General design – Part 3-5: Limit states and proof ofcompetence of forged hooksDirective of the European Parliament and of the Council of 16 Decmber1997 on the approximation of the laws of the Member States relating tomeasures against the emission of gaseous and particulate pollutants frominternal combustion engines to be installed in non-road mobile machinery,amended by Directives 2001/63/EC, 2002/88/EC, 2004/26/EC and2006/105/ECLifting AppliancesDrilling PlantDesign of free fall lifeboatsMarine Operations, GeneralSafety of machinery – Minimum gaps to avoid crushing of parts of thehuman bodySafety of machinery – Ergonomic design principles – Part 1: Terminologyand general principlesSafety of machinery – Ergonomic design principles – Part 2: Interactionsbetween the design of machinery and work tasksShort link chain for lifting purposes - Safety - Part 1: General conditions ofacceptanceShort link chain for lifting purposes – Safety – Part 2: Medium tolerancechain for chain slings – Grade 8Short link chain for lifting purposes - Safety - Part 4: Chain slings - Grade8Page 4 of 182

EN 818-6,EN 842,EN 894-1,EN 894-2,EN 894-3,EN 953,EN ISO 4413,EN ISO 4414,EN 1037,EN 1127-1,EN 1492-1,EN 1492-2,EN 1492-4,EN 1677-1,EN 1677-2,EN 1677-3EN 1677-4,EN 1679-1,EN 1834-1,EN 1993-1,EN 1999-1-1,EN 12077-2,EN 12198-2,EN 12385-1,EN 12385-2,EN 12385-3,EN 12385-4,EN 12644-1,EN 12644-2,EN 13001-1,EN 13001-2,EN 13001-3-1,NORSOK standardShort link chain for lifting purposes - Safety - Part 6: Chain slings Specification for information for use and maintenance to be provided bythe manufacturerSafety of machinery – Visual danger signals – General requirements,design and testingSafety of machinery – Ergonomics requirements for the design of displaysand control actuators – Part 1: General principles for human interactionswith displays and control actuators .Safety of machinery – Ergonomics requirements for the design of displaysand control actuators – Part 2: DisplaysSafety of machinery – Ergonomics requirements for the design of displaysand control actuators – Part 3: Control actuatorsSafety of machinery – Guards – General requirements for the designand construction of fixed and movable guardsHydraulic fluid power - General rules and safety requirements for systemsand their components (ISO 4413:2010)Pneumatic fluid power - General rules and safety requirements forsystems and their components (ISO 4414:2010)Safety of machinery – Prevention of unexpected start-upExplosive atmospheres – Explosion prevention and protection – Part 1:Basic concepts and methodologyTextile slings – Safety – Flat woven webbing slings made of man-madefibres for general purpose useTextile slings – Safety – Roundslings made of man-made fibres forgeneral purpose useTextile slings – Safety – Lifting slings for general service made fromnatural and man-made fibre ropesComponents for slings – Safety – Part 1: Forged steel components,Grade 8Components for slings – Safety – Part 2: Forged steel lifting hooks withlatch, Grade 8Components for slings - Safety - Part 3: Forged steel self-locking hooks Grade 8Components for slings – Safety – Part 4: Links, Grade 8Reciprocating internal combustion engines – Safety – Part 1:Compression ignition enginesReciprocating internal combustion engines – Safety requirements fordesign and construction of engines for use in potentially explosiveatmospheres – Part 1: Group II engines for use in flammable gas andvapour atmospheresEurocode 3: Design of steel structures - Part 1-1: General rules and rulesfor buildingsEurocode 9: Design of aluminium structures - Part 1-1: General structuralrulesCranes safety – Requirements for health and safety – Part 2: Limiting andindicating devicesSafety of machinery - Assessment and reduction of risks arising fromradiation emitted by machinery – Part 2: Radiation emissionmeasurement procedureSteel wire ropes – Safety – Part 1: General requirementsSteel wire ropes – Safety – Part 2: Definitions, designation andclassificationSteel wire ropes – Safety – Part 3: Information for use and maintenanceSteel wire ropes – Safety – Part 4: Stranded ropes for general liftingapplicationsCranes – Information for use and testing – Part 1: InstructionsCranes – Information for use and testing – Part 2: MarkingCranes – General design – Part 1: General principles and requirementsCranes – General design – Part 2: Load actionsCranes – General design – Part 3-1: Limit states and proof ofcompetence of steel structuresPage 5 of 182

1prEN 13001-3-3 ,Cranes – General design – Part 3-3: Limit states and proof ofcompetence of wheel/rail contactsEN 13135-1,EN 13135-2,EN 13155,EN 13157,EN 13411-1,Cranes – Equipment – Part 1: Electrotechnical equipmentCranes – Equipment – Part 2: Non-electrotechnical equipmentCranes – Safety – Non-fixed load lifting attachmentsCranes - Safety - Hand powered cranesTerminations for steel wire ropes - Safety - Part 1: Thimbles for steel wirerope slingsTerminations for steel wire ropes – Safety – Part 3: Ferrules and ferrulesecuringTerminations for steel wire ropes – Safety – Part 4: Metal and resinsocketingTerminations for steel wire ropes – Safety – Part 6: Asymemtric wedgesocketTerminations for steel wire ropes – Safety – Part 7: Symmetric wedgesocketSteel wire rope slings – Safety – Part 1: Slings for general lifting serviceSteel wire rope slings - Safety - Part 2: Specification for information foruse and maintenance to be provided by the manufacturerSteel wire rope slings - Safety - Part 3: Grommets and cable-laid slingsNon-electrical equipment for use in potentially explosive atmospheresSafety of machinery - Fire prevention and protectionCranes – Controls and control stationsCranes – AccessCranes – Offshore cranes – Part 1: General purpose offshore cranesCranes – Offshore cranes – Part 2: Floating cranesForged steel shackles for general lifting purposes. Dee shackles and bowshackles. Grade 6. Safety.Cranes – Power driven winches and hoists – Part 1: Power drivenwinchesCranes – Power driven winches and hoists – Part 2: Power driven hoistsCranes - Equipment for the lifting of persons - Part 1: Suspended basketsCranes – bridge and gantry cranesRules for the design of hoisting appliancesRotating electrical machinesExplosive atmospheres (all parts)Safety of machinery – Electrical equipment of machines – Part 1: GeneralrequirementsSafety of machinery – Electrical equipment of machines – Part 32:Requirements for hoisting machinesDependability management – Part 3-11: Application guide – Reliabilitycentred maintenanceDegrees of protection provided by enclosures (IP Code)Analysis techniques for system reliability – Procedure for failure mode andeffects analysis (FMEA)Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –Immunity for industrial environmentsElectromagnetic compatibility (EMC) – Part 6-4: Generic standards Emission standard for industrial environmentsMobile and fixed offshore units – Electrical installations – (all parts)International Maritime Dangerous Goods CodeSymbols related to Life Saving Appliances and ArrangementsAmendments to Resolution A.760 (18)Fibre ropes -- Determination of certain physical and mechanicalpropertiesMechanical vibration and shock – Evaluation of human exposure towhole-body vibration – Part 1: General requirementsGraphical symbols – Safety colours and safety signs – Part 1: Designprinciples for safety signs and safety markingsEN 13411-3,EN 13411-4,EN 13411-6,EN 13411-7,EN 13414-1,EN 13414-2,EN 13414-3,EN 13463,EN 13478,EN 13557,EN 13586,EN 13852-1,EN 13852-2,EN 13889,EN 14492-1,EN 14492-2,EN 14502-1,EN 15011,rdFEM 1.001, 3 edition 1998,IEC 60034,IEC 60079 (all parts),IEC 60204-1,IEC 60204-32,IEC 60300-3-11,IEC 60529,IEC 60812,IEC 61000-6-2,IEC 61000-6-4,IEC 61892 (all parts),IMDG Code,IMO Resolution A.760 (18),IMO Resolution MSC.82 (70),ISO 2307,ISO 2631-1,ISO 3864-1,1To be published.NORSOK standardPage 6 of 182

ISO 3864-2,ISO 3864-3,ISO 6385,ISO 7010,ISO 9001,ISO 10423,ISO/TR 11688-1,ISO/TR 11688-2,ISO 11961,ISO 12100,ISO 12482-1,ISO 12944-1,ISO 13200,ISO 13535,ISO 13628-1,ISO 13628-4,ISO 13628-7,ISO 13702,ISO 13849-1,ISO 13850,ISO 13857,ISO/TR 14121-2,ISO 16467,ISO 17894,ISO 19901-6,ISO 21898,LSA Code,NMD Regulation 4.July 2007No.853,NORSOK E-001,NORSOK M-501,NORSOK N-004,NOKSOK R-003,NORSOK R-005,NORSOK S-001,NORSOK S-002,NORSOK Z-007,NORSOK Z-008,NORSOK standardGraphical symbols – Safety colours and safety signs – Part 2: Designprinciples for product safety labelsGraphical symbols – Safety colours and safety signs – Part 3: Designprinciples for graphical symbols for use in safety signsErgonomic principles in the design of work systemsGraphical symbols -- Safety colours and safety signs -- Registered safetysignsQuality management systems – RequirementsPetroleum and natural gas industries -- Drilling and production equipment-- Wellhead and christmas tree equipmentAcoustics – Recommended practice for the design of low-noisemachinery and equipment – Part 1: PlanningAcoustics – Recommended practice for the design of low-noisemachinery and equipment – Part 2: Introduction to the physics of lownoise designPetroleum and natural gas industries - Steel drill pipeSafety of machinery – General principles for design – Risk assessmentand risk reductionCranes – Condition monitoring – Part 1: GeneralPaints and varnishes – Corrosion protection of steel structures byprotective paint systems – Part 1: General introductionCranes – Safety signs and hazard pictorials – General principlesPetroleum and natural gas industries - Drilling and production equipment Hoisting equipmentPetroleum and natural gas industries - Design and operation of subseaproduction systems - Part 1: General requirements and recommendationsPetroleum and natural gas industries -- Design and operation of subseaproduction systems -- Part 4: Subsea wellhead and tree equipmentPetroleum and natural gas industries - Design and operation of subseaproduction systems - Part 7: Completion/workover riser systemsPetroleum and natural gas industries – Control and mitigation of fires andexplosions on offshore production installations – Requirements andguidelinesSafety of machinery – Safety-related parts of control systems – Part 1:General principles for designSafety of machinery – Emergency stop – Principles for designSafety of machinery – Safety distances to prevent hazard zones beingreached by upper and lower limbsSafety of machinery – Risk assessment – Part 2: Practical guidance andexamples of methodsPackaging -- Transport packages for dangerous goods -- Test methodsfor IBCsShips and marine technology -- Computer applications -- Generalprinciples for the development and use of programmable electronicsystems in marine applicationsPetroleum and natural gas industries -- Specific requirements for offshorestructures -- Part 6: Marine operationsPackaging -- Flexible intermediate bulk containers (FIBCs) for nondangerous goodsIMO SOLAS Life saving appliances (LSA) Code, adopted by the MaritimeSafety Committee by resolution MSC.48(66),(concerning evacuation and life-saving appliances on mobile offshoreunits)Electrical systemsSurface preparation and protective coatingDesign of steel structuresSafe use of lifting equipmentSafe use of lifting and transport equipment in onshore petroleum plantsTechnical safetyWorking environmentMechanical completion and commissioningRisk based maintenance and consequence classificatiionPage 7 of 182

US Federal Specification FF-T-791.B, TurnbuckleUS Federal Specification RR-C-271, Chain and attachments, welded and weldless2.2Informative referencesDNV-OS-C501,DNV OSS-308,DNV-RP-A203,DNV-RP-C203,EN 1993-6,NORSOK N-001,3DNV Offshore Standard Composite ComponentsVerification of lifting appliances for the oil and gas industryQualification of New TechnologyFatigue Design of Offshore StructuresEurocode 3: Design of steel structures - Part 6: Crane supporting structuresIntegrity of offshore structuresTerms, definitions and abbreviationsFor the purposes of this NORSOK standard, the following terms, definitions and abbreviations apply.3.1Terms and definitions3.1.1activation systeminterconnected parts necessary for powered or manual opening of the release mechanism, including thepower supply and control system or manual control device3.1.2agreedterm used when operating conditions or other design parameters are to be specified, and an agreement hasto be reachedNOTE The parties of the agreement are the manufacturer of the equipment in question, and the company’s technical responsible foroperation of the installation in question. The term is used in different contexts, e.g. “unless otherwise agreed”, “to be agreed”, “asagreed” etc.3.1.3availabilityavailability of an item to be in a state to perform a required function under given conditions at a given instantof time, or in average over a given time interval, assuming that the required external resources are provided3.1.4breaking load (breaking force)the maximum load reaced during a static tensile test to destruction of a lifting component or liftingaccessories. Destruction is understood as actual breakage or failiure to sustain a load due partsdisconnecting as result of deformation.NOTE:In this standard both therms “breaking load” and “breaking force” are used, having the same meaning3.1.5breaking load testa static tensile test with the purpose of determining the actual breaking load (breakding force) of a liftingcomponent or lifting accessories in order to verify a specified minimum value3.1.6canverbal form used for statements of possibility and capability, whether material, physical or casual3.1.7complex lifting appliancespower driven lifting appliances with high capacity and or high risksNOTE Complex lifting appliances include, but are not limited to: offshore cranes, BOP cranes, drawworks, launching appliances forlifeboats, tower cranes, mobile cranes etc.NORSOK standardPage 8 of 182

3.1.8cranelifting appliance whereby the load can be moved horizontally in one or more directions, in addition to thevertical movement3.1.9design temperaturedesign temperature is a reference temperature used as a criterion for the selection of materials. The designtemperature is the lowest mean daily temperature, which is the lowest point on the mean daily temperaturecurve over the year for a specific area. The mean daily temperature is the statistical 24 hour meantemperature for a specific calendar day, based on and averaged over a number of years of observation.3.1.10extended harmdamage to material assets or the environment in addition to harm (physical injury or damage to health)3.1.11fail-safe componentcomponent where the predominant failure mode is known in advance, and which is used such that the effectof such failure is less critical3.1.12harmphysical injury or damage to health3.1.13inherently safe design measureprotective measure which either eliminates hazards or reduces the risks associated with hazards by changingthe design or operating characteristics of the machine without the use of guards or protective devices3.1.14installationfacility, plant or vessel involved in petroleum activities (excluding ships that transport petroleum in bulk)NOTE Reference is made to PSA regulations for definition of petroleum activities.Examples of installations include fixed installations, FPSO vessels, rigs, barges, crane barges, service vessels, onshore plants etc.3.1.15launching and recovery applianceslifting appliance for lifesaving equipment3.1.16lay down areadeck area for temporary storage of loads and equipment3.1.17lifesaving equipmentevacuation equipment and rescue equipment3.1.18lifting accessoriescomponents or equipment used between the lifting appliance and the load or on the load to grip it, but whichis not an integrated part of the lifting applianceNOTE The term “lifting accessories” equals “lifting gear” as defined by ILO Convention 167 and NORSOK R-003/R-005 and “loosegear” as defined by ILO Convention 152.3.1.19lifting appliancemachine or device used for vertical movement of a load, with or without horizontal movementNORSOK standardPage 9 of 182

NOTE Include cranes, hoists, drilling hoisting equipment and launching and recovery appliances for life saving equipment, etc.3.1.20lifting componentscomponents used as integral parts of lifting appliances and/or as part of lifting accessories.NOTE:In some cases, lifting components may be lifting accessories on their own.3.1.21lifting equipmentcommon term for all equipment covered by the scope of this standard3.1.22lifting operationall administrative and operational activities before, during and after a load is moved and until the liftingequipment is ready for a new load3.1.23lifting setterm used for single legged or multi legged slings3.1.24lifting zonespace between the working area and the maximum lifting height3.1.25LSA codethe IMO SOLAS Life saving appliances (LSA) Code, 2003 Edition, adopted by the Maritime Safety Committee(MSC) by resolution MSC.48(66) including the Revised recommendation on testing of life-saving appliances(resolution MSC.81(70)).3.1.26main lay down areadeck area for temporary storage of loads and equipment during normal logistics operation of the installation3.1.27material handlingvertical and horizontal movement of a loadNOTE Material handling principles include all activities related to handling of goods and materials to and from and internally on theinstallation in all phases of its lifetime3.1.28mayverbal form used to indicate a course of action permissible within the limits of this NORSOK standard3.1.29means of connectionmechanical parts (e.g. hooks, links, rings, etc.) intended for connection of the life saving equipment to thelaunching and recovery applianceNOTE The term “means of connection” covers both those parts which are integral to the life saving equipment and those parts whichare integral to the lifting appliance.3.1.30offboard liftlifting operation between the offshore installation and a floating unit or the seaNORSOK standardPage 10 of 182

3.1.31offlead angleangle from the vertical at which the hoist rope or chain leaves the lifting appliance, measured in the planedescribed by the vertical and the radial direction of the last sheave or drum, whichever is the last contactpoint with the structure of the lifting applilance. Offlead angle is caused by the radial displacement of thehook/load3.1.32offshore cranecrane performing offboard lifting operations3.1.33onboard liftlifting operation within the offshore installation3.1.34operating temperature limitsthe operating temperature limits are the minimum and maximum environmental temperatures for normaloperation of the lifting equipment, where all effects of high and low temperatures have been taken intoaccount3.1.35personnel transfer carrierbasket suspended on cranes used for transfer of personnel between installations and ships3.1.55proof load (proof force)specified load (force) to which a lifting component or lifting accessories are to be subjected during proof loadtestNOTE:In this standard both therms “proof load” and “proof force” are used, having the same meaning3.1.36proof load test (proof force test)a static tensile test with a specified proof load (proof force) to which lifting components or lifting accessoriesare subjected during or after manufacturing. After the test, the tested object shall meet a specifiedacceptance criterion with respect to deformation.3.1.37rated capacity (R)maximum load that a lifting appliance is designed to lift under specific conditionsNOTE Rated capacity which corresponds to SWL used by International Labour Organisation (ILO).3.1.38redundant componentcomponent or components which continue to perform a failed component's purpose or function withoutaffecting the safe operation3.1.39release mechanismparts of the means of connection that are moveable for the purpose of disconnecting the life savingequipment from its launching and recovery appliance3.1.40release systemcombination of release mechanism and activation system3.1.41reliabilityNORSOK standardPage 11 of 182

ability of an item to perform a required function under given conditions for a given time interval3.1.42reliable componentcomponent which is capable of withstanding all load conditions, disturbances and stresses, with a lowprobability of failures or malfunctions3.1.43rescue boatboat designed to rescue persons in distress and to marshal survival craft.NOTE Rescue boats are also commonly known as man over board (MOB) boats.3.1.44rescue equipmentrescue boats and personnel transfer carrier3.1.45riskcombination of the probability of occurrence of harm and the severity of that harm3.1.46safe working loadSWLmaximum working load that the lifting equipment is designed to lift under specific conditionsNOTE Safe working load corresponds to the term rated capacity (R) used by many standards.3.1.47shallverbal form used to indicate requirements strictly to be followed in order to conform to this NORSOK standardand from which no deviation is permitted, unless accepted by all involved parties3.1.48shouldverbal form used to indicate that among several possibilities one is recommended as particularly suitable,without mentioning or excluding others, or that a certain course of action is preferred but not necessarilyrequiredNOTE The term ’should’ means that other solutions can be chosen than the one recommended in the standard. It shall be documentedthat the alternative solution provides an equivalent level of safety.3.1.49sidelead angleangle from the vertical at which the hoist rope or chain leaves the lifting appliance, measured in the planedescribed by the vertical and the transverse direction of the last sheave or drum, whichever is the last contactpoint with the structure of the lifting applilance. Sidelead angle is caused by the lateral displacement of thehook/load .3.1.50significant wave heightthe average wave height (measured from trough to crest) of the highest one-third

The NORSOK standards are developed according to the consensus principle generally applicable for most standards work and according to established procedures defined in NORSOK A-001. The NORSOK standards are prepared and published with support by The Norwegian Oil Industry Association

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