Norsok Standard Z 008 Maintenance-Books Pdf

NORSOK STANDARD Z 008 Maintenance
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NORSOK standard Z 008 Rev 2 Nov 2001, Foreword 2, Introduction 2. 2 Normative references 3, 3 Definitions and abbreviations 4. 3 1 Definitions 4, 3 2 Abbreviations 6, 4 Application of this NORSOK standard 7. 4 1 General 7, 4 2 Principles for risk evaluation and allocation of maintenance activities 7. 4 3 Safety critical functions 8, 4 4 Inspection of static process equipment 8.
5 Functional hierarchy and criticality analysis 9, 5 1 General 9. 5 2 Necessary preconditions 10, 5 3 System selection 11. 5 4 Main function MF definition 11, 5 5 Sub function definition 12. 6 Documentation of the end product 13, 7 Application of criticality analysis 14. 7 1 Maintenance program 14, 7 2 Spare parts evaluation 16.
7 3 Conceptual and design evaluation 17, 7 4 Prioritising work orders 18. Annex A informative Main function description and boundaries 19. Annex B informative Simplifying consequence assessment 23. Annex C informative Practical examples 25, Annex D informative Relations to other NORSOK standards 29. Bibliography 30, NORSOK standard Page 1 of 30, NORSOK standard Z 008 Rev 2 Nov 2001. The NORSOK standards are developed by the Norwegian petroleum industry to ensure adequate safety. value adding and cost effectiveness for existing and future petroleum industry developments. The NORSOK standards are prepared to complement available international standards and fill the broad. needs of the Norwegian petroleum industry Where relevant NORSOK standards 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 publication of international standards the relevant NORSOK standard will be withdrawn. These 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 preparation and publication of the NORSOK standards is supported by OLF The Norwegian Oil. Industry Association and TBL Federation of Norwegian Manufacturing Industries NORSOK standards are. administered and issued by NTS Norwegian Technology Centre. All annexes are informative, Introduction, The purpose of this NORSOK standard is to provide requirements and guidelines for establishing a basis for. preparation and optimisation of maintenance programs for new and in service facilities offshore and onshore. taking into account risks related to, Environment, Production loss.
Direct economical cost everything other than cost of production loss. The result of this NORSOK standard is applicable for different purposes such as. Design phase, Establishing initial maintenance manning requirements identify hidden failures on critical equipment and. selection of insurance spare parts, Preparation for operation. Development of initial maintenance programs for implementation into maintenance management. systems and selection of ordinary spare parts, Operational phase. Optimisation of existing maintenance programs and as a guide for prioritising work orders. NORSOK standard Page 2 of 30, NORSOK standard Z 008 Rev 2 Nov 2001. This NORSOK standard is applicable for preparation and optimisation of maintenance programs for plant. systems and equipment including, Offshore topside systems.
Sub sea production systems, Oil and gas terminals, The systems involving the following types of equipment. Mechanical equipment, Static and rotating equipment. Instrumentation, Electrical equipment, Excluded from the scope of this NORSOK standard are. Load bearing structures, Floating structures, Risers and pipelines. In principle all types of fault modes and failure mechanisms are covered by this NORSOK standard. This NORSOK standard covers, Definition of relevant nomenclature.
Guidelines for criticality analysis including, Functional breakdown of plants and plant systems in main functions and sub functions. Identification of main function and sub function redundancy. Definition of failure consequence classes, Assessment of the consequences of loss of main functions and sub functions. Assignment of equipment to sub functions and associated consequence classes. Examples of application of the functional breakdown and the criticality analysis. Selection of equipment where preventive maintenance activities can be based on generic maintenance. Selection of equipment where detailed RCM FMECA analysis is recommended. Establishment of maintenance activities and intervals specification of resource and competence. requirements and evaluation of shutdown requirements. Preparation and optimisation of generic maintenance concepts. Design evaluations, Prioritisation of work orders, Spare part evaluations. 2 Normative references, The following standards include provisions which through reference in this text constitute provisions of this. NORSOK standard Latest issue of the references shall be used unless otherwise agreed Other recognized. standards may be used provided it can be shown that they meet or exceed the requirements of the. standards referenced below, DNV RP G 101 Risk Based Inspection of Topside Static Mechanical Equipment.
IEC 60300 3 11 Application guide Reliability Centred Maintenance. OLF 066 Rev no 01 Recommended guidelines for the application of IEC 61508 and IEC 61511 in the. petroleum activities on the Norwegian continental shelf. NORSOK Z 016 Regularity management reliability technology. NORSOK Z 013 Risk and emergency preparedness analysis. NORSOK standard Page 3 of 30, NORSOK standard Z 008 Rev 2 Nov 2001. 3 Definitions and abbreviations, 3 1 Definitions, For the purpose of of this NORSOK standard the following terms and definitions apply. verbal form used for statements of possibility and capability whether material physical or casual. condition based maintenance, preventive maintenance consisting of performance and parameter monitoring and the subsequent actions. NOTE Performance and parameter monitoring may be scheduled on request or continuously. CEN prEN 13306, condition monitoring, the continuous or periodic measurement and interpretation of data to indicate the degraded condition. potential failure of an item and the need for maintenance BS 3811. NOTE Condition monitoring is normally carried out with the item in operation in an operating state or removed but not subject to. dismantling, corrective maintenance, maintenance carried out after fault recognition and intended to put an item into a state in which it can.
perform a required function prEN 13306, criticality analysis. quantitative analysis of events and faults and the ranking of these in order of the seriousness of their. consequences BS 3811, the termination of the ability of an item to perform a required function. NOTE After failure the item has a fault Failure is an event as distinguished from a fault which is a state prEN 13306. failure mechanism, physical chemical or other processes which lead or have led to failure prEN 13306. failure rate, number of failures of an item in a given time interval divided by the time interval prEN 13306. NOTE 1 This value is an approximation, NOTE 2 In some cases time can be replaced by units of use.
In most cases 1 MTTF can be used as the predictor for the failure rate i e the average number of failures per unit of time in the long. run if the units are replaced by an identical unit at failure Failure rate can be based on operational or calendar time. state of an item characterised by inability to perform a required function excluding the inability during. preventive maintenance or other planned actions or due to lack of external resources. NOTE A fault is often a result of a failure of the item itself but may exist without failure prEN 13306. NORSOK standard Page 4 of 30, NORSOK standard Z 008 Rev 2 Nov 2001. fault mode, one of the possible states of a faulty item for a given required function. NOTE The use of the term failure mode in this sense is deprecated prEN 13306. failure mode, the observed manner of failure ISO 14224. fault mode and effect analysis FMEA, qualitative method of reliability analysis which involves the study of the fault modes which can exist in every. sub item of the item and the effects of each fault mode on other sub items of the item and on the required. functions of the item BS 3811, fault mode effects and criticality analysis FMECA.
quantitative method of reliability analysis which involves a fault modes and effects analysis together with a. consideration of the probability of failure modes their consequence and ranking of effects and the. seriousness of the faults BS 3811, situation that could occur during the lifetime of a product system or plant that has the potential for human. injury damage to property damage to the environment or economic loss BS 3811. hidden fault, fault which is not evident to the operator during normal operation. inspection, activity carried out periodically and used to assess the progress of damage in a component. NOTE 1 Inspection can be by means of technical instruments e g NDT or as visual examination. NOTE 2 prEN 13306 has been deviated from in order to apply to the most common use of the term inspection in the oil and gas. industry which relates inspection and inspection management to the activity of checking the conformity of the equipment by NDT. instruments or visual examination at regular intervals. any part component device subsystem functional unit equipment or system that can be individually. considered prEN 13306, maintenance, combination of all technical administrative and managerial actions including supervision actions during the. life cycle of an item intended to retain it in or restore it to a state in which it can perform the required. function prEN 13306, maintenance analysis, systematic analysis for identification and evaluation of required maintenance activities including estimation.
of time and resources needed for the maintenance performance. maintenance management, all activities the management that determine the maintenance objectives strategies and the responsibilities. and implement them by means such as maintenance planning maintenance control and supervision. improvement of methods in the organisation including economical aspects prEN 13306. NORSOK standard Page 5 of 30, NORSOK standard Z 008 Rev 2 Nov 2001. verbal form used to indicate a course of action permissible within the limits of this NORSOK standard. preventive maintenance, maintenance carried out at predetermined intervals or according to prescribed criteria and intended to. reduce the probability of failure or the degradation of the function of an item prEN 13306. redundancy, in an item the existence of more than one means at a given instant of time for performing a required function. prEN 13306, repair time, that part of active corrective maintenance item during which repair is carried out on an item prEN 13306.
combination of the probability or frequency of occurrence of a defined hazard and the magnitude of the. consequences of the occurrence BS 3811, verbal form used to indicate requirements strictly to be followed in order to conform to this NORSOK. standard and from which no deviation is permitted unless accepted by all involved parties. verbal 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 necessarily. 3 2 Abbreviations, AFFF aqueous film forming foam, F G fire and gas. FMEA failure mode and effect analysis, FMECA fault mode effect and criticality analysis. HSE health safety and environment, MF main function. NDT non destructive testing, P ID process and instrumentation diagram.
RCM reliability centred maintenance, SIL safety integrity level. NORSOK standard Page 6 of 30, NORSOK standard Z 008 Rev 2 Nov 2001. 4 Application of this NORSOK standard, 4 1 General. The purpose of this NORSOK standard is to establish a basis for preparation and optimisation of. maintenance programs for new and in service oil and gas plants This NORSOK standard describes an. efficient and rational working process resulting in an optimised maintenance program based on risk analysis. and cost benefit principles, As a basis for risk evaluations and establishment of maintenance activities this NORSOK standard support. the use of practical operation and maintenance experience provided this experience is documented for the. relevant types of plant equipment Application of this general maintenance practice is referred to as generic. maintenance concepts see 7 1 3 This NORSOK standard recommends that a more comprehensive RCM. analysis see IEC 60300 3 11 is carried out when relevant generic maintenance concepts are not available. Application of the generic maintenance concepts is efficient for new facilities with no site specific operational. experience and for facilities where the current maintenance program has not been established according to. criteria for safe and cost efficient operations A more detailed RCM analysis is recommended for further. optimisation of the maintenance activities for plants in service taking into account the knowledge and. experience of operation of the actual plant equipment Both approaches the generic maintenance concepts. and the RCM analysis are based on the principles of ri. This NORSOK standard is developed by NTS with broad industry participation Please note that whilst every effort BS 3811 3 1 6 failure

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