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  • BS EN 61511-3:2017 (published 2017-05)

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    Functional safety. Safety instrumented systems for the process industry sector Guidance for the determination of the required safety integrity levels

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  22-05-2017

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    FOREWORD
    INTRODUCTION
    1 Scope
    2 Normative references
    3 Terms, definitions and abbreviations
    Annex A (informative) - Risk and safety
            integrity - general guidance
    Annex B (informative) - Semi-quantitative
            method - event tree analysis
    Annex C (informative) - The safety layer
            matrix method
    Annex D (informative) - A semi-qualitative method:
            calibrated risk graph
    Annex E (informative) - A qualitative method:
            risk graph
    Annex F (informative) - Layer of protection
            analysis (LOPA)
    Annex G (informative) - Layer of protection analysis
            using a risk matrix
    Annex H (informative) - A qualitative approach for
            risk estimation & safety integrity level
            (SIL) assignment
    Annex I (informative) - Designing & calibrating a
            risk graph
    Annex J (informative) - Multiple safety systems
    Annex K (informative) - As low as reasonably
            practicable (ALARP) and tolerable risk
            concepts
    Bibliography
    Annex ZA (normative) - Normative references to
             international publications with their
             corresponding European publications

    Abstract - (Show below) - (Hide below)

    Gives information on: - the underlying concepts of risk and the relationship of risk to safety integrity; - the determination of tolerable risk; - a number of different methods that enable the safety integrity level (SIL) for the safety instrumented functions (SIF) to be determined; - the impact of multiple safety systems on calculations determining the ability to achieve the desired risk reduction.

    Scope - (Show below) - (Hide below)

    IEC 61511-3:2016 is available as IEC 61511-3:2016 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.



    IEC 61511-3:2016 applies when functional safety is achieved using one or more SIF for the protection of either personnel, the general public, or the environment; may be applied in non-safety applications such as asset protection; illustrates typical hazard and risk assessment methods that may be carried out to define the safety functional requirements and SIL of each SIF; illustrates techniques/measures available for determining the required SIL; provides a framework for establishing SIL but does not specify the SIL required for specific applications; does not give examples of determining the requirements for other methods of risk reduction. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: Additional H&RA example(s) and quantitative analysis consideration annexes are provided.

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    Committee GEL/65/1
    Development Note Renumbers and supersedes BS IEC 61511-3. 2004 version incorporates amendment 15578 to BS IEC 61511-3. Supersedes 99/244276 DC. (05/2005) Supersedes 12/30264232 DC. (05/2017)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    EEMUA 217 : 2011 SAFE AND EFFECTIVE OPERATION OF STORAGE TANKS FOR OIL MOVEMENTS

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC 61025:2006 Fault tree analysis (FTA)
    EN 61508-6:2010 FUNCTIONAL SAFETY OF ELECTRICAL/ELECTRONIC/PROGRAMMABLE ELECTRONIC SAFETY-RELATED SYSTEMS - PART 6: GUIDELINES ON THE APPLICATION OF IEC 61508-2 AND IEC 61508-3
    IEC 62551:2012 Analysis techniques for dependability - Petri net techniques
    IEC 61511-1:2016+AMD1:2017 CSV Functional safety - Safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hardware and application programming requirements
    CEN ISO/TR 12489 : 2016 PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES - RELIABILITY MODELLING AND CALCULATION OF SAFETY SYSTEMS (ISO/TR 12489:2013)
    IEC 61508-5:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels (see Functional Safety and IEC 61508)
    IEC 61165:2006 Application of Markov techniques
    EN 61165 : 2006 APPLICATION OF MARKOV TECHNIQUES
    EN 62551 : 2012 ANALYSIS TECHNIQUES FOR DEPENDABILITY - PETRI NET TECHNIQUES (IEC 62551:2012)
    EN 61025 : 2007 FAULT TREE ANALYSIS (FTA)
    EN 61508-5:2010 FUNCTIONAL SAFETY OF ELECTRICAL/ELECTRONIC/PROGRAMMABLE ELECTRONIC SAFETY-RELATED SYSTEMS - PART 5: EXAMPLES OF METHODS FOR THE DETERMINATION OF SAFETY INTEGRITY LEVELS
    ISO/TR 12489:2013 Petroleum, petrochemical and natural gas industries Reliability modelling and calculation of safety systems
    IEC 61508-6:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 6: Guidelines on the application of IEC 61508-2 and IEC 61508-3 (see Functional Safety and IEC 61508)
    IEC TS 62556:2014 Ultrasonics - Field characterization - Specification and measurement of field parameters for high intensity therapeutic ultrasound (HITU) transducers and systems
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