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BS EN 61511-3:2017

Current
Current

The latest, up-to-date edition.

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

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

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.

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.

Committee
GEL/65/1
DevelopmentNote
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)
DocumentType
Standard
Pages
108
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
I.S. EN 61511-3:2017 Identical
DIN EN 61511-3 : 2005 Identical
SN EN 61511-3 : 2017 Identical
EN 61511-3:2017 Identical
IEC 61511-3:2016 Identical
UNE-EN 61511-3:2006 Identical
NBN EN 61511-3 : 2005 Identical
NF EN 61511-3 : 2017 Identical

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

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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