BS EN 61511-3:2017
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
Hardcopy , PDF
English
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.
| 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 |
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.
| Standards | Relationship |
| I.S. EN 61511-3:2017 | Identical |
| DIN EN 61511-3 : 2005 | Identical |
| EN 61511-3:2017 | Identical |
| IEC 61511-3:2016 | Identical |
| NBN EN 61511-3 : 2005 | Identical |
| NF EN 61511-3 : 2017 | Identical |
| UNE-EN 61511-3:2017 | Equivalent |
| UNE-EN 61511-3:2006 | Identical |
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