BS IEC 61511-3 : 2003 AMD 15578
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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FUNCTIONAL SAFETY - SAFETY INSTRUMENTED SYSTEMS FOR THE PROCESS INDUSTRY SECTOR - PART 3: GUIDANCE FOR THE DETERMINATION OF THE REQUIRED SAFETY INTEGRITY LEVELS
16-05-2005
23-11-2012
FOREWORD
INTRODUCTION
1 Scope
2 Terms, definitions and abbreviations
3 Risk and safety integrity - general guidance
3.1 General
3.2 Necessary risk reduction
3.3 Role of safety instrumented systems
3.4 Safety integrity
3.5 Risk and safety integrity
3.6 Allocation of safety requirements
3.7 Safety integrity levels
3.8 Selection of the method for determining the
required safety integrity level
Annex A (informative) As Low As Reasonably Practicable
(ALARP) and tolerable risk concepts
Annex B (informative) Semi-quantitative method
Annex C (informative) The safety layer matrix method
Annex D (informative) Determination of the required safety
integrity levels - a semi-qualitative method:
calibrated risk graph
Annex E (informative) Determination of the required safety
integrity levels - a qualitative method: risk graph
Annex F (informative) Layer of protection analysis (LOPA)
Figures
Tables
Gives information on: - the underlying concepts of risk, the relationship of risk to safety integrity; - the determination of tolerable risk; - a number of different methods that enable the safety integrity levels for the safety instrumented functions to be determined.
| Committee |
GEL/65/1
|
| DevelopmentNote |
Supersedes 99/244276 DC. (05/2003) Also available as a part of BS KIT 127. (06/2004) Renumbered and superseded by BS EN 61511-3. (05/2005)
|
| DocumentType |
Standard
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| IEC 61511-3:2016 | Identical |
| 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 |
| DIN V 19250:1994-05 | CONTROL TECHNOLOGY; FUNDAMENTAL SAFETY ASPECTS TO BE CONSIDERED FOR MEASUREMENT AND CONTROL EQUIPMENT |
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