IEC 61882:2016
(Main)Hazard and operability studies (HAZOP studies) - Application guide
Hazard and operability studies (HAZOP studies) - Application guide
IEC 61882:2016 provides a guide for HAZOP studies of systems using guide words. It gives guidance on application of the technique and on the HAZOP study procedure, including definition, preparation, examination sessions and resulting documentation and follow-up. Documentation examples, as well as a broad set of examples encompassing various applications, illustrating HAZOP studies are also provided. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- clarification of terminology as well as alignment with terms and definitions within ISO 31000:2009 and ISO Guide 73:2009;
- addition of an improved case study of a procedural HAZOP. Keywords: HAZOP, risks and operability problems
Études de danger et d'exploitabilité (études HAZOP) - Guide d'application
L'IEC 61882:2016 constitue un guide pour les études HAZOP de systèmes qui utilisent des mots-guides. Elle donne des lignes directrices relatives à l'application de la technique et à la procédure de l'étude HAZOP, y compris la définition, la préparation, les sessions d'examen ainsi que les documents et le suivi qui en résultent. Elle fournit également des exemples de documentation ainsi qu'un grand choix d'exemples concernant diverses applications qui présentent les études HAZOP. Cette deuxième édition annule et remplace la première édition parue en 2001. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- terminologie clarifiée, et alignement sur les termes et définitions de l'ISO 31000:2009 et du Guide ISO 73:2009;
- ajout d'une étude de cas améliorée d'un HAZOP de procédure. Mots clés: HAZOP, risques et les problèmes d'exploitabilité
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IEC 61882 ®
Edition 2.0 2016-03
REDLINE VERSION
INTERNATIONAL
STANDARD
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Hazard and operability studies (HAZOP studies) – Application guide
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
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latest edition, a corrigenda or an amendment might have been published.
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IEC 61882 ®
Edition 2.0 2016-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Hazard and operability studies (HAZOP studies) – Application guide
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 03.100.50; 03.120.01; 13.020.30 ISBN 978-2-8322-3234-7
– 2 – IEC 61882:2016 RLV © IEC 2016
CONTENTS
FOREWORD. 4
INTRODUCTION . 2
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviations . 8
3.1 Terms and definitions . 8
3.2 Abbreviations . 11
4 Principles Key features of HAZOP . 11
4.1 Overview General . 11
4.2 Principles of examination. 12
4.3 Design representation . 14
4.3.1 General . 14
4.3.2 Design requirements and design intent . 14
5 Applications of HAZOP . 15
5.1 General . 15
5.2 Relation to other analysis tools . 16
5.3 HAZOP study limitations . 16
5.4 Hazard Risk identification studies during different system life cycle phases
stages . 17
5.4.1 Concept and definition phase stage . 17
5.4.2 Design and development phase Development stage . 17
5.4.3 Manufacturing and installation phase Realization stage . 17
5.4.4 Operation and maintenance phase Utilization stage . 17
5.4.5 Decommissioning or disposal phase Enhancement stage . 18
5.4.6 Retirement stage. 18
6 The HAZOP study procedure . 18
6.1 General . 18
6.2 Definitions . 20
6.2.1 Initiate the study . 20
6.2.2 Define scope and objectives . 20
6.2.3 Define roles and responsibilities . 21
6.3 Preparation work . 22
6.3.1 General Plan the study . 22
6.3.2 Design description Collect data and documentation . 23
6.3.3 Establish guide words and deviations . 24
6.4 Examination . 25
6.4.1 Structure the examination . 25
6.4.2 Perform the examination . 25
6.5 Documentation and follow up . 28
6.5.1 General . 28
6.5.2 Styles Establish method of recording . 29
6.5.3 Output of the study. 29
6.5.4 Reporting requirements Record information . 30
6.5.5 Sign off the documentation . 30
6.5.6 Follow-up and responsibilities . 30
7 Audit .
Annex A (informative) Methods of reporting recording . 32
A.1 Reporting Recording o pt i ons . 32
A.2 HAZOP worksheet . 32
A.3 Marked-up representation . 33
A.4 HAZOP study report . 33
Annex B (informative) Examples of HAZOP studies . 34
B.1 General . 34
B.2 Introductory example . 34
B.3 Procedures . 39
B.4 Automatic train protection system . 42
B.4.1 General . 42
B.4.2 A pp l ic at i on . 42
B.5 Example involving emergency planning . 45
B.6 Oil vaporizer .
B.6 Piezo valve control system . 49
B.7 HAZOP of a train stabling yard horn procedure . 58
Bibliography . 69
Figure 1 – The HAZOP study procedure. 20
Figure 2 – Flow chart of the HAZOP examination procedure – Element Property first
sequenc e . 27
Figure 3 – Flow chart of the HAZOP examination procedure – Guide word first
sequenc e . 28
Figure B.1 – Simple flow sheet . 35
Figure B.2 – Train-carried ATP equipment . 42
Figure B.3 – Piezo valve control system . 49
Figure B.4 – Oil vaporizer .
Table 1 – Example of basic guide words and their generic meanings . 13
Table 2 – Example of guide words relating to clock time and order or sequence . 13
Table 3 – Examples of deviations and their associated guide words. 24
Table B.1 – Properties of the system under examination . 35
Table B.2 – Example HAZOP worksheet for introductory example . 36
Table B.3 – Example HAZOP worksheet for procedures example . 40
Table B.4 – Example HAZOP worksheet for automatic train protection system . 43
Table B.5 – Example HAZOP worksheet for emergency planning . 46
Table B.6 – Example HAZOP worksheet for oil vaporizer .
Table B.6 – System design intent . 50
Table B.7 – Example HAZOP worksheet for piezo valve control system . 51
Table B.8 – Operational breakdown matrix for train stabling yard horn procedure . 60
Table B.9 – Example HAZOP worksheet for train stabling yard horn procedure . 54
– 4 – IEC 61882:2016 RLV © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HAZARD AND OPERABILITY STUDIES (HAZOP STUDIES) –
APPLICATION GUIDE
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The form
...
IEC 61882 ®
Edition 2.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Hazard and operability studies (HAZOP studies) – Application guide
Études de danger et d'exploitabilité (études HAZOP) – Guide d'application
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 61882 ®
Edition 2.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Hazard and operability studies (HAZOP studies) – Application guide
Études de danger et d'exploitabilité (études HAZOP) – Guide d'application
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 03.100.50; 03.120.01; 13.020.30 ISBN 978-2-8322-3208-8
– 2 – IEC 61882:2016 © IEC 2016
CONTENTS
FOREWORD. 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 9
4 Key features of HAZOP . 10
4.1 General . 10
4.2 Principles of examination. 11
4.3 Design representation . 12
4.3.1 General . 12
4.3.2 Design requirements and design intent . 13
5 Applications of HAZOP . 13
5.1 General . 13
5.2 Relation to other analysis tools . 14
5.3 HAZOP study limitations . 14
5.4 Risk identification studies during different system life cycle stages . 15
5.4.1 Concept stage . 15
5.4.2 Development stage . 15
5.4.3 Realization stage . 15
5.4.4 Utilization stage . 15
5.4.5 Enhancement stage . 16
5.4.6 Retirement stage. 16
6 The HAZOP study procedure . 16
6.1 General . 16
6.2 Definitions . 17
6.2.1 Initiate the study . 17
6.2.2 Define scope and objectives . 17
6.2.3 Define roles and responsibilities . 18
6.3 Preparation . 19
6.3.1 Plan the study . 19
6.3.2 Collect data and documentation . 20
6.3.3 Establish guide words and deviations . 20
6.4 Examination . 21
6.4.1 Structure the examination . 21
6.4.2 Perform the examination . 22
6.5 Documentation and follow up . 24
6.5.1 General . 24
6.5.2 Establish method of recording . 25
6.5.3 Output of the study. 25
6.5.4 Record information . 25
6.5.5 Sign off the documentation . 26
6.5.6 Follow-up and responsibilities . 26
Annex A (informative) Methods of recording . 27
A.1 Recording options . 27
A.2 HAZOP worksheet . 27
A.3 Marked-up representation . 28
A.4 HAZOP study report . 28
Annex B (informative) Examples of HAZOP studies . 29
B.1 General . 29
B.2 Introductory example . 29
B.3 Procedures . 34
B.4 Automatic train protection system . 37
B.4.1 General . 37
B.4.2 Application . 37
B.5 Example involving emergency planning . 40
B.6 Piezo valve control system . 44
B.7 HAZOP of a train stabling yard horn procedure . 48
Bibliography . 59
Figure 1 – The HAZOP study procedure . 17
Figure 2 – Flow chart of the HAZOP examination procedure – Property first sequence . 23
Figure 3 – Flow chart of the HAZOP examination procedure – Guide word first
sequence . 24
Figure B.1 – Simple flow sheet . 30
Figure B.2 – Train-carried ATP equipment . 37
Figure B.3 – Piezo valve control system . 44
Table 1 – Example of basic guide words and their generic meanings . 11
Table 2 – Example of guide words relating to clock time and order or sequence . 12
Table 3 – Examples of
...
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