EN ISO 16708:2006

SLOVENSKI STANDARD
01-januar-2007
Industrija nafte in zemeljskega plina - Transportni cevovodni sistemi - Metode na
podlagi mejnih stanj zanesljivosti (ISO 16708:2006)
Petroleum and natural gas industries - Pipeline transportation systems - Reliability-based
limit state methods (ISO 16708:2006)
Erdöl- und Erdgasindustrie - Rohrleitungstransportsysteme - Zuverlässigkeitsanalysen
(ISO 16708:2006)
Industries du pétrole et du gaz naturel - Systemes de transport par conduites - Méthodes
aux états-limites basées sur la fiabilité (ISO 16708:2006)
Ta slovenski standard je istoveten z: EN ISO 16708:2006
ICS:
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 16708
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2006
ICS 75.200
English Version
Petroleum and natural gas industries - Pipeline transportation
systems - Reliability-based limit state methods (ISO
16708:2006)
Industries du pétrole et du gaz naturel - Systèmes de Erdöl- und Erdgasindustrie - Rohrleitungstransportsysteme
transport par conduites - Méthodes aux états-limites - Zuverlässigkeitsanalysen (ISO 16708:2006)
basées sur la fiabilité (ISO 16708:2006)
This European Standard was approved by CEN on 3 March 2006.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16708:2006: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 16708:2006) has been prepared by Technical Committee ISO/TC 67
"Materials, equipment and offshore structures for petroleum and natural gas industries" in
collaboration with Technical Committee CEN/TC 12 "Materials, equipment and offshore
structures for petroleum, petrochemical and natural gas industries", the secretariat of which is
held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by October 2006, and conflicting national
standards shall be withdrawn at the latest by October 2006.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 16708:2006 has been approved by CEN as EN ISO 16708:2006 without any
modifications.
INTERNATIONAL ISO
STANDARD 16708
First edition
2006-04-01
Petroleum and natural gas industries —
Pipeline transportation systems —
Reliability-based limit state methods
Industries du pétrole et du gaz naturel — Systèmes de transport par
conduites — Méthodes aux états-limites basées sur la fiabilité

Reference number
ISO 16708:2006(E)
©
ISO 2006
ISO 16708:2006(E)
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ii © ISO 2006 – All rights reserved

ISO 16708:2006(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Symbols and abbreviated terms . 5
4.1 Symbols . 5
4.2 Abbreviated terms . 6
5 Principles for design and operation . 7
6 Reliability based limit state methods. 9
6.1 General. 9
6.2 Design and operational data basis — Data gathering . 9
6.3 Safety requirements — target. 9
6.4 Failure mode analysis . 10
6.5 Uncertainty analysis. 10
6.6 Reliability analysis. 11
6.7 Safety and risk assessment. 11
7 Design and operational requirements . 12
7.1 General. 12
7.2 Design and construction. 12
7.3 Operation and maintenance . 12
7.4 Re-qualification . 13
7.5 Hazards . 13
8 Acceptance criteria and safety classes. 13
8.1 Safety requirements . 13
8.2 Classification of limit states . 14
8.3 Categorization of fluids. 14
8.4 Pipeline location and consequence categorization . 15
8.5 Safety classes . 16
9 Target safety levels and risk levels. 17
10 Failure modes. 17
10.1 General. 17
10.2 Internal pressure induced failure modes .17
10.3 External pressure induced failure modes . 18
10.4 Failure due to external load effects . 18
10.5 Failure due to third-party activity. 19
10.6 Corrosive environment induced failure modes . 19
10.7 Failure due to combined loads. 19
11 Pipeline operational management . 20
11.1 General. 20
11.2 Operational management procedures. 20
Annex A (informative) Uncertainty and reliability analysis — Method description. 23
Annex B (informative) Statistical database — Uncertainty values. 43
Annex C (informative) Target safety levels — Recommendations. 49
Bibliography . 56

ISO 16708:2006(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16708 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline transportation systems.
iv © ISO 2006 – All rights reserved

ISO 16708:2006(E)
Introduction
The International Standard ISO 13623 allows the use of innovative techniques and procedures such as
reliability-based limit state methods providing the minimum requirements of ISO 13623 are satisfied.
This International Standard provides the supplement to ISO 13623 in giving recommendations and specifying
the framework and principles for the application of the probabilistic approach, i.e. “reliability-based limit state
methods”.
Pipeline integr
...