EN ISO 16708:2006

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

ISO 16708:2006 specifies the functional requirements and principles for design, operation and re-qualification of pipelines in the petroleum and natural gas industries using reliability based limit state methods as permitted by ISO 13623. Reliability-based limit state methods provide a systematic way to predict pipeline safety in design and operation.ISO 16708:2006 supplements ISO 13623 and can be used in cases where ISO 13623 does not provide specific guidance and where limit states methods can be applied, such as, but not limited to- qualification of new concepts, e.g. when new technology is applied or for design scenarios where industry experience is limited,- re-qualification of the pipeline due to a changed design basis, such as service-life extension, which can include reduced uncertainties due to improved integrity monitoring and operational experience,- collapse under external pressure in deep water,- extreme loads, such as seismic loads (e.g. at a fault crossing), ice loads (e.g. by impact from ice keels),- situations where strain-based criteria can be appropriate.ISO 16708:2006 applies to rigid metallic pipelines on-land and offshore used in the petroleum and natural gas industries.