Dec 2013
Gas Distribution
Cast Iron Fitness For Purpose (CIFFP)
Dec 2013
Nov 2014
National Grid Gas Distribution, Northern Gas Networks, SGN and Wales and West Utilities
Andrew Newton – National Grid Innovation Portfolio Manager
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Network Innovation Allowance
Gas Distribution Networks
The scope of this project includes:

  • Review of cast iron fitness for purpose (FFP) assessment methods

  • Review MRPS risk screening inputs

  • Assess historical cast iron pipe failure data

  • Review the remediation techniques under consideration by the participants

  • Review of cast iron inspection techniques

  • Statistical reliability of local inspection data

  • Source data on typical pipe loading conditions

  • Consideration regarding potential algorithms to be used in the FFP assessment

  • Consideration regarding the balance of weighting that should be given to the FFP calculations versus the historical performance data for the asset

  • Outline decision support methodology

To develop a methodology that satisfies obligations under the Pipeline Safety Regulations to enable Tier 2/3 pipes to be safely maintained for continued use, or be categorised in such a way to prioritise for remediation or decommissioning. In this context remediation could involve internal repair of pipe and/or joints, or semi structural linings, or fully structural linings if the pipe required decommissioning.

Success of the project would be:

  • Evidence of national and global work on CI test assessments. Contact with suitable broad range of stakeholders and review of scientific papers

  • Substantive and reliable data has been sourced on CI failure data. Learning adds value in addition to pipe risk score and that the output feeds into the pass/fail criteria methodology

  • Commercially available and cost effective CI inspection techniques have been identified. A suitable range of techniques that enables pipes of greater or lesser risk score or other risk factors can be assessed. Ideally 3 or 4 techniques are or could be developed to be applied to pipes of differing initial levels of risk score

  • Technically acceptable, cost effective and practical decision support methodologies have been identified. That GDNs reach consensus on approach and external stakeholders sign on (HSE).