Aug 2013
Gas Distribution
Cured In-Place Pipe (CIPP) (Stage 2)
Aug 2013
Mar 2016
SGN, National Grid Gas Distribution, Northern Gas Networks and Wales and West Utilities
SGN - Oliver Machan (Innovations Project Manager) SGN - Andy Musgrave (Project Manager) NGG - John Reader (Project Manager) NGG - Darren White (Innovation Portfolio Manager) NGN – Ian Foster (Project)
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Network Innovation Allowance
GD - Mains Replacement
Maintenance & Inspection
The scope of this project is to demonstrate ‘fitness for purpose’ of CIP lining technologies, focusing on iron mains of 8” diameter and above operating up to 2 bar pressure.

Stage 2 of this project directly follows the successful completion of Stage 1, which has developed the Performance Specifications and Best Practice Guide for CIP applications. This aspect of the project will look to review available pipe liner/lining technologies in both the gas and water sectors, and to develop performance specifications and proposed best practice suitable for UK gas distribution deployment aligned to the prevailing commercial and safety regulatory regimes.

The objective of Stage 2 is to test and validate against the Stage 1 documents, under controlled conditions, a range of available CIP lining solutions with the goal of establishing the generic approach as ‘fit for purpose’ as a rehabilitation technique for iron gas mains up to 2 bar. It is expected that the CIP performance specification and best practice guide will be refined during this stage, and that the tests may identify a development gap for certain technologies ahead of their acceptance. The test programme will embrace the lining materials, the installed liner, and installation practice together with the evaluation of a range of routine maintenance activities (e.g. flow stopping, connections, jointing and repair).

The project will be deemed to be successful if the following criteria are met:

  • Production of a contractor certification scheme

  • Successful completion of field trials after 12 months from commencement of the project

  • Production of a revised risk assessment framework

  • Identification of a range of CIP technologies and solutions deemed ‘fit-for-purpose’ as a remediation approach for iron mains up to 2 bar pressure over a range of diameter classes from 8” to 36”

  • A cost benefit analysis of the new technology against current methods.