Mar 2016
Gas Distribution
PRISM (Pipe Replacement in situ Manufacturing) – Above Ground Trial
Mar 2016
Sep 2016
National Grid Gas Distribution
NGGD Project Manager – Sharon Harrison
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Network Innovation Allowance
Gas Distribution Networks
Above ground trials of various technical solutions in a yard environment will be carried out, by deploying them in pipe and applying PRISM. The samples will then be inspected and tested by an independent consultant and a report issued.

A number of 25m runs of pipe will be subjected to PRISM application and 5m of technical solution testing, samples will then be taken for inspection and testing to derive the applied resin thickness profile along the length of the test sample.

  • To derive and demonstrate the thickness profile and variation of the applied resin over a 20m length of 4” and 6” pipe to determine the distribution curve over the length.
  • To demonstrate the suitability and test identified solutions for dealing with joints, other features such as  ferrules, termination of PRISM in the existing main and determine their effect on the distribution of PRISM application.
  • A demonstrated profile of PRISM application that can be used to determine the settings needed to maintain the minimum thickness required when in use on the network to ensure consistent structural strength along any applied length.

  • A completed process of selection on which products to proceed with to the next stage to solve the technical challenges such as joint spanning and end mains connection.