Nov 2013
Gas Distribution
Stent Bag
Nov 2013
Nov 2019
Alex Stewart, Innovation Project Manager
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Network Innovation Allowance
GD - Safety and emergency
Maintenance & Inspection and Gas Distribution Networks
The scope of this project is to design, develop and test an innovative stent bag system that can maintain gas supplies during high volume gas escapes and reduce the potential loss of supply to customers.

The project will:

  • Design and develop proof of concept
  • Conduct a feasibility study after completion of design
  • Develop a prototype design
  • Conduct a field trial for product verification
  • Produce a work procedure and report on the development of the equipment
  • Conduct a full scale assessment prior to phase 2 and transfer to business as usual.

The aim of this project is to design and field trial a prototype piece of equipment that will facilitate the repair of a damaged gas main whilst maintaining the supply of gas through the pipe. The salient objectives are:

  • Review relevant specifications and manufacturer information
  • Produce a proof of concept and design study
  • Produce a feasibility study based on proposed design
  • Sarco to produce prototype product
  • Propose of appropriate test programme to investigate performance
  • Conduct field trial (location yet to be determined)
  • Produce training material in support of field trial.
  • Produce report detailing the findings of the field trial
  • Evaluate the performance of the Stent Bag through field trial