Aug 2015
Gas Distribution
Corrosion Mapping System for Buried Orpheus Regulator Modules – Phase 2
Aug 2015
Jul 2018
Mark Skerritt, Innovation Project Manager
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Network Innovation Allowance
GD - Reliability and maintenance
Condition Monitoring, Maintenance & Inspection and Gas Distribution Networks
Phase 1 of this Project looked at the feasibility, design and development of a BSD which would enable the internal long range NDT inspection of buried Orpheus Regulator Modules without having to excavate or grit-blast the pipework.

Phase 2 of this Project involves collaboration with James Fisher Nuclear Limited (JFN) to design, manufacture and site trial the BSD; also completing the development of a long range NDT technique suitable for inspecting buried ORPHEUS Regulator Modules. The new BSD is expected to corrosion map 100% of the internal surfaces of 14”, 16”, 18”, 20”, 24” and 30” ORPHEUS regulator modules.

Site trials will be undertaken in the Scotland (SC) and South of England (SOE) Networks; all sites will be selected by SGN and jointly attended by SGN, JFN and a suitable Technical Service Provider (TSP) to assess suitability.

This Project has the following ‘key’ goals and objectives:


·         Manufacture a BSD suitable for use on SGNs distribution networks


·         Creation of specific Risk Assessment Method Statements (RAMS) and Training Packages for use with the  BSDs (UT) NDT procedure


·         Undertake offsite and live field trials to ensure the new BSD meets SGN requirements


·         Validation and approval of the BSDs Ultrasonic (UT) NDT procedure; confirming that this new procedure fully meets SGN requirements

The key success criteria for the Project will be:

  • Eliminating the requirement for excavating and reinstating buried Orpheus Regulator Modules when carrying out inspections

  • Eliminating the requirement for grit blasting

  • Eliminating environmental concerns arising from waste disposal issues caused by grit blasting and excavation

  • Proving the potential to access a greater surface area for 95-100% NDT
  • Demonstrating compliance with current industry legislation

  • Reducing the operational time usually associated with the inspection of a buried Orpheus Regulator Module