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2009

PE Service Pipe Disconnection Phase 2

Abstract

The PE Service Pipe disconnection project is an evolution from the development project in phase 1, this project is a monitored field trial evaluating a new, non-excavation method for permanently disconnecting polyethylene (PE) gas service pipes that terminate in external meter boxes. Developed in collaboration with Steve Vick International and UK Gas Transporters, the technique uses a foam plug and sealant system deployed through the external emergency control valve to safely isolate and abandon the service pipe as near as reasonably practicable to the main. The aim is to demonstrate compliance with gas safety legislation while reducing the need for highway excavation, lowering costs, improving safety, and minimising disruption. The trial will gather operational, safety, and performance evidence to support potential wider adoption and HSE acceptance.

The field trial offers strong potential for new learning across technical, operational, and regulatory dimensions:

  • Real-world applicability limits

    The trial will generate clear evidence on which service configurations are suitable or unsuitable (e.g. pipe lengths, diameter changes, bends). This helps define realistic boundaries for use and informs future design improvements.

  • Performance in live network conditions

    While workshop testing shows strong results, the trial will provide learning on how the foam isolation performs under true operational variables such as installation variability, environmental conditions, and network pressures over time.

  • Operational behaviour and human factors

    Feedback from operatives will highlight:

    • Ease of installation
    • Common errors or deviations
    • Training adequacy
    • Suitability for lone working

    This learning can drive refinements to procedures, kit design, and training models.

  • Cost and productivity validation

    The project will provide real data on:

    • Actual job times
    • Labour and resource savings
    • Avoided excavation and reinstatement costsThis supports stronger business cases and future regulatory submissions.

  • Service population insight

    Capturing how many services can versus cannot be treated with this method improves understanding of the national PE service estate and informs future investment and planning strategies.

  • Risk and assurance learning

    Monitoring near misses, deviations, or unexpected behaviours will enhance understanding of residual risks and strengthen safety cases for similar non-excavation techniques.

  • Regulatory and assurance frameworks

    Engagement with HSE during the trial provides learning on how goal-setting regulation can be satisfied using innovative techniques, potentially shaping how future innovations are evidenced and approved.

  • Future innovation opportunities

    Learning from current limitations (e.g. diameter changes, bends) can directly inform:

    • Enhanced plug or foam designs
    • New deployment tools
    • Broader application to other service types

file format pdf download GSR_Service_Disconnection_Phase_2_PEA_NIA_CAD0164.pdf
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