Use this DN09 checklist to guide safe live gas service insertion. It covers pre-job assessment, tracing the service, barhole leakage survey, excavation and Voltstick checks, confirming suitability, and closing the ECV. Follow steps for installing a valved gland assembly, measuring and cleaning the carrier pipe, integrity testing PE pipe at 100 mbar for 5 minutes, connecting the pipe pushing machine, purging and monitoring district mains pressure, and verifying an effective seal. Includes purge stack clearances 2.5 m above excavations and 5 m downwind, end sealing, soundness testing, relaying to the property, purging, final leakage survey, and SGN-compliant sign off.
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