This DN-07 service laying checklist guides operatives through safe electrofusion of gas service pipes. It covers verifying pipe and fitting size and SDR, heating and cooling times, choosing a flat dry work area, using shelter for wind chill, keeping fittings clean in protective bags, scraping and cleaning joint areas, voltage and generator checks, use of restraining and re rounding clamps, penetration depth marking and alignment, fusion setup and timing, standing clear during fusion, controlled cooling, visual indicator checks, and optional data capture of results. The checklist references the lower explosive limit threshold at twenty percent LEL for equipment placement.
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