This MGN Maintenance Audit for Mains Tie-In is a comprehensive checklist for gas distribution maintenance and construction crews. It covers pre-start requirements, permits, and risk assessments; traffic and excavation controls; environmental and hazardous substances management; confined space and respiratory protection; electrical safety checks for meters and equipment; asset locating using DBYD; low and medium pressure stopping-off with bagtubes and Wask 312; Williamson Short Stop procedures; polyethylene squeeze-off; flaring and purging to 100% gas in air; electrofusion, butt fusion, saddle and socket fusion practices; corrosion protection with Denso wrapping and heat shrink sleeves; spark testing; commissioning, pressure testing, leak testing, and final sign-off for auditors and crew leaders.
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