This DN-14a checklist guides safe, compliant PE mains jointing using electrofusion up to 355 mm. It details required tools, site setup and shelters, preparation of PE pipe, scraping and alignment, use of restraining and re-rounding clamps, generator and control unit settings, fusion and cooling times, and when to stand clear. It highlights gas safety with a 20 percent LEL threshold, cleanliness and contamination control, and separation distances. Quality checks include fusion indicators, movement, cleanliness, evidence of scraping, and printouts from the control unit, followed by assessor sign off.
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