Papermill Maintenance

Pulp and paper mills operate continuous processes where scheduled shutdowns — "paper machine downtime" — must be used with maximum efficiency and unplanned failures carry enormous production cost. MAC Industrial Services has direct experience maintaining the specialized equipment of the pulp and paper process: kraft recovery boilers, chemical recovery smelt systems, multi-effect evaporators, digesters, lime kilns, bleach plant equipment, and the paper machine itself.

Recovery boiler maintenance is perhaps the most safety-critical discipline in the papermill environment. A recovery boiler explosion caused by water contact with smelt is among the most dangerous industrial accidents possible. MAC's crews are trained in the specific hazards of black liquor-fired recovery boiler work, including the lockout, draining, and purging procedures required before entry, and the tube inspection and replacement techniques used on the furnace walls, superheaters, and generating bank.

Beyond recovery boilers, MAC provides maintenance services across the entire mill — from digester pressure vessel repairs and evaporator tube bundle cleaning and replacement, to paper machine press roll and dryer section mechanical maintenance, and piping and structural work throughout. Our teams work within the compressed shutdown windows typical of paper mills, with the craft depth to run multiple concurrent work packages efficiently.