Pulp and Paper Industry

Refiner bodies and end covers see severe erosion from the combination of fiber-laden flow and chemical attack. Where the wear has progressed to through-wall holes — the failure mode documented in Belzona Emergency Reclamation of a Refiner — the repair sequence is to rebuild with Belzona 1311 (Ceramic R-Metal), then top-coat with the erosion-resistant 1321 (Ceramic S-Metal). Service life on these in-situ rebuilds runs into multiple years, with the original case showing the repair still in serviceable condition after seven years and one intermediate touch-up.

Paper machine sole plates carry the cyclic load of the dryer section and degrade by a combination of corrosion, vibration, and impact. Rebuilding in-place with Belzona 1111 and the 1131 (Bearing Metal) family avoids the alternative of removing and machining the sole plate — a multi-day operation in a continuous-production environment. Rolls with surface damage are returned to round with the same 1000-series rebuild, finished by hand to specification.

Black liquor service combines aggressive chemistry with elevated temperature, and conventional general-purpose epoxies fail inside one operating cycle. The 4000-series chemical-resistant coatings (4311 Magma CR1 for ambient-temperature acid chemistry, 4341 Magma CR4 for mixed acid service with regulatory food-contact constraints) handle the bulk of the digester and evaporator service. Where temperature exceeds roughly 80°C in continuous immersion, the 1000-series ceramic coatings (1392 Ceramic HT2, 1593) take over from the 4000 series.

Hog fuel screw conveyors, scrappers, and ash handling assets see the same abrasive wear duty profile as cement and steel mill bulk-handling equipment. Belzona 1818 is the abrasion-resistant epoxy specified into this service; the trowel-grade application makes the repair viable in confined access and around live components. Re-lining intervals are scheduled into mill turnarounds, with no welding required.

One repair category specific to pulp and paper is the operator-burn hazard on uninsulated steam piping. Belzona 5871 is engineered for this duty — applied directly to the operating pipe surface, it lowers the touch-temperature without de-rating the line, brings the asset inside operator-safety guidance, and survives steam-out and washdown cycles. The repair documented in the KHIA case Belzona 5871 Protects Steam Piping Hazardous to Operators walked through a four-section batch digester at a paper mill running at 200°F maximum.

Live leak sealing on sludge piping, chemical washdown lines, and process drainage uses composite wraps from the chemical-resistant family — the same wrap chemistry used on chemical pipework, applied to the leak source under flow. The repair holds long enough to schedule the proper isolation without an emergency shutdown.

Adjacent process-heavy sectors: Chemical Industry, Water and Wastewater Industry, Power and Hydropower Industry. Asset-level deep dives: Process Vessels, Pumps, Solids Handling Machinery, Heat Exchangers, Valves, Pipes & Fittings.