Digester lining and repair
Kraft digesters carry hot sulfate-rich liquor that thins linings and corrodes every weld and access port over a single campaign.
The need for digester lining and repair
BHI Coatings performs digester lining and repair across Alvin and the Texas Gulf Coast. Kraft digesters run hot sulfate-rich liquor that grinds down conventional linings and corrodes every weld and access port. One campaign can thin the shell enough to put the next run in question. When the liner finally fails, the mill is choosing between an extended outage and a welded liner replacement, and both of them stop production.
How BHI Coatings does digester lining and repair
Our crew prepares the interior and applies a ceramic-filled high-temperature immersion lining built for hot chemical service, supported by the Belzona 1391T system. Where acid attack is what drives the failure, a chemical-resistant overlay matched to the liquor goes on top. The repair cures cold, which takes the liner-replacement weld cycle and any hot work in a confined vessel off the table.
Typically applied with Belzona 1391T, Belzona 4341, matched to the service conditions.
The digester goes back to campaign under a fresh immersion barrier covering shell and welds, and the cost and downtime of a welded liner swap never land.
More Tank & Containment Lining applications
Bund walls spall from the inside out, exposing rebar and opening cold-joint cracks until the wall no longer holds its rated volume.
Learn more →Chemical storage tank liningsStored chemicals attack tank floors and the floor-to-shell weld, thinning steel where stagnant product settles and the old lining has worn through.
Learn more →Evaporator, de-aerator and autoclave liningEvaporators, de-aerators, and autoclaves run hot and wet, so conventional linings break down and the shell corrodes at welds and tube zones.
Learn more →Food and beverage hygienic liningsTanks and troughs in food and beverage plants face daily caustic wash-down and hot CIP cycles that ordinary coatings cannot pass on audit.
Learn more →Potable-water tank liningInternal corrosion in drinking-water tanks and pump components forces a choice between costly replacement and a certified recoat.
Learn more →Process vessel and drum liningsProcess vessels, knock-out drums, and clarifiers corrode at welds and access ports where the product chemistry thins the original liner.
Learn more →All 12 in Tank & Containment LiningThe whole capability in one place, with the work grouped.
See the capability →Contact BHI Coatings
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