Acid Pump Casing Erosion Rebuild
Eroded acid pump casing rebuilt cold and lined with a chemical- and erosion-resistant system to restore clearances.
A job completed with Belzona. This describes what the Belzona system does and how it goes on, not a record of a specific project by this distributor.
The challenge
An acid transfer pump moves a corrosive, erosive fluid that attacks the casing from two directions at once. The acid chemically eats the metal while the flow scours it, so the casing thins fastest along the volute and the flow path. As that metal is lost, the internal running clearances open up and the wetted surface roughens, and the pump moves less fluid for the same input. Left unchecked, the wall keeps thinning toward a breach of an acid-wetted component, and the unit gets pulled from service. The usual answer is a replacement casting, which is costly and often on a long lead time.
The Belzona approach
The pump goes into the shop for assessment of where the acid and the flow have taken the metal. The casing and the flow path are blasted back to clean, profiled substrate so the repair bonds to bare steel. Belzona 1000 Series composites rebuild the thinned and eroded sections cold, working without heat so the casing sees no distortion. The internal profile is then reformed back to the original running clearances and the flow path lined with a chemical- and erosion-resistant system keyed to the acid. The result is a smooth wetted surface and tight clearances, ready to go back into service.
- Assess and mapInspection of the casing and volute maps where the acid and the flow have thinned the metal and confirms the fluid so the lining is keyed correctly.
- Surface preparationGrit-blasting takes the casing and flow path back to a clean, profiled substrate so both the composite and the lining bond to bare steel.
- Cold metal rebuildBelzona 1000 Series composites rebuild the lost and eroded metal, applied cold so the casing sees no heat distortion.
- Reform and lineThe internal profile is reformed back to the original running clearances and the flow path lined with a chemical- and erosion-resistant system matched to the acid.
- Return to serviceThe wetted surfaces are finished smooth, cure is confirmed, and the rebuilt pump returns to service.
The result
- Lost metal rebuilt cold and clearances restored without a replacement casting
- Flow path lined with a chemical- and erosion-resistant system keyed to the acid
- Worn casing saved rather than scrapped, avoiding a new casting lead time
- Work completed by factory-trained and factory-certified Belzona applicators
In the field
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Belzona Houston is the authorized Belzona distributor for South Texas and the Gulf, based in Alvin, Texas, we’ll survey your equipment and recommend the right cold-applied Belzona system, with 24-hour support.