The bolted tank that outlasts carbon steel by 20 years.
A 55% aluminium, 43.5% zinc barrier coating that self-heals at cuts and shrugs off Kenyan humidity. Modular panels mean we can drop a 50 to 5000 cubic metre tank on your site without on-location welding.
Carbon steel rusts. Stainless costs. Zinc-alum is the answer to both.
Bare carbon steel in Kenyan humidity reaches end-of-life in eight to twelve years. Even with paint and recoat cycles, you are looking at three full replacements over a thirty- year horizon, plus the downtime each one costs.
Stainless will outlast that timeline, but at three to four times the capital cost per cubic metre once you cross 200 cubic metres of capacity.
Zinc-alum sits in the middle. The 55% aluminium, 43.5% zinc barrier coating is a self-healing system: at any cut or scratch, the zinc sacrificially protects the steel underneath. Service life in unsheltered Kenyan conditions runs to thirty years and beyond, at a capital cost competitive with carbon steel above ~200 cubic metres.
Because the tanks are bolted from pre-coated panels, installation is faster than welded-steel equivalents and doesn't require certified site welding.
The numbers that matter on procurement.
- Panel material
- Hot-dip zinc-aluminium steel (55% Al, 43.5% Zn, 1.5% Si)
- Coating mass
- 150 to 200g/m²
- Capacity range
- 50 to 5000m³
- Diameter range
- 3 to 30m
- Panel assembly
- Bolted with EPDM gaskets, internal sealant on every seam
- Liner options
- EPDM food-grade, PVC for chemical-resistant duty
- Roof options
- Aluminium dome, conical fixed roof, or open-top
- Service life, Kenya humidity
- 30+years
- Installation footprint
- Lower than welded-steel equivalent; modular delivery
- Lead time, Kenya
- 6 to 10 weeks ex-works, plus on-site assembly
The lifecycle math, in one table.
Initial cost is rarely the right way to spec a tank. We publish this because nobody else does, and because the conversation usually closes on the second number, not the first.
- Initial cost (per m³)
- Similar to carbon steel for ≥ 200 m³, higher for small tanks
- Corrosion resistance
- Excellent in Kenyan humidity; barrier coating self-heals at cuts
- Service life (untreated)
- 30+ years vs 8 to 12 for carbon steel
- Replacement cycles, 30 yr horizon
- 1 vs 3
- Downtime saved, 30 yr horizon
- ~14 weeks of avoided reinstall labour
- Repaintable
- Not required; carbon steel needs recoat every 3 to 5 years
- Modular expansion
- Add rings to grow capacity in place
What buyers ask before specifying zinc-alum.
How long does a zinc-alum tank actually last in Kenya?
How does zinc-alum compare to carbon steel over 30 years?
How long does on-site assembly take?
Can the tank be expanded after installation?
Other tank metallurgies, and where they fit.
Stainless steel tanks
304 and 316L for food, dairy, and chemical-resistant duty where corrosion matters more than initial cost.
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ETP & water treatment
Where zinc-alum equalisation tanks earn their lifecycle math against NEMA inspection cycles.
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Cloud-ready monitoring
Inventory and level on every zinc-alum install. Safaricom NB-IoT for unattended water sites.
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