Steel carries the load, liner seals the water
At large diameters the bolted steel wall takes the full hydrostatic load — no bulging, no reliance on tarpaulin self-support.
Galvanized sheet tank
Steel strength, liner tightness — a galvanized corrugated-steel sheet tank with a bolt-together wall and a food-grade PVC / TPU inner liner: rigid hot-dip galvanized panels carry the water load while a welded liner keeps it leak-proof, giving a large, durable, semi-permanent culture pond that still ships flat and assembles on site.
- WallHot-dip galvanized corrugated steel
- LinerFood-grade PVC / TPU, replaceable
- SizesØ2.4–30 m · ~5–1,060 m³
- BuildBolt-together · ships flat
ISO 9001 CE OEM / ODM
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
Product Description
Healthy and safe PVC material, non-toxic and tasteless, and no pollution to the storage medium. 2. Abrasion resistance, tear
resistance, low-temperature resistance, aging resistance, UV resistance, oil resistance, and non-corrosion. 3. Large size, lightweight, and low shipping cost. 4. Easy to operate and easy to carry. 5. Flexible folding and easy packaging. 6. Strong environmental applicability, economic and environmental protection. 7. High-frequency welding.
Advantage:
1. Filling air testing 100% before packing.
2. Professional function testing for every process.
3. Supply 24 months product warranty
after you get the product.
Video of Product
Application
Specifications
Models & configuration
Indicative sizes integrated from the standard round range — diameter, height, sheet gauge, galvanizing weight and liner grade are confirmed per order.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-GST-2 | ~5 m³ (Ø2.4 × 1.2 m) | Small grow-out / holding | PVC tarpaulin liner |
| SIGMA-GST-3 | ~12 m³ (Ø3.6 × 1.2 m) | Standard biofloc tank | PVC / TPU liner |
| SIGMA-GST-5 | ~25 m³ (Ø5.0 × 1.3 m) | Large-diameter grow-out | PVC / TPU liner |
| SIGMA-GST-8 | ~65 m³ (Ø8.0 × 1.3 m) | Commercial grow-out | TPU liner |
| SIGMA-GST-10 | ~100 m³ (Ø10 × 1.3 m) | Commercial grow-out | TPU liner |
| SIGMA-GST-15 | ~230 m³ (Ø15 × 1.3 m) | Large commercial grow-out | TPU liner |
| SIGMA-GST-20 | ~470 m³ (Ø20 × 1.5 m) | Large grow-out / reservoir | TPU liner |
| SIGMA-GST-25 | ~735 m³ (Ø25 × 1.5 m) | Reservoir / grow-out | TPU liner |
| SIGMA-GST-30 | ~1,060 m³ (Ø30 × 1.5 m) | Largest single tank / reservoir | TPU liner |
| SIGMA-GST-R | Per order (L × W × H) | Custom rectangular | PVC / TPU liner |
| Wall material | Hot-dip galvanized corrugated steel panels, bolt-together assembly |
|---|---|
| Inner liner | Food-grade PVC tarpaulin / TPU membrane — welded, independently replaceable |
| Shapes | Round (main) / rectangular |
| Galvanizing weight | Selected per site — heavier zinc coating for coastal / high-humidity locations |
| Fittings | Reinforced top rail, ground sheet / underlay, bottom drain, overflow, ladder |
| Species | Tilapia, catfish, shrimp and biofloc culture |
| Working conditions | Large-diameter commercial grow-out, biofloc and farm reservoirs — no concrete, relocatable |
System composition
Hot-dip galvanized corrosion resistance
Long outdoor service life; heavier zinc coating available for coastal and high-humidity sites.
Ships flat, assembles on site
Bolt-together panels need no concrete or excavation, and the tank can be dismantled and relocated.
Independently replaceable liner
Keep the steel frame and swap only the inner membrane — low long-term cost.
Big single-tank volume
One tank holds from tens up to ~1,000 tonnes of water, replacing multiple small tarpaulin units.
Fully customizable
Diameter, wall height, sheet gauge, galvanizing weight and liner grade made to order.
Application
- Large-diameter commercial grow-out of tilapia, catfish and shrimp
- Large biofloc culture tanks
- Farm water storage, conditioning and holding ponds
- Mid-to-large relocatable projects on rented land
- Fast tank construction where concrete is impractical or water is scarce
Video
Galvanized sheet tank
FAQ
Frequently asked questions
How is a galvanized sheet tank built?
Hot-dip galvanized corrugated steel panels are bolted into a rigid wall that carries the full water load, while a food-grade PVC / TPU inner liner keeps it watertight — it ships flat and assembles on site without concrete or excavation.
Why choose a galvanized steel tank over tarpaulin?
The steel wall takes the hydrostatic load instead of relying on the tarpaulin to self-support, so it stays stable at large diameters; one large tank can replace many small tarpaulin units.
Can the liner be replaced separately?
Yes — the liner is replaceable independently of the steel frame, so the galvanized wall stays in use and only the inner membrane is swapped, lowering long-term cost.
What is a galvanized sheet tank used for?
It is widely used for tilapia, catfish and shrimp grow-out, biofloc and farm reservoirs, especially where a relocatable, semi-permanent large tank is preferred.
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