The BDF composite water tank in its plainest form — stainless to the water, galvanised steel to the load, bolted on site.
Indicative — the quotation confirms the final figure US$3,600 Lead time 15 – 25 days · ex Dezhou, Shandong
SKU LVJ-BDF-GSC
What buyers said once the tank was on site — every review left on our Alibaba store, in their own words.
The BDF composite water tank from LVJIA is a bolted, buried storage tank pressed from bimetallic composite plate at our own plant in Dezhou, Shandong. This is the standard LVJIA buried tank sold on what it actually is: a bimetallic panel, pressed and drawn in one stroke.
A BDF composite water tank is a sectional tank assembled below ground from 1000 × 1000 mm pressed panels. Each panel is drawn in a single press stroke from a composite plate: a food-grade stainless layer on the face that meets the water, hot-dip galvanised steel behind it to carry the load. The panels bolt together inside the excavation, so no welding happens on site and no welded seam is ever in contact with the stored water. LVJIA builds this tank from 1 to 1,000+ m³, which means the volume follows the pit you have dug rather than a fixed catalogue size.
Stainless steel is what you want against stored water and what almost nobody can afford to build an entire tank from. Galvanised steel is stiff, strong and cheap, and is exactly what you do not want the water touching. Bonding the two and pressing them together gives each metal the job it is good at, at a delivered price much closer to galvanised than to solid stainless. The press stroke matters as much as the metallurgy: a drawn panel has no welded seam on the wetted face, which is where grain structure changes and where pitting starts first in any steel tank.
Three things separate this BDF composite water tank from a coated steel tank. First, there is no coating: the corrosion-resistant surface is the stainless face of the panel itself, so there is nothing to blister, peel or repaint. Second, the panel is drawn rather than fabricated, so the water never touches a heat-affected zone where pitting normally starts. Third, every joint is closed with EPDM strip and stainless fasteners outside the water path, which means a single panel can be replaced years later without cutting the tank open. The module is reinforced on all four corners, and the wall is carried on a 16 mm section rated for a full 4.5 m of head.
| Model number | Buried water tank |
|---|---|
| Capacity | 1 – 1,000+ m³ built to order |
| Material | New stainless steel composite plate (BDF) |
| Panel forming | One-stroke press and draw |
| Backing | Hot-dip galvanised steel |
| Panel module | 1000 × 1000 mm |
| Panel thickness | 2 – 5 mm by height |
| Wall thickness | 16 mm |
| Fasteners | Stainless bolts, EPDM gasket strip |
| Water temperature | 0 – 100 °C |
| Certification | ISO 9001 · CE |
| Origin | Dezhou City, Shandong Province, China |
The same panel system covers the whole range, which is why one drawing office can quote 4 × 2 × 2 m for a house and 20 × 10 × 5 m for a municipal reservoir without changing the parts list. Panels arrive flat on wooden pallets and are carried by hand, so a tank can go down a stairwell and through a doorway that a welded vessel never would.
| Tank height | Panel thickness | Typical use |
|---|---|---|
| 1.0 – 1.5 m | 2 mm | Shallow buried reserve |
| 2.0 m | 3 mm | Standard buried tank |
| 3.0 m | 4 mm | Deep reserve, high head |
| 4.0 – 4.5 m | 5 mm | Maximum depth, pump station |
Every BDF composite water tank is filled and held at full head for 48 hours before it leaves the factory, and no joint is allowed to weep. The composite plate carries drinking-water contact report SP2630499 from the Dezhou Institute of Product Quality Standards and Metrology, and the plant holds ISO 9001 with CE marking on the product. Copies of the report and the certificate ship with the order, and you can see the full set on our certifications page. The same specification is published on our Made-in-China storefront, where LVJIA is an audited supplier.
Pricing for the BDF composite water tank starts at US$200 per cubic metre, falling to US$180 from 10 m³ and US$150 from 50 m³, FOB Tianjin or Qingdao. The minimum order is one set. Samples ship in 3 to 5 days and batch orders in 15 to 25 days from Dezhou, Shandong, on wooden pallets. HS code 7310100090. Samples ship in 3 to 5 days. LVJIA has been a Diamond Member and audited supplier on Made-in-China since 2025, with Fortune 500 collaborations on record.
Send the pit dimensions and the volume you need and LVJIA returns an arrangement drawing and a panel schedule before you commit to anything. If you would rather talk it through first, our engineers answer specification questions directly through technical help, and the rest of the range sits on the BDF underground water tank page.
If the material has to change, the sealed galvanized water tank is the same tank in hot-dip galvanized steel, for sites where a heavier steel wall suits the head, while the stainless steel 316 water tank builds it in stainless steel. Elsewhere in the BDF underground range there is the BDF fire water tank for fire reserves and the food grade BDF tank for drinking water.
At a glance
Every tank is built to the pit you have. The module is a 1000 × 1000 mm pressed panel, so capacity steps in whole cubic metres and the arrangement can be long and shallow or short and deep without changing the parts list.
Panel thickness by tank height — Galvanized Stainless Composite BDF Water Tank
| Tank height | Panel thickness | Typical use |
|---|---|---|
| 1.0 – 1.5 m | 2 mm | Shallow buried reserve |
| 2.0 m | 3 mm | Standard buried tank |
| 3.0 m | 4 mm | Deep reserve, high head |
| 4.0 – 4.5 m | 5 mm | Maximum depth, pump station |
Shandong Lvjia has pressed water-tank panels in Dezhou since the plant opened, and holds ISO 9001 with import and export rights of its own.
Request a quoteThe panel is a bimetallic composite: a food-grade stainless layer bonded to hot-dip galvanised steel, then pressed and drawn in a single stroke. The stainless face carries the water; the galvanised layer carries the load.
Product dimensions
Tolerance requirements
Every tank is filled and held at full head before it leaves Dezhou, and the composite plate carries a drinking-water contact report from the Dezhou Institute of Product Quality Standards and Metrology.
Typical performance — Galvanized Stainless Composite BDF Water Tank
| Test | Method | Result |
|---|---|---|
| Hydrostatic | 48 h at full head | No weep at any joint |
| Drinking-water contact | Report SP2630499 | Pass |
| Shock resistance | Four-corner reinforced module | Pass |
Send the pit dimensions and the volume you need and LVJIA returns an arrangement drawing with the panel schedule before you order.
Talk to an engineerHow every tank is specified, built to your drawing, inspected and documented before it leaves the line.
We’ll help you meet your specification.
Send us a drawing or a capacity and we will come back with a specification, a price and a build slot.
Get in touchTanks our customers pair with this one. Hover or tap a card for its specification.
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Hỏi về sản phẩm này
Tell us the capacity and the space you have. An engineer replies with a drawing and a firm price.
Trao đổi với kinh doanh và kỹ thuật
Straight to the engineers who press the panels. First reply usually under two hours on a working day.
Shandong Lvjia Air Conditioning Equipment Co., Ltd. · Dezhou, China
