BDF Underground Water Tanks

A BDF underground water tank is built from composite plate: a stainless steel inner layer bonded to a galvanized steel backing. The stainless face is the only surface the water ever touches, and the galvanized layer behind it carries the load, which is why an underground water tank built this way needs no lining and no internal coating. Panels are pressed at 1000 × 1000 mm, 2 to 5 mm thick, and bolted with rubber seals into a 16 mm assembled wall — no welded joint is ever in contact with the stored water.

Composite plate is tested before it becomes a panel. LVJIA records a tensile strength of 405 MPa against a 350 MPa requirement and a yield of 296 MPa against 220 MPa, with elongation at 24 per cent against a 23 per cent minimum. Those margins matter in an underground water tank because the shell is loaded from outside by soil and groundwater as well as from inside by the water it holds.

Not when it is anchored properly. Every LVJIA underground water tank uses four-core reinforcement that holds the shell down and square against the surrounding soil, and the anti-floating arrangement is verified before the tank is packed. Send the burial depth, the water table and the ground conditions with your size and the reinforcement is specified around them rather than added by habit.

An underground water tank is built to the plot rather than to a size chart, from 1 m³ up to 1,000+ m³. Because it is buried, the surface above it stays usable — a car park, a yard, a garden or a service road — which is usually the reason an underground water tank is specified in the first place. Give us the footprint you can excavate and the volume you need to hold and the panel schedule is drawn around both.

Stored water from 0 to 100 °C. In practice an LVJIA underground water tank is specified for buried fire reserve, rainwater harvesting, pump-station wet wells, irrigation and wash-down duty. Rainwater builds take a first-flush diverter and filter on the inlet. Tell us the duty and the cycling pattern with the size, because a pump station that draws the level down daily is detailed differently from a fire reserve that sits full.

Every underground water tank ships against ISO 9001:2015, certificate 07624Q0960R3S-SD/001, with ISO 14001 and ISO 45001 also on file — ISO 9001 sets out what that standard covers. CE marking is held against EN 13280:2001 under ICR/VC/HS2506113, LVJIA is an SGS verified supplier, and the galvanized layer follows the hot dip practice described in ISO 1461.

Each underground water tank is hydrostatically leak tested, filled and held before dispatch. Plate strength is tested before pressing, panel size and bolt-hole position are measured against the approved drawing, every plate batch is logged to its material record and the anti-floating reinforcement is checked before packing. The tank then ships flat, kitted with its seals and bolt sets and export packed, from the LVJIA plant in Wucheng County, Dezhou, Shandong.