Construction and assembly phases

We offer an assembly service, as well as the transport of the materials to the assembly site – unless the service is not contracted. In some projects, Tankeros only supplies the tank. In this case, assembly by us is not included.



The foundation slab is the first step when building the project. In this case, the client would be responsible for said slab, and it should be duly completed so that we can start with tank assembly.

The base is concrete. When the tank is ordered, Tankeros provides the necessary plans for the foundation slab. The slab is created in two phases to distribute the dead load. This allows for the assembly's balance (tank and concrete base) when faced with wind action and the tank is empty and it helps the assembly bear the tensions that exist at full load. For all constructions, the land must offer a minimum resistance of  1.5 Kg/cm2.

For the tank to be installed, the client will have subcontracted (or carried out by its own initiative) the necessary civil works.  The foundation must be fully clear, with no additional elements. That is to say: free of formwork, rebar, and any other materials which may interfere with assembly. The slab is to have the dimensions, leveling, space available to undertake work, etc. as needed, in accordance with the technical documentation provided by Tankeros to the client.


At this point, any problems with the base are corrected and the uniformity and strength thereof are guaranteed. The next step is to mark, on the slab, the center of the tank's diameter and, from this point (using the radius), the circumference is marked to delimit the sheet metal envelope of the tank.

After this, along with the people in charge of the construction, the location of the different connections and accessories that the tank to be assembled is equipped with is marked out (ladder, fill connection, drain connection, suction connection, overflow, manometer, manhole, etc.)



Once the previous work is done, assembly begins on the first sheet metal ferrule. The ferrule which will be at the highest position once the tank is assembled is put together first (assembly by inverse order).

The sealing phase is carried out once the tank's assembly is complete. It consists of a layer of reinforced, water-repellent concrete: 350 kg of cement per m3 of concrete. The thickness is 150 mm in the inside and 250 mm for the ring around the tank perimeter on the outside. Tanks that are lined only require a base for support.

Tipos de Tanques: Formas medidas y capacidades



Construction of the tank continues. The first step at this point would be to calculate the location of the tank on the slab and the position of the connections that lead to the tank. We then proceed to assemble the first ferrule of the tank and, once this is finished, the installation of the top cover begins.

The roof's assembly continues onwards, whether this be conical (hermetic roof which is always put on tanks for potable water or liquids which cannot be contaminated by rainwater) or a flat deck design. Along with the roof, the connections at this level are assembled as well as the fill booth, if applicable. Flat roofs are not sealed and water may drip into the interior when it rains. As the assembly of the entire tank is done from the ground, assisted by hydraulic equipment (hydraulic controller + jacks), safety during assembly is very high – scaffolding and lifting platforms are not used.

The roof is made of galvanized, pre-lacquered, ribbed sheeting, arranged horizontally with a slight gabled design to evacuate rainwater. We also have conical roofs, designed for hermetic tanks (potable water) with a slope of 8º to 15º depending on the diameter.  These roofs are built with prefabricated galvanized steel panels. The roof support is by means of inverted "L-shaped" radial galvanized steel straps.

Next, all connections are installed at the lower ferrule (drain line, vacuum line, etc.), as well as installing the manhole. Once assembly of the entire envelope has finished, the lower reinforcement profile is assembled. The reinforcement profile is attached with plates (like perforated brackets), bolted to the concrete.

When the tank has been finished and anchored, the client can undertake the second phase of concrete pouring – for tanks with mastic seals. Once this second phase is complete (or after assembly, in the case of tanks with liners), the tank can be filled and the hydrostatic test can be undertaken, if deemed necessary.

Hydrostatic testing and filling are at the client’s expense.  Tankeros will supply the client with the necessary written instructions to correctly carry out both actions.

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