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En 14015 Vertical Flat Bottom Storage Tanks

Vertical flat-bottomed storage tanks

The EN 14015 is the European standard for designing and manufacturing vertical, cylindrical, above-ground, welded steel tanks with flat bottoms. This norm dictates tank design, manufacture, welding, inspection, and installation requirements.

The tanks are designed for the storage of liquids at ambient and higher temperatures. These tanks are designed to withstand low internal pressures and to store typical products such as crude oil, petrol, chemicals, and water.

If your installation has to satisfy the PGS 29 directive, then newly built tanks must comply with EN 14015.

Gpi has extensive experience in the production of EN 14015 tanks, varying from tanks built in the factory up to +/- 500m3 to tanks built on-location up to +/-15,000 m3.

Depending on the desired design, these tanks are equipped with a conical or doomed roof, with or without anchors and stiffening rings, such as wind girders or a top corner ring.

Naturally, these tanks can be provided with a spiral staircase, a cage ladder, or a stairway.

In terms of material, a form of duplex is often chosen. Due to this material being stronger than normal austenitic stainless steel variants, thin walls can be employed, which ensures a more rapid, higher quality, and affordable tank.

Are EN 14015 Vertical Storage Tanks suitable for storing drinking water?

Yes, EN 14015 Vertical Storage Tanks can be used to store drinking water safely.

One significant advantage of using EN 14015 vertical storage tanks for drinking water is their durability. These tanks are constructed from high-quality materials that withstand corrosion and other environmental factors. It ensures the purity of stored water over time.

Moreover, the standard includes rigorous quality control measures. These measures cover aspects such as weld integrity and structural soundness, which are crucial when the tank is intended for potable water storage.

In addition to durability and quality, EN 14015 tanks come in various sizes and configurations. This flexibility allows for customization based on specific needs, making them adaptable to different settings, from residential areas to industrial facilities.

Do you have any questions about EN14015 tanks?

Although EN 14015 is primarily meant to apply to tanks manufactured on-site, Gpi can also build tanks that conform with EN 14015 in the factory. We do this in our factories, on the water, or on the road.

When building on-location, we employ our Coil Building system. Read more about this system here, or watch our Coil Building film.

We also produce tanks according to API 650, the American equivalent of EN 14015. Read more about this here.

Product specifications

  • The European standard for above-ground flat-bottomed tanks
  • Wind/Earthquake loads included
  • Test & Inspections included
  • Up to 15,000m3


  • Conical/ Domed/Removable roof cover
  • Double bottom/Cone up/down
  • Top corner ring/Wind girders


Gpi Tanks offers vertical storage tanks with impressive delivery times. Our team works diligently to meet your needs quickly.

We manage the entire process, from initial design to final delivery. This ensures that everything moves smoothly and on time.

The cylindrical shape provides strength and stability to vertical flat bottom tanks, making them suitable for storing liquid products.

Flat-bottom vertical tanks offer efficient storage solutions for various liquids. They offer a range of advantages that make them a go-to storage solution. 

First, their design makes them easy to install. You don’t need any special support or foundations. They can be placed directly on a flat surface. This saves both time and money during the setup process.

Second, flat-bottom vertical tanks are highly stable. Their broad base provides excellent support. It reduces the risk of tipping over or collapsing.

Additionally, flat-bottom vertical tanks are space-efficient. Their vertical orientation allows for maximum storage capacity using minimal floor space.

Lastly, maintenance is straightforward. The flat bottom design makes cleaning and inspecting the tank interior easier. You can perform routine checks without needing specialized equipment.