Flat-bottom tanks and secondary containments made of PE-HD

Flat-bottom tanks with secondary containments made of PE-HD with helically wound Shell and Construction Certification Z-40.21-121. All thermoplastic tanks are planned, manufactured and equipped according to your individual specifications (Equipment – tank with secondary containment).

Environmentally Safe Storage Tanks for Your Hazardous Liquids

formoplast offers a wide range of flat-bottom tanks with secondary containment systems in capacities ranging from 1000 to 50,000 L, diameters from 1000 to 4000 mm and heights up to 7000 mm. Our flat-bottom tanks are available with optional walk-on working platforms and cage ladders for easy access and inspection. formoplast tanks can be supplied with electric-jacket heaters or over-the-side immersion heaters for controlled-temperature storage and/or energy-saving Polyurethane foam insulation.

Additional equipment for tanks with secondary containment

Projects – tanks with secondary containment

3 PE-HD tanks
with secondary Containment for ferric chlorid

Diameter tank: 3,400 mm
Diameter secondary containment: 3,600 mm
Height: 4,500 mm
Volume: 35 m3
Medium: FeCl3


PE-HD tank
with secondary Containment and heating/ insulation

Diameter tank: 2,800 mm
Diameter secondary containment: 3,000 mm
Height: 1,400 mm
Volume: 6 m3
Medium: FeCl3


2 PE-HD tanks
with secondary Containment for nitric acid and caustic soda

Diameter tank: 3,000 mm
Diameter secondary containment: 3,400 mm
Height: 5,000 mm
Volume: 30 m3
Medium HNO3 55%, NaOH 50%


If necessary, please use our inquiry form
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The plastic tank with greater safety

Our chemical tanks fulfil all legal requirements:


- approved under building laws
- approved under trade laws
- approved under water conservation laws
- acceptance classifications
- quality monitored by TÜV SÜD

formoplast tanks made of PE-HD are checked by the Institute of Building Technology in Berlin. Approval number: Z-40.21-121

formoplast is a specialist company approved in accordance with the German Water Conservation Act for the manufacture, installation, erection and repair of plants for the storage, filling and handling of water-polluting substances.
PDF Certificate

Highly safe storage of acids and alkalis through PE-HD technology


- Trouble-free storage, for example of 98% sulphuric acid (H2SO4), nitric acid (HNO3), sodium hypochlorite (NaOCl), acetic acid (CH3COOH), hydrochloric acid (HCl) and other aggressive acids.

- Trouble-free storage of caustic soda, caustic potash and other alkalis.

- See here for a list of further chemicals that you can store without problems in our tanks: media list

Technical data:


The table shows the standard programme for upright flat-bottom tanks.

Tanks up to 50,000 l in volume
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Large-scale tanks over 50,000 l in volume
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Flyer flat-bottom tank:

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