Rectangular Polyester Tanks

Rectangular GRP tanks

Rectangular GRP tanks

When available space limits the use of cylindrical tanks, rectangular tanks can be the solution. We manufacture each tank to size for each client and specification. Made with an external metal support structure, the interior is all GRP. In the case of harsh or saline environments, the structure can be completely covered with polyester, avoiding corrosion.

As with the rest of the range of Trepovi tanks, they are designed and manufactured according to specifications regarding the product to be contained, the temperature, wind or seismic conditions, etc. The resin and fibre are chosen to optimise value for money and to guarantee their durability and compatibility with different chemical storage regulations.


  • Design according to UNE 13121 or others such as ASME, API, etc.

  • External coating of the structure with GRP or with polyurethane paint

  • Resin and fibre according to specifications (pH, temperature, product)

  • Dimensions to size

  • GRP flanged connections

  • Vents tailored to tank

  • Manholes of all types: round, rectangular, with airtight or folding lid

  • Attachment according to wind or seismic specifications

  • Lifting lugs

  • Colours can be chosen by clients (RAL chart)

  • Polyurethane exterior paint (UV resistant)

  • All kinds of accessories: sensors (level, temperature, etc.), alarms, electrical control panel, cleaning balls, etc.

  • Structural, seismic and wind calculations

  • For underground or overground installation

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