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Bunded Chemical Storage Tanks

Chemical Storage Tanks with Close Proximity Integrated Bunds

A bund is ‘a ‘facility (including walls and base) built around an area where potentially polluting materials are handled, processed or stored, for the purposes of containing any unintended escape of material from that area until such time as remedial action can be taken’. As defined by Ciria, bunds must be ‘structurally independent’ from the primary containment tank. A bunded storage tank is essentially a tank within a tank, as both the storage tank and bund are fabricated independently, both comprising of their own cylinder and base. Bunded tanks provide an alternative to concrete lined bunds. A welded rainskirt prevents the ingress of water if the location is external.

Tanks being ‘double skinned’ or ‘double walled’ differ from bunded tanks as these constructions involve both ‘skins’ or ‘walls’ being welded to a single base and do not providing true secondary containment.
Today, many clients face the challenge of needing to maximise their storage capacity within the same limited site space. We can help resolve this in environments with no height restrictions by ‘building tall’ and manufacturing taller replacement tanks with close proximity bunds to sit within a minimised footprint. A recent example of this would be illustrated in our work with Christeyns who grew their capacity by 60%.

A direct benefit of reducing the tank diameters is the reduction in Civils costs by using less concrete; which also has a positive impact on an organisation’s carbon footprint.

We have the capacity to manufacture Bunded Chemical Storage Tanks in the region of 100,000l capacity. Every storage tank we design meets our customers exact requirements and conforms to the British and European standard BS EN 12573: 2000 ‘Welded static non-pressurized thermoplastic tanks’. We specialise in using thermoplastics due to their inert nature when dealing with some of the most aggressive chemicals. Specifically, we use Corrosion Resistant Polypropylene and High-Density Polyethylene (PE100-RC).

025 thermoplastic chemical storage tanks install 1
De Icer Storage Dispensing
025 thermoplastic chemical storage tanks install 1
De Icer Storage Dispensing


  • A broad range of chemical resistance
  • Corrosion resistance both internally and externally
  • The ability to specify a tank design life with unlimited fill and empty cycles
  • Lightweight tank construction leading to reduced installation costs
  • Resistance to stress cracking (PE100-RC)

Available additional features:

  • Flat, Sloping and Coned base construction
  • Heating, insulation and cladding
  • Integrated safety bunds, an alternative to lined concrete bunds
  • Rain-skirt for external siting
  • Improved access options: including ladderwork, handrails and roof strengthening
  • Recirculation systems
  • Specification
  • Material Specification
  • Chemicals Stored
  • Optional Extras
    • Our tanks range from 800mm to 4300mm in diameter


    • Capacities up to 130,000 litres


    • Wall thicknesses up to 140mm.
    • Any RAL colour can be chosen to enable the provision of chemical storage tanks to suit the surroundings or planning requirements (additional costs may apply)

Some of the many chemicals stored in Chem Resist chemical storage tanks are;rn

    • Sulphuric acid
    • Hydrochloric acid
    • Hydrofluoric acid
    • Nitric acid
    • Sodium hypochlorite
    • Sodium hydroxide
    • Ammonia solution
    • Ferric sulphate and chloride
    • Aluminium sulphate
    • Polymers
    • Salt solutions
    • Interconnecting Ductwork
    • Gas Scrubber: for Fuming Chemicals
    • ChemiGuard Tanker Offload Cabinet: Increasing Safety During Offload (Available as Pressurised and Pumped)
    • Chemical Fill Pipework
    • ChemiGuard Pump Enclosure: Providing Safe Chemical Transfer
    • Secondary Containment Bund
    • Level Instrumentation (Radar, Level Switches, Cat & Mouse)
    • Roof Access Ladders and Perimeter Handrails