Chemical storage and dosing units

Chemical storage and dosing units must be designed as functional parts of an industrial process, not as isolated containers.

Storage volume, chemical compatibility, operating conditions, and integration with dosing systems directly affect safety, reliability, and long-term performance.
For this reason, chemical storage and dosing units must be engineered according to real service conditions, not selected only by nominal capacity.

What we mean by chemical storage and dosing units

Chemical storage and dosing units are often treated as secondary accessories.
In reality, they directly affect process stability, safety margins, and long-term operability.
At Aether, chemical storage is engineered as part of the process itself — considering chemistry, operating variability, integration with dosing systems, and real service conditions.

Operating principle

The operating principle of chemical storage and dosing units is based on safe containment of reactive or aggressive liquids while ensuring controlled and repeatable dosing.
Depending on the application, tanks and ancillary equipment must withstand:

  • static and cyclic mechanical loads
  • chemical degradation over time
  • temperature variations
  • residual reactivity or contamination

Spent solutions typically impose more severe conditions than fresh reagents and require conservative material selection and structural design.

chemical storage and dosing units

Defined operating window

Chemical storage and dosing units operate reliably only within a clearly defined operating window.

Exceeding these limits increases the risk of material degradation, deformation, leakage, and loss of containment.

  • Known chemical composition and concentration range
  • Defined storage volume and turnover rate
  • Controlled temperature and environmental conditions
  • Compatibility with filling, draining, and cleaning procedures
  • Compliance with applicable safety and design standards

Two engineering approaches

Small volume storage (≤ 1,000 Litres)

For storage volumes up to 500–1,000 litres, Aether typically adopts rotationally moulded HDPE tanks sourced from qualified industrial suppliers.


These solutions are suitable for:

  • reagent dosing systems
  • auxiliary services
  • standardised storage applications

In this range, industrial catalogue tanks offer reliable performance when correctly selected and installed.

Large volume and spent solution storage (≥ 2000 L)

For storage volumes above 2,000 litres, Aether designs and manufactures custom chemical storage tanks compliant with BS EN 12573-2.

These tanks are used for:

  • fresh chemical reagents
  • spent and exhausted solutions
  • chemically aggressive or variable liquids

Aether-built tanks are manufactured in black HDPE and cover storage capacities up to 25,000–30,000 litres, depending on service conditions.

Key design considerations

Neglecting chemical storage and dosing design often results in systems that perform adequately during commissioning but degrade rapidly in real operation.

  • Chemical compatibility over the full service life
  • Structural loads and installation constraints
  • Venting and pressure management
  • Access for inspection, cleaning, and maintenance
  • Integration with dosing and waste handling systems
storage volumes exceed standard catalogue limits
chemicals are aggressive, reactive, or variable over time
spent solutions must be safely contained
regulatory compliance requires certified design standards

When engineered chemical storage is required

In these cases, chemical storage must be treated as part of the process design, not as a generic accessory.

DESIGN ACCORDING TO BS EN 12573-2

Welded thermoplastic tanks exceeding catalogue limits cannot be engineered without defined service conditions.
This is a proposed questionnaire on conditions of service for a welded static non-pressurized thermpolastic tank.

Please fill in your limiting dimensions if any.
Please fill in your tank capacity request
The required design life of a tank is the period of time which is used in the determination of the tank dimensions (e.g. wall thickness) and allowable stresses. It is not the period of warranty. ANY WARRANTY NEEDS TO BE AGREED BETWEEN THE CUSTOMER AND AETHER INDUSTRIAL SRL.
to be experienced during initial proposed service (please state)
expected during working cycle
state where the tank will be installed
Please, insert the content density. If the nature of the intended contents of the tanks changes, then it is recommended that the user seeks advice from the manufacturer or other appropriate authorities.
Please, list the expected constituens. If the nature of the intended contents of the tanks changes, then it is recommended that the user seeks advice from the manufacturer or other appropriate authorities.
Please, list the solvents expected or leave the text area blanc if the tank won’t contain solvents. If the nature of the intended contents of the tanks changes, then it is recommended that the user seeks advice from the manufacturer or other appropriate authorities.
Please, list the detergents expected or leave the text area blanc if the tank won’t contain detergents. If the nature of the intended contents of the tanks changes, then it is recommended that the user seeks advice from the manufacturer or other appropriate authorities.
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