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Tanks and stationary container systems

What are stationary container systems?

A stationary container system is a fixed tank or a process container and its associated pipe works and fittings. The requirements for a stationary tank are more specific than for a process container.  

Stationary container systems can hold flammable, oxidising, toxic, corrosive and ecotoxic substances.

Stationary tanks

A stationary tank is used for storing or supplying hazardous substances; and is normally located at a specific place. It includes:

  • all parts and materials (for example, coatings) that help to maintain the structure and integrity of the tank
  • any means of closing the tank (for example, a lid or fitted cover)
  • any component of the tank intended to protect the contents of the tank from harm (for example, lightning protection) and
  • any other component that is an integral part of the tank (for example, a liquid height indicator, heating coil, or internal valve).

A stationary tank does not include packaging, intermediate bulk containers (IBC), portable tanks and mulitiple-element gas containers or compressed gas cylinders. 

Process containers

A process container is a stationary container that contains a hazardous substance in the course of manufacture or use, for example, a mixing container, reaction vessel, distillation column, drier, or dip tank.


For further information on stationary container systems, see:

Information Sheet on Stationary Container and Secondary Containment Systems (pdf, 109 kb)


Stationary container approval

Stationary tanks and process containers must meet certain safety requirements and may need to be certified.

Disused below-ground tanks

A below-ground tank that no longer stores hazardous substances must be removed, or needs approval to remain below ground.

Secondary containment

Secondary containment ensures that liquid substances can be contained if they escape from the container in which they are stored.

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