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Flammable Safety Cabinet Ventilation Systems

02 Apr 2024

What are flammable safety cabinet ventilation systems?

Flammable safety cabinet ventilation systems can be installed to flammable safety cabinets to reduce a variety of the risks that flammable or combustible liquids pose in the workplace. When flammable liquids are stored in a cabinet, they can emit vapors that may accumulate within the cabinet over time.

Class 3 flammable liquids commonly found in workplaces such as fuel, oil, paint, lacquers, and varnishes. Without proper ventilation, these vapors can reach dangerous levels, increasing the risk of fire or explosion if ignited by a spark or flame. Global Spill & Safety’s range of flammable liquid safety cabinets feature two vent ports, one is located high up and the other is located lower down on the opposite side. This provides the ability to install a ventilation system such as a whirly bird to the outside air. In some cases these bungs can also be opened to reduce vapor build up inside the cabinet.


Do flammable cabinets need to be vented?


If you open your cabinet and can smell strong vapours, or if the cabinet has highly flammable liquids stored within it, you should install flammable safety cabinet ventilation systems. There are two ways this can be done:

  • A cabinet could be vented to an open space that has good ventilation e.g. a large workshop. Check with your supplier that your cabinet has spark arrestors fitted in the venting ports. Spark arrestors prevent sparks or flames accessing the cabinet once the bungs are removed. To vent a cabinet to the environment, simply unscrew both bungs with a drum spanner or similar tool.
  • If the cabinet is located in a confined space you may wish to vent to the outside atmosphere. The diagram and instructions below outline one method of how this can be achieved.


How to install a ventilation system in a flammable liquid safety cabinet:

  1. Screw nipple and reducer into vent opening at base of the cabinet
  2. Slide weight support onto reducer, ensuring weight is transferred to floor, rather than cabinet
  3. Screw elbow onto reducer
  4. Place vent pipe through roof and ceiling penetration and screw into elbow
  5. Cut off vent pipe at 1.0m minimum height above roof
  6. Rivet adaptor to vent pipe
  7.  Rivet whirlybird to adaptor
  8.  Seal roof penetration

Flammable safety cabinet ventilation system

Are There Australian Standards For Venting Flammable Safety Cabinets?

When storing or handling flammable or combustible liquids in the workplace Australian Standard AS1940-2017 – The storage and handling of flammable and combustible liquids should be followed closely. Whilst it is not a requirement of the standard to install a flammable safety cabinet ventilation system, there is still a section that provides guidance if you choose to do so:

Section 4.9.5

Where ventilation is installed, it shall be designed so that vapours are prevented from escaping into any room. Any ventilation exhaust shall be to the outside atmosphere and in a location which allows the safe dispersal of vapours and is away from any ignition sources (see Clause 4.5).

 Safe Work Australia’s in-depth pdf further details the safety regulations of flammable cabinets. Visit here


Global Spill & Safety’s range of Flammable Safety Cabinets

Our range of flammable liquid safety cabinets are manufactured in Australia for the specific storage of Class 3 flammable liquids, as outlined in Australian Standard AS1940-2017.

Vent ports with integral flash arrestors, strategically positioned on each side of the flammable liquid safety cabinets, serve as critical safety features to minimise the risk of fire or explosion.

These vent ports can be connected to flammable safety cabinet ventilation systems to facilitate the safe release of built-up vapors within the cabinet to prevent pressure buildup, which can occur due to the volatile nature of flammable liquids. The flash arrestors integrated into these vent ports act as barriers against flames, sparks, or ignition sources from entering the cabinet’s interior.

Featuring a robust double-wall construction fortified with a 40mm barrier, these cabinets offer unparalleled fire protection, safeguarding your workspace and assets.

Click here to check out our range of flammable safety cabinets

Vent on safety cabinet
Vent on safety cabinet
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