Flammables - An Overview

Article Store Flammable Liquids
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June 1, 2021
 

What are flammable liquids?

Flammable liquids are liquids that can burn. They are either classified as flammable or combustible based on their flashpoints. A flashpoint is the lowest temperature at which a liquid gives off enough vapour to start burning.

Class 3.1 flammable liquids are split into four sub-classes:  

  • Class 3.1A: an example of which is petrol
  • Class 3.1B: examples include acetone (used in nail polish remover) and ethanol (used in hand sanitisers)
  • Class 3.1C: an example of which is p-xylene (used in the manufacturing of PET plastic bottles)
  • Class 3.1D: an example of which is diesel

For an overview of hazardous substances read our editorial here.

 

Where are flammable liquids most likely to be found?

Common flammable liquids are petrol, acetone, ethanol and thinners. Common workplaces where flammable liquids can be found include workshops, mechanics, and manufacturing plants.

As mentioned above, hand sanitiser is often a highly flammable substance as some hand sanitisers contain over 70% alcohol meaning it is a class 3.1b hazardous substance. If you have more than 15L on site, you will need to store it in an approved storage cabinet. For more information watch our short video here.

 

What are the risks to people and the environment?

In its broadest sense, the risk of fire is something that nearly every human being on earth is exposed to every day. This is particularly true in a business or industrial setting, when we increasingly work with flammable liquids, or substances that will liquefy in the event of a fire. The risks of flammable liquids can be high and there are certain regulations you must follow when storing flammable liquids.

Very few businesses are exempt from the risks of working with Class 3 flammable liquids. Whether you are in manufacturing, food production or warehousing, transport, agriculture or automotive repair, there is a high chance that handling and storing those substances correctly is of concern to you.

How do I store flammable liquids?

Flammable liquids cannot be stored in any old cabinet. Flammable storage cabinets serve a number of key purposes.

Heat resistant

  • They provide a heat-resistant enclosure of flammable liquids, preventing or containing the destructive effects a fire might ordinarily have, on both your staff and your business operation

Compact size

  • They are relatively compact which means a cabinet can often be situated in close proximity to where the liquids are used, creating numerous efficiencies compared to centralised storage

Secure storage

  • They can also help clean up untidy storage areas, allowing you to secure and isolate flammable liquids from those that are harmless or non-compatible – or from people that shouldn’t have access to them.
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Chemshed Flammable Cabinets are available in six sizes:

 

You can only store up to 250L in a cabinet (as long as each container is not over 20L in size). The larger Chemshed Flammable Cabinet – 350L, is available for users who may have larger sized containers that would not fit in a 250L cabinet.

Larger quantities of liquid may require a location certificate but either way, an approved storage cabinet is often the fastest and most economical way to safely and compliantly store your flammable liquids.

To read our editorial on storing flammable liquids in the workplace, click here.

 

When is a flammable liquids cabinet needed?

A flammable liquid cabinet is required when the aggregate quantity present is over the following thresholds:

  • Class 3.1A or 3.1B  = 15L

  • Class 3.1C = 100L

  • Class 3.1D = 500L

 

What are the design requirements for cabinets?

It is important to note that flammable liquids cannot be stored in any old cabinet and there are a number of requirements stated in AS 1940-2017 Standard “Storage and handing of flammable and combustible liquids.”. These requirements are outlined on page 188 of the Act, which are summarised below:

  • Each package (within) does not contain more than 20 L
  • The aggregate quantities of all packages of Class 3.1A, 3.1B or 3.1C held in the cabinet does not exceed 250 L
  • The cabinet is constructed and installed in accordance with sections 4.9.2, 4.9.5 and 4.9.7 of AS 1940-2004

AS 1940-2017 is the standard states the cabinet construction requirements and the key points are summarised as follows:

  • The walls, floor, door and roof shall be double-walled sheet steel
  • The inner base shall form a liquid-tight compound that is at least 150mm deep
  • Cabinet doors shall be self-closing, close-fitting and latched at 2 or more points
  • Any shelves shall be perforated to permit free air movement

 

Where can I put a flammable cabinet?  

Chemshed Flammable Cabinets are for indoor use, to store flammable liquids outside view our range of Outdoor Dangerous Goods Stores here.

Chemshed Flammable Cabinets should not be placed near ignition or heat sources as vapours can release and cause fires/explosions. If you have multiple flammable cabinets in one room, they must be 3m apart.

It is also a good idea to store them out of direct sunlight, or in very hot rooms.

 

Does a Flammable Cabinet need to be earthed?

A question we are frequently asked is, does my Chemshed Flammable Cabinet or Chemshed Gas Cylinder Store need to be earthed? The short answer is no – earthing is not normally required.

Earthing refers to letting electricity ‘escape’ from a cabinet if it becomes live. To do this the cabinet would need to be connected to the ground, this would protect the cabinet from electric shocks and discharges. As it is unlikely a Chemshed Flammable Cabinet would be connected to an electrical circuit (and therefore is unlikely to be ‘live’), earthing is not normally required.

Bonding is the term used when connecting metallic items not designed to carry electricity. As a storage cabinet, or cage, is unlikely to make contact with a piece of metal with another potential and thus become ‘live’ (from the difference in potential) – bonding is not normally required.

It should be noted that under regulations 10.11 10.11(2), 10.13(6), 10.17(5) and 10.19(5) of the HS Regulations, any permanently fixed containers must be earthed and bonded – above threshold quantities.

For further information please refer to the WorkSafe website.

 

Incompatible substances

Please consult the Hazero segregation chart here, for specific details. 

 

Chemshed 20-Year warranty

Storing dangerous goods is a demanding task but the strength and reliability of Chemshed cabinets, mean they are right up to it. To prove our confidence in them, they are backed up with a 20-year Warranty, which will give you the peace of mind that you are purchasing a solution that rises to the storage challenge, like none other. Find out more here.  

 

Creating safer working environments

At Hazero our mission is zero hazards. Our extensive range of quality products will help you store, contain and control and clean-up dangerous goods and hazardous substances.

View our full range of Chemshed Flammable Cabinets here.

Need help creating a safer working environment? Contact our team today on 0800 688 844 or email us at info@hazero.co.nz. Our team are also available for on-site assessments across New Zealand, click here to request a site visit.

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