DSEAR is the United Kingdom’s implementation of the European Union-wide ATEX directive. The intention of the Regulation is to reduce the risk of a fatality or . There is a lot of confusion about whether it’s necessary to adhere to the DSEAR Regulations. Here we provide some insights into the regulations so that you can . This is the original version (as it was originally made). This item of legislation is currently only available in its original format. Collapse all -. Introductory Text.

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The HSE website provides an excellent starting point for any business to help identify in detail what all businesses need to know. The HSE identifies that dangerous substances are any substances used or present at work that could, if not properly controlled, cause harm to people as a result of a fire or explosion. In practical terms they can be found in nearly all workplaces and include such things as solvents, flammable paints, varnishes, flammable gases such as LPG and Acetyleneand dusts that can be created eegulations a by-product e.

As a business ddear first need to know what substances in your workplace have the potential to present fire and explosion risk. We find that too many businesses fail to understand this and are therefore putting their employees and business at risk. Another problem is that businesses fail to consider all of their processes; as many DSEAR risks are often associated to maintenance and cleaning.

Therefore it is imperative that your business considers what controls would be needed for these activities. For example, are Permits to Work required? Because of the nature of hazardous substances it is regukations imperative to consider what would happen if something was to go wrong and to have in place emergency planning. Another important action is to make sure employees are properly informed about rwgulations trained to control or deal with the risks from the dangerous substances.

The Dangerous Substances and Explosive Atmospheres Regulations 2002

A fundamental requirement of DSEAR is to identify and classify areas of the workplace where explosive atmospheres may occur. Where explosive atmospheres may occur these must be classified into hazardous zones based on the risk of an explosion occurring, and protected from sources of ignition by selecting suitable equipment and protective systems.


Explosive atmospheres regulation be caused by flammable gases, mists or vapours or by combustible dusts. If there is enough of the substance, mixed with air, then dseag it needs is a source of ignition to cause an explosion.

Explosions can cause loss of life and serious injuries as well as significant damage.

Preventing releases of dangerous substances, which can create explosive atmospheres, and preventing sources of ignition, are two widely used ways of reducing the dsrar. Using the correct equipment can help greatly in this. Many workplaces may contain, or have activities that produce, explosive or potentially explosive atmospheres. Examples include places where work activities create or release flammable gases or vapours, such as vehicle paint spraying, or in workplaces that undertake welding; or where handling fine organic dusts such as grain, flour or wood.

DSEAR requires employers to eliminate or control the risks from dangerous substances — further information on regilations requirements can be found at http: In addition to the general requirements, the regulations place the following specific duties on employers with workplaces where explosive atmospheres may occur ….

Employers must classify into zones areas where hazardous explosive atmospheres may occur.

The classification given to a particular zone, and its size and location, depends on the likelihood of an explosive atmosphere occurring and its persistence if it does. It is important to understand these requirements fully, as failure could lead to:.

By accessing the BSI standards you can find detailed information and guidance on gegulations classification and zoning of areas where potentially explosive atmospheres may occur and the selection of equipment for use in those areas. Areas classified into zones must be protected from sources of ignition.

DSEAR Regulations

Equipment and protective systems intended to be used in zoned areas should be selected to meet the requirements of the Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres Regulations Equipment already in use before July can continue to be used indefinitely provided a risk assessment shows it is safe to do so.


Static is a potential source of ignition that is often not properly considered; we have helped a some businesses who, to their cost, had not recognised the risks and unfortunately found out the hard way. Making sure that you have suitable earthing controls can help prevent fires and explosions. Additionally, providing anti-static clothing may be necessary — depending upon the regularions of risk identified in the risk assessment. Employees may need to be provided with suitable clothing and footwear if working in zoned areas.

Before a regulztions containing zoned areas comes into operation for the first time, the employer must ensure that the overall explosion safety ddear are confirmed verified as being safe.

The Dangerous Substances and Explosive Atmospheres Regulations – Fire and explosion

This must be done by a person or organisation competent to consider the particular risks in the workplace, and the adequacy of the explosion control and other measures put regulatiojs place.

It may be possible in some instances to do this from within your organisation but a word of caution; think very carefully about whether you have the necessary competence in your business. So what is ATEX and explosive atmospheres?

What does your business need to do? It is important to understand these requirements fully, as failure could lead to: An area going unclassified and leading to ignition of a flammable atmosphere; or Over rating of a hazardous zone; this can make operating in such zones very expensive and sometimes incurring unnecessary expenditure.

Selection of equipment and protective systems Areas classified into zones must be protected from sources of ignition. Confirming verifying overall explosion safety Before a workplace containing zoned areas comes into operation for the first time, the employer must ensure that the overall explosion safety measures are confirmed verified as being safe.