The simplest way to think about it
- DSEAR is UK law requiring employers to assess and control risks from dangerous substances and explosive atmospheres.
- ATEX is commonly used as shorthand for two EU directives covering:
- workplace minimum requirements for explosive atmospheres (often called “ATEX 137”)
- equipment intended for explosive atmospheres (product directive)
In practice, UK sites use DSEAR to manage workplace explosion risk and use ATEX-related equipment standards and markings to select suitable kit for zoned areas.
What applies to your site?
Most of the time, the answer is: both in different ways.
- DSEAR drives your risk assessment, zoning, control measures, and safe systems
- ATEX equipment requirements drive what equipment you buy and install in zoned areas (and how it’s marked)
HSE explicitly links DSEAR zoning to the selection of equipment and protective systems.
Common confusion that causes real risk
- “We have ATEX equipment so we’re covered.”
Not unless your DSEAR assessment and zoning justify it and your controls are maintained. - “We don’t need zoning because it’s only dust.”
Combustible dust is precisely where people miss hazard formation, particularly in food and milling. - “Our consultant gave us a huge report so it must be right.”
Length is not competence. Clarity is.
What you should have on file
- DSEAR assessment (current, site-specific, action-driven)
- Zoning drawings (if zones exist)
- Equipment suitability evidence and maintenance rules
- Training and contractor controls for non-routine work
If you want, we can review your current DSEAR and tell you whether your zoning and equipment choices actually align, or whether you have hidden ignition exposure.
