Dangerous Substances and Explosive Atmosphere Regulations

DSEAR (Dangerous Substances and Explosive Atmosphere Regulations) became part of UK law on 30th June 2003, with a transitional period until 30th June 2006. It applies to all workplaces where dangerous substances are present, used, or produced. The assessment of risk is a fundamental principle for all Health and Safety legislation, DSEAR being no exception. DSEAR requires employers to assess the risks of potential explosive atmospheres in the workplace and carry out; an ignition source assessment, hazardous area classification and zoning exercise; these risks may not be obvious to the untrained eye.

Quantative measures for the scale of potential risks and subsequent risk/severity can then be evaluated. Hazardous areas are then sub-divided into zones depending upon the type of flammable mixture/dust and the likelihood of it being present. It must then be ensured that items such as:

  • Correctly certified electrical and mechanical equipment,
  • provision and use of antistatic work clothes and earth bonding,
  • appropriate explosion protection/venting measures etc are used / purchased in the hazardous area zones identified.

Our unique understanding and in-depth knowledge of both Industrial Ventilation Systems together with Hazardous Area Classification and DSEAR Risk Assessments enables us to offer solutions to control and reduce potentially explosive atmospheres for fumes, gases and dusts and reduce extents of zones. In so doing we can possibly save our customers many thousands of pounds. In some cases, virtually whole rooms can be maintained as safe areas, eliminating the need for costly ATEX equipment. This also includes specification, design and installation of explosion protection systems, see ATEX backdraught, break, Rotary valves and screw feeders

For assurance of correct operation we also provide, backup ventilation, integrated air flow monitoring and control systems; ensuring the appropriate zoning and safe atmosphere is maintained, see Motor Starters, Control panels, automation and monitoring systems

The employer must minimise the risks to their employees due to fire and/or explosions or similar events, as far as is reasonably practicable. A potentially explosive atmosphere can develop from the release of gases, vapours, mists or dusts, which can occur in many different sectors of industry.

The ATEX ‘User’ Directive (1999/92/EC), Implemented under the DSEAR Regulations in the UK, requires employers to identify and classify areas of the workplace where explosive atmospheres may occur. They must then purchase appropriately certified equipment for use in the hazardous zones they have identified.

We carry out DSEAR Assessments in the following areas, Hampshire Berkshire Avonmouth Dorset Devon Wiltshire Somerset Oxfordshire Buckinghamshire Middlesex Northamptonshire Surrey Sussex Wales, Bedfordshire Gwent Cambridgeshire Cardiff Carmarthenshire Ceredigion Clackmannanshire Derbyshire Essex Gloucestershire Greater London Gwynedd, Hertfordshire, Isle of Wight Nottinghamshire Kent Leicestershire