DSEAR | Hazardous Areas, Explosive Atmospheres & Dangerous Substances

Published 12 Feb 2021

DSEAR | Hazardous Areas, Explosive Atmospheres & Dangerous Substances

DSEAR | Hazardous Areas, Explosive Atmospheres & Dangerous Substances

DSEAR Risks in Explosive Atmospheres

Dangerous Substances and Explosive Atmospheres Regulations 2002

  • Special thanks to Marc Mulligan from Projex Solutions for permission to use their DSEAR video

Dangerous substances put peoples’ safety at risk from fire, explosion and corrosion of metal. DSEAR puts duties on employers to protect people from these risks and ensure their safety in the workplace, and to members of the public who may be put at risk by work activity. The HSE usually recommends that DSEAR is updated every 3-5 years dependent upon the risk levels of the operations. Compliance with DSEAR encompasses many facets of business activity including:

  • Risk assessment of plant operations
  • Defining of any hazardous zones together
  • Installation of hazard compliant equipment
  • Preparation of explosion protection records

What are Dangerous Substances?

Dangerous substances are any substances used or present at work that could, if not properly controlled, cause harm to people because of a fire, explosion, or corrosion of metal. These substances can be found in nearly all workplaces.Explosive Atmospheres

Examples are dangerous substances include:

  • Solvents
  • Paints
  • Pressurised Gases & Substances
  • Varnishes
  • Dusts from Machining and Sanding
  • Dusts from Foodstuff
  • Flammable Gases such as Liquid Petroleum Gas (LPG)

The Dangerous Substances and Explosive Atmospheres or DSEAR are directives put in place to protect workers.

DSEAR requires an employer to:

  • Check what dangerous substances are in the workplace and the associated risks
  • Put measures in place to remove or control the risks
  • Put safeguards to protect against the effects of incidents/dangerous substances
  • Organise plans and measures to deal with accidents, incidents and emergencies
  • Ensure employees are properly trained
  • Identify and classify areas of the workplace where explosive atmospheres may occur

About ProjeX Solutions Limited

Projex Solutions

Projex Solutions was formed in 2006 and since their formation has grown to a team of highly skilled and experienced engineers of different disciplines.

They are leaders in the Chemical, FMCG, Pharmaceutical, Medical & Energy sectors, as a multi-disciplined Engineering Design & Project Management company, offering services encompassing Safety, EC&I, Process, Mechanical & Project Engineering.

Hazardous Areas DSEAR

Hazardous Area Engineering Design

  • URS/ FDS Development
  • Scope Development
  • Detailed Design
  • DSEAR Assessments
  • ATEX/ CompEx Inspections
  • HAZOP Studies
  • HAZID: Safety Review
  • HAC/ Zoning Studies
  • Front End Engineering Design (FEED)
  • LOPA, SIL/SIS Studies
  • COMAH Documentation Review
  • Electrical, Control and Instrumentation
  • Structural Design
  • Process & Safety Improvements
  • Mechanical & 3D Development
  • Factory layouts for Equipment, Machinery & Package Unit
  • Commissioning Support
  • LV Distribution Design
  • FAT/ SAT
  • Framework Agreements
  • Training – Competency & Awareness
  • EPCM Package

Further Reading: 3D Models Of Hazardous Area Zones Boundary Limits

Hazardous Area Electrical Distributors


Zone 1/2 Gas & Zone 21/22 Dust

Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.

Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.

Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, Heating, Lighting & Process Instrumentation Equipment to UK and international projects.

Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame DetectionProcess InstrumentationProcess Heating | Ventilation Fans | Security Access Control 

Hazardous Area Electrical Equipment

Competitive Prices | Extensive Stocks | Technical Support | Express Delivery

Experts In Equipment for Explosive Atmospheres & Hazardous Area Locations

Further Information | Lock | Door | Heater | Fan