DSEAR Training • Hazardous Area Classification • Explosion Safety
DSEAR / ATEX Workplace Training
Practical training in DSEAR, Hazardous Area Classification, explosion prevention and protection, static electricity and ignition-risk control for hazardous workplaces.
The course can be tailored from practical workplace requirements through to more detailed technical training for engineers, supervisors and safety professionals involved in hazardous areas, explosive atmospheres and equipment selection.
Course structure
From DSEAR Fundamentals to Practical Explosion-Risk Control
DSEAR is not only about assigning Zone 0, 1, 2, 20, 21 or 22. Effective explosion safety requires an understanding of the dangerous substance, how an explosive atmosphere may form, where it may occur, what may ignite it and what measures are required if prevention alone is not sufficient.
The training therefore combines Hazardous Area Classification with explosion fundamentals, equipment selection, static electricity and practical risk-control principles.
The technical depth can be adjusted according to the audience and the client’s processes, equipment and hazardous substances.
DSEAR Fundamentals & Hazardous Area Classification
The first part establishes the technical foundation required to understand where explosive atmospheres can occur, how hazardous areas are classified and how suitable equipment is selected for use within those areas.
The purpose of DSEAR, dangerous substances, explosive atmospheres, workplace duties and the relationship between risk assessment and hazardous area classification.
Understanding the substance data required for assessment, including flammable limits, flash point, ignition temperature and other relevant properties.
Sources of release, grades of release, ventilation, persistence and methodology for determining Zone 0, Zone 1 and Zone 2.
Combustible dust clouds, deposits and layers, release sources and classification of Zone 20, Zone 21 and Zone 22.
Understanding how process conditions, release behaviour, ventilation and geometry influence the extent of a classified area.
Introduction to the relationship between hazardous zones, ATEX equipment categories, equipment marking and suitability for the intended atmosphere.
Gas and dust require different assessment approaches
Combustible Dusts, Dust Clouds and Dust Layers
Dust hazardous area classification cannot simply be treated as gas zoning with different zone numbers. The behaviour of combustible dusts introduces additional considerations, including dust clouds, deposits, layers and the potential for accumulated material to become dispersed.
The course explains the principles used to identify dust release sources and classify areas where combustible dust atmospheres may occur.
Equipment within hazardous areas
Understanding ATEX Marking and Equipment Selection
Once an area has been classified, suitable equipment must be selected for the hazard and the zone in which it will operate. Participants are introduced to ATEX marking and how the classification of the workplace interfaces with equipment protection requirements.
The objective is not simply to recognise an Ex symbol, but to understand the information required to decide whether equipment is suitable for its intended hazardous-area application.
Part 2
Understanding Explosions: Prevention and Protection
Hazardous Area Classification is only one element of explosion safety. Participants also need to understand how explosions occur, what flammability data means in practice and the distinction between preventing an explosive event and protecting people and plant from its consequences.
Prevent or minimise the formation and release of an explosive atmosphere wherever reasonably practicable through containment, substitution, ventilation and process control.
Where an explosive atmosphere may still occur, identify and control electrical, mechanical, electrostatic, thermal and other potential ignition sources.
Where residual explosion risk remains, use appropriate protection and mitigation measures to reduce the consequences to people, plant and surrounding operations.
Measures may focus on preventing explosive atmospheres, controlling releases, providing adequate ventilation, eliminating ignition sources and maintaining conditions outside the explosive range.
Explosion protection addresses the consequences where prevention alone cannot provide sufficient assurance, including suitable containment, venting, suppression, isolation and other mitigation measures where applicable.
Static Electricity in Explosive Atmospheres
Static electricity is an important potential ignition source in many hazardous operations. The training introduces the mechanisms by which electrostatic charge is generated, accumulated and discharged, and how practical control measures can be selected.
Introduction to charge generation, accumulation, conductivity, insulation and electrostatic discharge.
Understanding the material, equipment and operating information needed when evaluating potential electrostatic ignition hazards.
Recognition of charging mechanisms associated with transfer, flow, pouring, mixing, filtration, filling and movement of materials.
Understanding when conductive equipment should be bonded and earthed and how continuity supports electrostatic control.
Assessment considerations for insulating or non-conductive containers and the additional precautions that may be needed.
Practical control measures for filling, emptying, transferring, cleaning and handling flammable liquids, powders and other charge-generating materials.
Mechanical Equipment Ignition Risk Assessment — MEIRA
Non-electrical mechanical equipment can also create effective ignition sources through mechanisms such as hot surfaces, friction, impact, overheating, bearing failure or mechanical contact.
The optional MEIRA module introduces a structured method for identifying potential ignition sources associated with mechanical equipment and assessing the measures required to control them.
The module can be particularly useful for engineers responsible for existing mechanical equipment installed within hazardous areas or equipment for which the original explosion-safety evidence is limited.
Assessing Existing Mechanical Equipment
A centrifugal pump or another relevant item of mechanical equipment can be used to demonstrate the assessment process from equipment review through to identification of potential ignition sources and practical control measures.
- Define equipment and operating conditions
- Identify potential mechanical ignition sources
- Consider normal operation and relevant failure conditions
- Review existing preventive measures
- Identify gaps and additional controls
- Document the technical assessment
Who is the training for?
Training Depth Matched to Roles and Responsibilities
The course can be tailored to the people who need to apply DSEAR and explosion-safety principles in practice rather than using the same level of detail for every attendee.
Operators & Maintenance Personnel
Practical understanding of hazardous areas, ignition sources, equipment restrictions, housekeeping, safe work practices and recognising conditions that should be reported.
Engineers & Project Teams
More detailed coverage of hazardous area classification, flammability data, equipment selection, release sources, ventilation, static electricity and explosion controls.
Safety & Compliance Professionals
Structured understanding of the DSEAR assessment process, technical justification, hazardous-area documentation and practical explosion-risk management.
Tailored to your application
The Training Can Be Built Around Your Plant and Processes
The scope can be adjusted according to the substances, equipment, hazardous areas and operations relevant to the organisation. Examples and exercises can therefore focus on gas and vapour systems, combustible dust processes, storage and transfer operations, process machinery or other site-specific hazards.
Depending on the required competence level, the training can focus on workplace application or move into more detailed Hazardous Area Classification, equipment selection, electrostatic assessment and mechanical ignition-risk assessment.
DSEAR / ATEX Workplace Training
Build Practical Competence in Hazardous Area and Explosion Safety
Discuss your DSEAR training requirements with ExConform and we can tailor the course to your hazardous substances, plant, equipment, roles and required technical depth.