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DSEAR Assessments

Dangerous Substances and Explosive Atmosphere Regulations 2002 (DSEAR) We have over 16 years’ experience of completing DSEAR assessments in a diverse range of workplace environments. All five of our DSEAR consultants are qualified with SGS BASEEFA and have many years individual experience in completing assessments of industrial processes.

DSEAR compliments the Control of Substances Hazardous to Health Regulations 2002 (COSHH) as it’s concerned with the assessment and control of physical risks, whereas COSHH focuses on health risks. Quite often processes will involve the use or storage of hazardous substances which are not only harmful to health, but also create potentially explosive atmospheres and we can also offer an integrated approach to assessing both (with a potential cost saving to you), since many of our DSEAR experts are also qualified occupational hygienists with chemical industry expertise. We also make sure that the noise and air monitoring equipment we use for hygiene work is ATEX/IEC rated for use in potentially explosive atmospheres.

Dsear Zones

DSEAR has two important components to get to grips with. The Dangerous Substances part usually requires the recognition and control of substances which can cause a hazardous reaction or other physical event, and often involves scrutiny of the chemical & physical properties of substances followed by an evaluation of segregation practices, chemical mixing methods, temperature controls and storage conditions where relevant.

The Explosive Atmosphere part of DSEAR involves a careful examination of any situation where dusts, mists, vapours and gases can mix with air to form a potentially explosive atmosphere. Once these have been identified and their extent defined through a process known as Hazardous Area Classification (referred to as Classification of Hazardous Places in DSEAR and described as Zones), it is then necessary to look at electrical and non-electrical equipment within these zones and whether this equipment is adequately protected to avoid ignition. The assessment of explosive atmosphere risks in a multi-process environment often requires very careful consideration of risk factors and controls.

The following is an example of the kind of industrial installations and the processes we regularly assess:

Type Of EnvironmentType of DS or EA
Warehousing of aerosolsButane gas propellant release
Plastics granulationExplosive dust release
Polyurethane mouldingIsocyanate hazardous reaction
GRP MouldingSolvent vapour releases
Storage & dispensing of LPGPropane gas release
Storage & dispensing of petrolPetrol vapour release
Paint storage, mixing and sprayingSolvent vapour releases
Wood and MDF machiningWood and MDF machining
PrintingFlammable vapour releases
Aerospace machining of carbon fibresExplosive dust release
Titanium, steel & aluminium foundriesMolten metal hazardous reaction
Aluminium grinding and sandingExplosive dust release
Alcoholic drinks manufactureEthanol vapour release
Covid-19 hand sanitiser storageEthanol/isopropanol vapour release
Food mixing (human and animal feed)Explosive dust releases
Electroplating & surface finishingHazardous reactions (various) & hydrogen release
Pharmaceutical manufactureExplosive dust release
Battery chargingHydrogen gas release
Effluent treatmentUse of corrosive water treatment chemicals
Industrial gasses storage and usePressurised gas release & segregation/danger class
LaboratoriesFlammable solvents and hazardous reactions
Heat treatmentEndo gas generation
Celluloid film storage & screening of filmDegeneration hazardous reaction

All our DSEAR assessments are carried out in line with DSEAR Regulation 5, Schedule 1 of the Regulatory Reform (Fire Safety) Order 2005 and DSEAR ACoP L138.