Explosive Atmosphere Design, Installation and Verification Services:


The CompEx Scheme is now the global solcompexlogotopution for validating core competency of employees and contract staff of major users in the gas, oil & chemical sectors, both with offshore and onshore activities.


Based upon the IEC Standards, primarily IEC 60079: Parts 10; 14 & 17, Competency Validation and Certification for electrotechnical and mechanical craftspersons and Application Design Engineers working in explosive atmospheres is available in over 12 modules (see Course Units) and the CompEx Certification Body, JTLimited is accredited to IEC / ISO 17024 :2003 – Competency of Persons who work in explosive atmospheres.



Explosive atmospheres occur in onshore and offshore petrochemical plants and refining plants. They are also found in distilleries, paint spraying plants, flourmills, woodworking machine plants, chipboard and MDF pre-production areas, the water industry and all fuel forecourt environments. Failure to ensure safe working practices in these circumstances could result in the ignition of explosive gases or dust clouds leading to injury or even fatalities and the destruction of capital asset investments damaged by explosive blasts and fire.


DSEAR and ATEX are abbreviations for The Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR) and Explosive Atmospheres Directives 99/92/EC (ATEX 137) and 94/9/EC (ATEX 95) which are enforced by the HSE and Local Authorities, Fire Brigades and Petroleum Licensing Authorities. Employers engaged with work in hazardous areas send their employees for CompEx Core Competency Certificate Validation to ensure that the operatives are both trained and practically assessed to measure their core competence to operate safely in these hazardous areas.

Competency is only certificated only to individuals who:

  • Meet the necessary entry criteria to register for the selected CompEx modules (see below)
  • Pass the underpinning knowledge theory examinations
  • Pass the competency validation tests in the form of practical assessments on equipment utilised in explosive atmospheres



Competency can only be determined by having the underpinning knowledge in place and the ability to apply that knowledge to safely install, inspect and maintain equipment unique to explosive atmospheres. The portfolio of practical assessments and the end-test theory examination ensure this with all CompEx modules.