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Ex Theory on Hazardous Area Equipment focussed on Rotating Machinery

To complete the course in hazardous area equipment repair, overhaul and reclamation, it is recommended that both Ex Theory and Ex Hands-on are taken.


The Ex Theory is a two day course that focuses on the theory behind Ex equipment. The ExHands-on two day course gives hands-on practical experience. After completing the assessments on module 2 the course is completed.


A refresher is required after 3 years in order to keep up to date with current standards and legislation. 

Course content includes: 

  • Ignition sources in flammable gases, vapours and dusts

  • Principles of Ex protection for gas and dust

  • Temperature classification and groups of apparatus

  • Certification, standards and marking

  • Requirements and procedures of ATEX, DSEAR and relevant standards such as BS EN IEC 60079-19

  • Principles of protection concepts of:

  • Ex d (Flameproof)​

  • Ex e (Increased Safety)

  • Ex nA (Incendive sparking)

  • Ex tD (Dust)

  • Other methods such as Ex p, Ex o, Ex i, Ex m, Ex q, Ex s, etc.

  • Mechanical protection concepts:

  • Ex h incorporating  "c" constructional safety, "k" liquid immersion

  • Q & A Sessions throughout the course

  • Assessment

The course programmes rely upon the full involvement of the delegates in discussions and exercises.


Our online courses (when available) cover all aspects of the classroom based course, without the travel expense!  Courses are provided over Zoom, with full interaction with the trainer. Assessments are taken one-on-one with coaching from the trainer on any areas the delegate is struggling. 


All delegates are assessed throughout the course, with multiple choice questions, and an AEMT Certificate of Assessment issued to all successful delegates.

Course, Length, and Times

The whole course for module's one and two are four days in total starting each day at 8.30am to 4.30pm. Both courses span just two days individually.

Ex Theory Course Fees 2023

The rates are quoted in GBP and does not include travel and accommodation costs. Rates include refreshments and lunch where appropriate.

UK-based Classroom and Trainer-led Online Courses (Prices are per delegate and are subject to VAT)

  • £605.00 for AEMT Members

  • £725.00 for Non-Members

International Classroom Courses (Prices are per delegate)


  • £820.00 for AEMT Members

  • £985.00 for Non-Members

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