Ex Theory Only

Ex Theory Only

We specialise on Units Ex 005 of the IECEx Recognised Training Provider Programme (RTPP). This focuses on the IEC BS EN 60079-19 standard on repair, overhaul and reclamation of Ex equipment.

The aims of the course are to give delegates a thorough knowledge of how the different protection concepts and standards should be used when overhauling, repairing, or reclaiming Ex equipment suitable for each zoned area.

The Ex Theory is a two-day course that focuses on the theory behind Ex equipment. The Ex Hands-on two-day course gives hands-on practical experience. After completing the assessments for both modules, the full course is completed.

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


Course content for the Ex Theory & Hands-on 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​, Ex e, Ex nA, Ex tD

  • 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

  • Initial inspection and measurement

  • Overhaul and Recovery

  • Testing

  • Health and Safety aspects including “Certificates of Safety” relating to the actual equipment being received.

  • Best Workshop Practice: including the procedures that should be in place to repair Ex equipment.

  • Procedures to be used on receipt of the apparatus.

  • Dismantling: Recording Motor, Pump, apparatus details.  Customer information. Dismantling procedures.


The course programmes rely upon the full involvement of the delegates in discussions, exercises & assessments.