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Dr. Johannes Auret is a director and explosion prevention specialist at Explolabs and Certex. He has a PhD in engineering, and worked for the CSIR and SABS before joining Explolabs in 2001. He is active in industry standards development and has convened various working groups. Dr. Auret has published numerous technical articles and is a regular speaker and author. Tel: 011 316-4601, He answers questions on explosion protection… (more)


The repair of equipment for use in explosive atmospheres (EEA) is based on the principle of back to norm. This may be achieved by the manufacturer or a repairer, provided the right method is followed. The choice of the edition of a standard to use for repair is a grey area; the various options are discussed and best practice is presented… (more)

The inspection of explosion protected (Ex) equipment, together with appropriate maintenance and repair, is critical for safety. This paper highlights the differences between electrical and Ex inspections and presents some solutions based on standards covering the subject and best practice from experience… (more)

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