What is IEC 60079-19? Repair and Overhaul of Explosive Atmosphere Equipment.
Short answer: IEC 60079-19, equipment for explosive atmospheres. repair, revision and improvement (reclamation) It regulates the processes. When an Ex equipment breaks down, it cannot be repaired haphazardly; it must be repaired in accordance with the rules by a competent repair shop in a way that preserves its protective properties and is properly marked.
Explosive atmosphere equipment leaves the factory certified — but a malfunction or improper repair can instantly nullify that certification. Ex equipment, 'made operational' by an ordinary engine winder or maintenance crew, may no longer be explosion-safe, even if it appears to work. IEC 60079-19 manages precisely this invisible risk: it mandates that repairs be carried out in a way that restores the equipment to its original level of protection.
Basic Principle: Repair without compromising the protective properties.
At the heart of the standard is a single rule: repairing the equipment... original protection type (Ex d, e, i…) and certification conditions It must be restored exactly as it was. For example, when machining the flame path surface of a flameproof (Ex d) housing, critical dimensions must be preserved; the winding of an enhanced safety (Ex e) motor must be done with materials and methods that do not alter the original temperature and tE values. This is only possible with Ex repair. a competent repair shop And it is possible with trained personnel.
Marking and Registration: 'R' Mark
Repaired Ex equipment is specially marked for traceability (usually with a repair 'R' mark and label) and the entire process is documented. These records document the equipment's history, the work performed, and whether it still meets the certification requirements. If the equipment cannot be fully restored to its original condition, restricted use or scrapping is considered.
Relationship with Periodic Inspection
One of the most frequent critical findings during periodic examinations (60079-17) is a history of... improper repairs and renovationsThese include holes drilled without manufacturer approval, incorrect spare parts, and improper winding. AES audits uncover these hidden risks by also evaluating the equipment's repair history and compliance with 60079-19.
Frequently Asked Questions
Can I have Ex equipment repaired at a regular repair shop?
No. Ex equipment should only be repaired in workshops capable of restoring its protective properties and operating in accordance with IEC 60079-19.
Should the equipment be retested after repair?
Yes. After repair, it must be verified, marked, and recorded that the equipment is still providing its protective function.
Review your Ex-Equipment Repair History
Related service: Explosive Atmosphere (ATEX/Ex-Proof) Inspections.