ATEX FAQ — frequently asked questions on explosion protection
The questions I most often get from operators — answered plainly and practically. If yours isn't on the list, book a free online call and we talk it through.
What is ATEX, who does it apply to?
What is ATEX, and does it apply to me?
ATEX is the EU's explosion protection framework. If flammable gas, vapour or dust can occur at your facility (e.g. solvents, natural gas, flour, wood or metal dust), it applies to you. The details are on the What is ATEX? page.
How do I know if my site is subject to ATEX?
If there's a process point where an explosive atmosphere can form, a risk assessment and zone classification are needed. The fastest pre-screen is the 2-minute self-test — afterwards we clarify it in a short online call.
What's the difference between gas and dust ATEX?
Gas/vapour and dust use separate zone systems and equipment groups (gas: 0/1/2, IIA/IIB/IIC; dust: 20/21/22, IIIA/IIIB/IIIC). The detailed explanation is on the zone classification page.
EPD, updates and responsibilities
Is the Explosion Protection Document (EPD) mandatory?
Yes. Under Hungarian decree 3/2003, the operator must have an Explosion Protection Document — already before initial commissioning. Details: EPD preparation and update, and the Decree 3/2003 page.
How often does the EPD need to be updated?
Whenever the technology or equipment changes significantly. There is no fixed interval, but in practice it's worth reviewing it at least every 3 years to keep it current.
Who is responsible for ATEX compliance?
Primarily the operator / employer. The designer, the contractor and the equipment manufacturer are each also responsible within their own scope. The role split is detailed on the Who does what? page.
What happens if I don't have a valid ATEX document?
Beyond regulatory fines and operational risk, the insurer may also refuse to pay out after a possible explosion or fire if the required documentation is missing.
Periodic inspection — frequency, scope, shutdown
How frequent is the periodic ATEX inspection?
Under IEC 60079-17, the typical cycle is annual visual inspection and a close/detailed inspection every 3–5 years, depending on environment and equipment condition. Details: IEC 60079-17 inspection.
What does an inspection report contain?
Photo-documented inspection sheets, a prioritised defect list (immediate / planned / next cycle) and remediation recommendations. On request also in English, for parent companies or insurers.
Does the plant need to be shut down for the inspection?
Visual and close inspection can largely be done during operation. The detailed (opening) inspection can be scheduled to a planned shutdown to minimise downtime.
Cost, remote help, scope of work
How much does an ATEX inspection or EPD cost?
It depends on the size of the site, the number of pieces of equipment and the state of the existing documentation. After a short online call I provide a concrete net price quote. As an indication, the ATEX inspection cost page can help.
Can you help remotely / online too?
Yes. Many questions and pre-screens can be handled online — that's what online ATEX consultation is for. Inspection and on-site assessment naturally require a physical site visit.
Do I only get documents, or do you also help in practice?
I also help in practice. As a field engineer, I understand ATEX from the side of maintenance and day-to-day operations — the documentation I produce matches the actual site situation, not only the standard.
Ask directly
Book a free 30–60 minute online needs assessment. We'll talk through your site's situation, and I'll tell you what's actually needed — with a concrete written quote.