| Publisher | IECEx (IEC System) and the European Union |
|---|---|
| Type | Certification scheme (IECEx) and regulation (ATEX, EU directives) |
| Scope | Conformity assessment and certification of equipment, services and personnel for explosive atmospheres internationally (IECEx), and the legal requirements for such equipment and workplaces in the European Union (ATEX). |
| Who uses it | Equipment manufacturers, certification bodies, Ex service facilities, inspectors, engineers specifying equipment for international or European projects, and employers operating hazardous sites in Europe. |
| Edition note | The ATEX equipment directive in force is 2014/34/EU and the workplace directive is 1999/92/EC. IECEx rules and operational documents are maintained by IECEx; refer to the publishers for current versions. |
What It Is
IECEx is the IEC System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres. It is an international conformity assessment system that uses the IEC 60079 and related standards as its technical basis. Its best-known component is the Certified Equipment Scheme, under which an approved certification body tests and assesses equipment, audits the manufacturer's quality system and issues a publicly searchable certificate of conformity. IECEx also operates schemes for service facilities that repair and overhaul Ex equipment and for the Certification of Personnel Competence (CoPC).
ATEX is the name commonly used for two European Union directives. The equipment directive, 2014/34/EU, sets legal requirements for placing equipment and protective systems intended for potentially explosive atmospheres on the EU market, including conformity assessment, often involving a notified body, and CE marking. The workplace directive, 1999/92/EC, sets minimum requirements for protecting workers, including risk assessment, zoning and an explosion protection document.
Why It Matters
For equipment destined for the EU, ATEX compliance is a legal requirement for market access. IECEx certification is not law in itself, but many countries accept or recognize it directly, and global operators frequently specify it to simplify procurement. Because both systems build on IEC 60079, a manufacturer can often pursue both with shared test evidence.
For engineers and technicians, the practical value lies in reading certificates and markings correctly, checking that the certified conditions of use match the installation, and understanding that personnel competence and repair quality are part of keeping an installation safe over time.
Key Concepts
- Certified Equipment Scheme — the IECEx scheme under which equipment is tested, the manufacturer's quality system is assessed and an online certificate is issued.
- Certification of Personnel Competence — an IECEx scheme that assesses and certifies individuals for defined Ex units of competence, such as installation, inspection or repair.
- Notified body — an organization designated by an EU member state to carry out conformity assessment tasks under the ATEX equipment directive.
- Equipment groups and categories — ATEX uses Group I for mining and Group II for other locations; Group II equipment is assigned category 1, 2 or 3 according to its level of protection, with G or D indicating gas or dust.
- Specific conditions of use — limitations stated on a certificate, often signaled by an X suffix, that the installer must respect.
- Explosion protection document — a written record required under the ATEX workplace directive describing hazards, zoning and protective measures.
Who Should Know It
- Engineers specifying Ex equipment for international and European projects
- Manufacturers and product compliance specialists
- Ex inspectors and technicians verifying certificates and markings
- Repair and service facility personnel
- Operators and safety managers of hazardous sites in Europe
Related Standards
- IEC 60079 Series — the technical standards on which both IECEx certification and ATEX harmonized standards are based.
- NEC Articles 500-506 — the US framework; equipment certified for IECEx or ATEX does not automatically meet US listing requirements.
- ISO/IEC 17025 — the competence standard for testing laboratories that support certification.
- IEC 60529 — enclosure IP ratings are frequently stated alongside Ex markings.
How ASEEE Uses It
ASEEE hazardous area programs map learning outcomes and assessments to the concepts behind IECEx and ATEX, including reading certificates and markings and understanding personnel competence and repair requirements. See related ASEEE programs.
Educational summary only. ASEEE is not the publisher of this document and this page does not reproduce or replace it. Always consult the current official edition from the IECEx System and the European Union for requirements.