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简体中文EX EAC certificate for hazardous atmospheres TR CU 012/2011, Atex for Russia
EAC EX Certificate for Hazardous Atmospheres – Last Update: March 2026
Ensuring safety in potentially explosive environments is one of the most critical challenges in modern industrial engineering. The legal and technical foundation for equipment operating within the Eurasian Customs Union (Russia, Belarus, Kazakhstan, Armenia, and Kyrgyzstan) is the Technical Regulation 012/2011 (TR CU 012/2011). This regulation, in force since 2012, dictates the mandatory safety requirements for all equipment and protection systems intended for use in explosive atmospheres.
The resulting EAC EX Certificate serves as the official proof of conformity, acting as the Eurasian counterpart to the European ATEX Directive. It certifies that both electrical and non-electrical equipment meet stringent safety standards designed to eliminate potential ignition sources in the presence of flammable gases, vapors, or dust.
Technical Context and International Standards
Modern explosion protection is built upon a foundation of continuous technological evolution. The TR CU 012/2011 certification integrates international standards set by the International Electrotechnical Commission (IEC), adapting them to the specific GOST requirements of the Customs Union. This system utilizes globally recognized protection methods such as flameproof enclosures (Ex d), intrinsic safety (Ex i), and pressurized equipment (Ex p).
An EAC EX certificate is far more than a simple regulatory hurdle; it is an essential guarantee for plant integrity and personnel safety. It confirms that the certified equipment maintains its protective function even under extreme conditions, thereby mitigating the risk of catastrophic accidents in industrial facilities.
How to Read the EAC EX Marking (Practical Example)
Russian marking follows the international IEC standard. Example:
1Ex d IIC T4 Gb X
| 1 | Protection Level: 0 (Very High), 1 (High), 2 (Normal). |
| Ex | Explosion-proof Symbol: Compliance with EAC standards. |
| d | Protection Type: “Flameproof enclosure”. |
| IIC | Gas Group: Suitable for Hydrogen and Acetylene. |
| T4 | Temperature Class: Max surface temperature 135°C. |
| Gb | EPL: Equipment Protection Level for gaseous atmospheres. |
| X | Special Conditions: Requires specific attention as detailed in the manual. |
Classification of Zones and Protection Methods
| Explosive Atmosphere | Gas / Vapors | Combustible Dusts |
|---|---|---|
| Constant / Long duration | Zone 0 | Zone 20 |
| Occasional (normal operation) | Zone 1 | Zone 21 |
| Rare / Short duration | Zone 2 | Zone 22 |
- Ex d: Flameproof enclosure
- Ex e: Increased safety
- Ex i: Intrinsic safety (ia, ib, ic)
- Ex p: Pressurization
- Ex m: Encapsulation
- Ex h: Protection for mechanical equipment
Frequently Asked Questions (FAQ)
The regulation covers a wide array of equipment, including both electrical devices and mechanical components used in hazardous zones. It is important to note that, unlike the European ATEX directive, devices intended for medical use are explicitly excluded from the scope of the EAC TR CU 012/2011 regulation.
Products that have successfully passed the conformity assessment must bear the EAC mark along with the specific Eurasian Ex-symbol. This marking must be clearly visible on the product’s nameplate and within the technical documentation, signaling that the equipment is safe for use in its designated explosive atmosphere.
For serial production certification (valid for up to 5 years), a factory inspection by accredited experts from the Customs Union is mandatory. This inspection ensures that the manufacturing processes are capable of maintaining consistent quality and safety standards for all certified equipment.
The system offers flexibility through different certification models: certificates can be issued for a single shipment (batch-based), tied to a specific contract, or for serial production with a maximum validity of 5 years. Serial certificates require annual surveillance audits to maintain their validity.
Yes, this is a fundamental requirement. To obtain EAC EX certification for a complete system or assembly, all safety-critical components identified in the risk analysis must already hold their own individual EAC EX certificates. If a component is not previously certified, it must undergo full testing as part of the system evaluation, which can significantly increase the complexity and duration of the certification process.
Technical Comparison: ATEX vs. EAC EX
| Feature | ATEX (EU Directive 2014/34/EU) | EAC EX (TR CU 012/2011) |
|---|---|---|
| Jurisdiction | European Union and EFTA member states. | Russia, Belarus, Kazakhstan, Armenia, and Kyrgyzstan. |
| Marking | CE Mark + Hexagonal Ex symbol. | EAC Mark + Eurasian Ex symbol. |
| Language | Official languages of the destination country. | Mandatory Russian translation for all technical documents. |
| Medical Devices | May fall under ATEX scope. | Explicitly excluded from TR CU 012/2011. |
Processing Time
The standard timeline for issuing the certificate ranges from two to eight weeks following the submission of all required technical files.
Personalized Quote
Costs are calculated based on product complexity, the number of variants, protection methods, and required laboratory testing.
Regional Validity
Certificates are valid across all member states of the Eurasian Customs Union without the need for additional national approvals.
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