Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
Division of explosion-proof zones in explosive gas environments
In explosion certification, hazardous areas are divided into explosive gas environments and combustible dust environments based on the different states of substances present in the location. According to the duration of presence of hazardous substances in the location, the hazardous areas under the two different states are further divided into three zones.
That is: for explosive gas environments, it includes Zones 0, 1, and 2;
Areas with continuous or long-term explosive gas environments, typically exceeding 1000 hours per year.
Zone 1 - Areas where explosive gas environments may occur during normal operation, typically 10-1000 occurrences per year.
Zone 2: Under normal operation, explosive gas atmospheres are not likely to occur or, if they do, are only transient and of short duration, typically less than 10 occurrences per year.

The ATEX certification and the Coal Mine Safety Certification differ significantly in terms of definition, application, and certification certificates.
Intrinsically Safe Certification, also known as intrinsic safety explosion-proof certification, primarily focuses on the energy limitation of electrical equipment circuits. By limiting the energy in the circuit, it ensures that the electrical sparks or thermal effects produced by the equipment during normal operation or under specified fault conditions cannot ignite the surrounding flammable and explosive environment. This certification method is widely used for low-power consumption, low-energy instruments, handheld terminal products, and other similar items.
The Coal Safety Certification, abbreviated as MA Certification, is a unique safety certification mark required for equipment and products used in coal mines in China. This certification system effectively prevents substandard products from entering the underground, thereby ensuring the safety of coal mine production. In the type testing phase of the coal safety certification, in addition to performance tests based on industry standards, consideration must also be given to the presence of flammable and explosive mixtures such as methane in the operating environment to ensure the safe use of equipment in coal mine shafts.
Furthermore, while both the Coal Safety Certification and the Mine Safety Certification (KA Certification) are unique safety certification systems for underground equipment in our country, there are distinct differences in their definitions and testing methods. The Coal Safety Certification is primarily used for equipment in coal mine underground, whereas the Mine Safety Certification is used for non-coal mines' other metallic or non-metallic mines.
In summary, there are distinct differences in certification purposes, scope of application, and testing requirements between the ATEX certification and the Coal Mine Safety certification. Should you have any questions or needs regarding these certifications, please feel free to contact Shenzhen ZhongNuo Testing Technology Co., Ltd., and we will be dedicated to serving you.

How to apply for an explosion-proof certification for a modular equipment?
Now there are more composite equipment used in explosion-proof areas, achieving more complex functions. In response to the technical requirements for explosion-proof certification of such equipment, ZN Testing summarizes years of industry experience, mainly including the following points:
(B1) Explosion-proof performance only considers the electrical part, including the installation and connection between electrical components, grounding, etc., without considering the steel structure part.
(2) Electrical components must be purchased and installed with a防爆 certification or a防爆3C certificate. If suitable explosion-proof electrical components cannot be obtained, consider using explosion-proof/positive pressure methods for installation.
(3) The explosion-proof marking of the selected explosion-proof electrical components must not be lower than the explosion-proof marking grade of the entire machine.
(4) Explosion-proof electrical components must be installed, electrical connections, grounding, etc., in compliance with standard requirements
In the field of obtaining certifications for modular equipment, China Nuodetection boasts a technical team and industry experience capable of providing guidance on explosion-proof designs such as positive pressure and explosion-proof.
Guide customers in selecting, installing electrical equipment, preparing technical drawings and documents, and can also assign engineers for on-site inspections to reduce the customer's certification costs and time. Successful certification cases include robots, AGV vehicles, industrial ovens, high and low-temperature chambers, filling machines, dispensing machines, jacking oiling units,
Chemical storage cabinets, dust removal equipment, etc. If you have a need in this area, feel free to DM us for further discussion!

ATEX Certification
ATEX is the European directive for "Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres," aimed at establishing a single market within Europe, removing technical barriers to trade, and ensuring the free circulation of equipment intended for use in potentially explosive environments among member states. This directive encompasses both mining and non-mining equipment (including mechanical and electrical equipment), extends the potential explosive atmosphere to include airborne dust and flammable gases, vapors, and mists, and stipulates the basic health and safety requirements for equipment intended for potentially explosive environments, as well as the conformity assessment procedures that must be adopted before equipment enters the European market. The current directive is 2014/34/EU.
explosion-proof certification application consulting service - Shenzhen Zhongnuo Testing Technology Co., Ltd.