Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal mine safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
Certification standards for explosion-proof equipment used in environments with explosive gas:
GB/T 3836.1-2021 Explosive Atmospheres, Part 1: Equipment – General Requirements
GB/T 3836.2-2021 Explosive Atmospheres – Part 2: Equipment protected by an explosion-proof enclosure "d"
GB/T 3836.3-2021 Explosive Atmospheres, Part 3: Equipment protected by increased safety "e"
GB/T 3836.4-2021 Explosive Atmospheres – Part 4: Equipment protected by intrinsic safety “i”
GB/T 3836.5-2021 Explosive Atmospheres, Part 5: Equipment protected by positive pressure enclosure "p"
GB/T 3836.6-2017 Part 6: Equipment protected by liquid immersion type “o” for explosive environments
GB/T 3836.7-2017 Explosive Atmospheres, Part 7: Equipment protected by sand filling type “q”
GB/T 3836.8-2021 Explosive Atmospheres Part 8: Equipment protected by "n" type protection
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by "m" type encapsulation

IECEx Certification
IECEx is a certification system for explosion-proof electrical products promoted by the International Electrotechnical Commission (IEC), aimed at eliminating discrepancies in equipment and services used in explosive environments, promoting international trade, while maintaining the level of safety requirements. The current explosion-proof standard is IEC 60079. IECEx certification has become a route for products used in all hazardous areas to obtain international safety certification, and is currently recognized in many parts of the world (Australia, New Zealand, Brazil, Canada, China, Japan, South Korea, Malaysia, Singapore, South Africa, the United States, etc.). Certificates issued by IECEx are automatically uploaded to the IECEx website, where manufacturers and end-users can find relevant documents.

What products can apply for the intrinsically safe explosion-proof certification? What are the requirements?
Benign safety is one type of explosion-proof protection, which restricts electrical energy so that even if the equipment fails,
A type of explosion-proof protection that the generated energy is insufficient to ignite the surrounding explosive environment.
Therefore, intrinsic safety requirements impose limitations on electrical equipment such as current, voltage, capacitance, and inductance, making it suitable only for low-power devices.
Additionally, the intrinsically safe type has clear requirements for the power supply method of the equipment, plastic housing, and wireless transmission.
The application for ATEX certification requires providing the circuit diagram and PCB layouts of the product.
ZhongNuo Inspection has dedicated engineers specializing in intrinsically safe circuit and structural design.
We offer technical consulting services for explosion-proof circuit design, drafting, and modification. We have extensive experience in designing and obtaining certifications for the intrinsically safe ia, ib, and ic explosion-proof classifications.
If you require certification in this area, feel free to message us directly!

What standards are used for explosion-proof certification? What are the technical requirements?
An explosion-proof type is a type of explosion-proof design for electrical equipment.
The housing is designed to withstand explosive mixtures entering the housing through the housing joints or structural gaps, allowing them to explode internally without causing damage.
And ignition of an explosive gas atmosphere formed by one, several gases or vapors.
Explosion-proof casings must possess both explosion-proof and anti-explosion capabilities. Generally, the casings of explosion-proof products are rather bulky, suitable for products and equipment designed for fixed installations and use.
Combustible gas-tight joint width, gap, and roughness are the three essential elements of explosion-proof housing design.
Design requirements for explosion-proof three elements vary depending on different explosive gas environments used in Class I mining, non-mining Class IIA, IIB, and IIC.
Refer to the design standards of GB/T3836.1 and GB/T3836.2 for specifics.
ZheNuo Inspection has long been dedicated to explosion-proof product design, testing, and certification services.
We have a dedicated team in the explosion-proof field, well-versed in the requirements of explosion-proof standards.
We offer explosion-proof housing design, drafting, modification guidance, certification agency services.
If you have a similar need, feel free to DM us anytime!
Explosion-proof Certification Application Consultation Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.