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.
ATEX Certification
ATEX is the European directive for "Equipment and protective systems intended for use in potentially explosive atmospheres," aiming to establish a single market within Europe, remove technical trade barriers, and ensure 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 scope of potentially explosive environments to include airborne dust and flammable gases, vapors, and mists, and stipulates basic health and safety requirements for equipment intended for potentially explosive atmospheres, as well as the conformity assessment procedures that must be adopted before the equipment enters the European market. The current directive is 2014/34/EU.

North American Explosion Proof Certification
The North American explosion-proof certification system (hereinafter referred to as NEC system [NEC: National Electrical Code]) differs significantly from our country's explosion-proof certification system under the support of the national standards (hereinafter referred to as GB system) in aspects such as the classification and grouping of explosive materials, the division of hazardous areas, explosion-proof protection methods, and installation wiring. Currently, North American explosion-proof certification is divided into two major systems: Division and Zone. The Division system uses the explosion-proof marking of the United States, while the Zone system adopts explosion-proof standards consistent with the IEC system.

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 capable of withstanding explosive mixtures entering the housing through the housing joint surfaces or structural gaps, without damage upon internal explosion.
And causes ignition of explosive gas atmospheres formed by one or more gases or vapors.
Explosion-proof casings must possess both explosion-proof and anti-explosion capabilities. Generally, the casings for explosion-proof products are rather bulky, suitable for products and equipment that are fixedly installed and used.
Explosion-proof interface width, gap, and roughness are the three key elements of explosion-proof housing design.
Design requirements for explosion-proof triad elements vary depending on the different explosive gas environments used in Class I mining, non-mining Class IIA, IIB, and IIC.
Please refer to the design standards of GB/T3836.1 and GB/T3836.2 for specifics.
Zhonuo Inspection has long been dedicated to explosion-proof product design, testing, and certification services.
Our team in the explosion-proof field is 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 need for this as well, feel free to message us anytime!

List of Domestic Explosion-Proof Certification Bodies:
1. Nanyang CNEX
2. Shanghai Coal Research Institute
3. National Electrical Appliance Quality Supervision and Inspection Center
4. Guangdong CQCEx National Explosion-Proof Equipment Quality Supervision and Inspection Center
5. National Coal Mine Explosion-Proof Safety Product Quality Supervision and Inspection Center
6. Jiamusi Explosion-Proof Institute
7. Tianjin PCEC
8. Shanghai NEPSI
9. Beijing Coal Research Institute CCRI, etc.
For applicants, the type of explosion-proof model to apply for and the explosion-proof level to choose are essentially the same across all authorized institutions. They are all nationally authorized institutions that have undergone certification, equipped with testing conditions that meet standard requirements, adhering to the same standards, and conducting the same testing. Under the same conditions, the trend is inevitable to choose institutions that offer more affordable services at a lower price. This is also a significant reason for the increasing popularity of emerging explosion-proof enterprises.
Explosion Proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.