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 one-stop explosion-proof technology consulting services.
List of Domestic Explosion-Proof Certification Institutions:
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, what type of explosion-proof and what level of explosion-proof to choose is actually the same across all reputable institutions. They are all authorized by the state and have passed certification, possessing testing conditions that meet standard requirements. They adhere to the same standards and conduct similar testing. Under the same conditions, it's an inevitable trend to opt for institutions that offer more affordable services at a more reasonable price. This is also a significant reason why emerging explosion-proof enterprises are increasingly popular.

ATEX Certification
ATEX is the European directive for "Equipment and protective systems intended for use in potentially explosive atmospheres."
The aim is to establish a single market within Europe and eliminate trade technical barriers.
Ensure free circulation of equipment intended for potential explosive hazardous environments among its member states.
This directive covers equipment for both mining and non-mining operations (including mechanical and electrical equipment).
Expand the potential explosive hazard environment to include airborne dust and flammable gases, flammable vapors, and mist.
The basic health and safety requirements for the use of equipment in potentially explosive environments have been stipulated.
And the conformity assessment procedures that must be adopted before the equipment enters the European market.
The current directive is 2014/34/EU.

Sample requirements for explosion-proof certification application:
The sample units submitted by the company for inspection must match the approved drawings and be fully assembled; the number of units inspected should meet the requirements.
If special disassembly tools are required, they should be sent along as well.
For potting type electrical equipment, one set of products with and without potting should be sent.
The transparent pieces for the observation window should be sent separately in at least 3, but no more than 5.
The transparent parts of the lighting fixtures should be sent separately with at least 5 pieces, but no more than 8.
Rubber aging tests should provide 3 to 5 pieces of 35156 rubber blocks.
Two plastic sheets with a diameter of 15060mm are required for the insulation resistance test of the plastic housing. If the size permits, the test can be directly conducted on the plastic housing.
1-2 finished products are generally required.

In hazardous areas where flammable and explosive materials are present, the site must be divided into explosion-proof zones based on the frequency and duration of the material's occurrence, to ensure the correct selection and installation of electrical equipment within the hazardous area, aiming for safe operation. Divisions are made according to explosion-proof standards.
Explosive gas environments are classified into Zone 0, Zone 1, and Zone 2. Zone 0 is hazardous, indicating that explosive gas mixtures are present for extended periods under normal conditions, such as within oil and gas transmission pipelines. Correspondingly, explosion-proof areas for explosive dust environments are classified into Zones 20, 21, and 22.
Dividing explosion-proof zones is crucial for selecting the correct explosion-proof electrical equipment. For instance, in Zone 0, intrinsically safe ia electrical equipment must be chosen, while in Zone 1, both intrinsically safe ia and ib electrical equipment can be selected, offering a wider range of options.
For more information on explosion-proof products, please feel free to contact Shenzhen ZhongNuo Testing Technology Co., Ltd. for further communication.
explosion-proof certification application consulting service - Shenzhen Zhongnuo Testing Technology Co., Ltd.