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.
What should be noted when applying for an explosion-proof certificate?
Is the product design in accordance with the GB/T3836 relevant standards?
2. Can you provide certification documents?
(1) Technical Drawings: Includes circuit diagrams, assembly drawings, structural drawings, PCB layouts, numbering diagrams, BOM sheets, etc.
(2) Product Corporate Standards and Instructions Manual
(3) Product Name, Model, Applicant Company
(4) Samples: Complete unit sample, battery, unencapsulated circuit board, non-metallic material surface blocks, etc.
(5) Additional Materials: Casting Process Documents, Ex Component Explosion-Proof Certificate Copy, Battery Testing Report, Shell Material Testing Report, Wireless Transmission Power Testing Report, etc.
Not all of the above information is required; it depends on the actual structure of the product and its explosion-proof type.
3. Do you have engineers with expertise in explosion-proof technology?
4. Are there specific requirements for the frequency of occurrence and explosion-proof grade?
5. Budget for costs
For more details, please contact Shenzhen ZhongNuo Testing Technology Co., Ltd. for further communication!

Many corporate clients are often baffled by the required corrosion resistance, protection class, and explosion-proof certification levels for their products.
Due to the one-character difference in names, both refer to a specific grade of the product, similar yet distinct.
What are the differences between them?
Corrosion prevention involves protecting metals prone to rust through various methods to extend their lifespan, typically employing physical, chemical, and electrochemical corrosion prevention techniques. It is commonly categorized into five levels: indoor F1, F2, and outdoor WF, WF1, and WF2.
Protection rating, commonly known as IP rating, refers to the dust and water resistance level of the equipment, typically consisting of "IP" followed by two digits.
The explosion-proof rating generally refers to the equipment's explosion-proof certification level. Each electrical device applying for explosion-proof certification will have a corresponding explosion-proof marking, including the explosion-proof type and rating. The explosion-proof rating indicates the product's applicable explosion-proof area, gas/dust groups, temperature groups, and equipment protection level, etc.
These three concepts belong to different fields and are distinct from each other.
For more information on this topic, please feel free to consult Shenzhen ZhongNuo Testing Technology Co., Ltd. at any time!

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 authorized institutions. They are all institutions that have been certified and authorized by the state, with testing conditions that meet the required standards, adhering to the same standards, and conducting the same testing. Under the same conditions, the trend is inevitable to opt for institutions offering services at more affordable prices. This is also a significant reason for the growing popularity of emerging explosion-proof enterprises.

Do I need a Coal Safety Certificate if the product already has an explosion-proof certificate?
The explosion-proof certificate and coal safety certificate are applicable to different venues.
Explosion-proof certificates generally refer to facilities used in places where explosive gases and dusts are present, excluding coal mine shafts.
Coal Safety Certificate refers to the safety certification mark for equipment and products used in underground coal mines.
So, whether to apply for an explosion-proof certificate or a coal safety certificate depends on where the product is used. If it's only used in non-coal mine explosive gas and dust environments, an explosion-proof certificate is sufficient. However, if it's also used underground in coal mines, a coal safety certificate is mandatory, and the two are not interchangeable.
Learn more details by sending a private message to Shenzhen ZhongNuo Testing Technology Co., Ltd.!
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.