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.
The gas explosion-proof certification and dust explosion-proof certification we commonly refer to are categorized based on the applicable locations for the equipment.
For explosion-proof equipment used in various hazardous gas environments, conduct gas explosion-proof certification; for equipment used in flammable dust areas, perform dust explosion-proof certification.
In explosion-proof certification, gases are categorized as IIA, IIB, and IIC, while dusts are classified as IIIA, IIIB, and IIIC. Their characteristics and environments differ, necessitating different explosion-proof protection measures for equipment, and they should not be interchanged. Of course, some products, during the explosion-proof certification process, consider both gas and dust explosion-proof standards, allowing them to be used in both gas and dust environments. The explosion-proof certificate also indicates whether it is for gas or dust explosion-proof certification through the explosion-proof marking.
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Shenzhen ZhongNuo Inspection Technology Co., Ltd. has long focused on the explosion-proof field, boasting extensive forensic experience and a technical team in the current explosion-proof certification domain. We have experienced in-house electronic engineers who can offer explosion-proof services such as design, copyboard, circuit evaluation, and rectification, helping businesses avoid pitfalls and facilitate their explosion-proof certification process.

In the explosion-proof electrical construction industry, the explosion-proof electrical equipment installation qualification certificate is a must-have for numerous corporate clients engaged in explosion-proof installation and construction projects.
This certificate can be processed through Shenzhen Zhongnuo Testing Technology Co., Ltd.
The application process is simple. Just provide the company name and at least 3 employee lists, attend a two-day online training and exam, and you'll receive the certification upon passing the exam.
Currently, there are several institutions in China that can issue this explosion-proof installation qualification certificate. The application procedures, costs, and requirements for obtaining the explosion-proof installation qualification certificate vary by institution. For more details, please contact Shenzhen Zhongnuo Testing Technology Co., Ltd.

What are common misconceptions about explosion-proof certification?
The explosion-proof grade is not the higher, the better.
Incorporating explosion-proof ratings is related to product structure and installation locations. Choose the appropriate one. Of course, the higher the explosion-proof rating, the broader the range of applications, as long as the product structure meets the requirements.
2. Explosion-proof rating is not equal to protection rating.
The protection grade is what we commonly refer to as the IP rating, which is different from the explosion-proof grade.
3. The lower the temperature combination, the safer it is, rather than the higher the better.
Temperature combinations T6 (85°C), T5 (100°C), T4 (135°C), T3 (200°C), T2 (300°C), T1 (450°C) represent the high surface temperatures achieved by the equipment under adverse conditions. In explosive hazardous areas, of course, the lower the high surface temperature of the equipment, the safer it is.
4. Gas explosion-proof certificates cannot be used in dust areas, and conversely, dust explosion-proof certificates cannot be used in gas areas.
5. A防爆 certification is sufficient for use underground in coal mines.
Incorrect. Electrical equipment for underground coal mines must undergo Coal Safety Certification, with the frequent agency being the Coal Safety Standardization Center.
Explosion-proof certification is only applicable to locations where explosive gases and dust are used underground in non-coal mines. If the product is listed in the explosion-proof CCC catalog, it is required to undergo an explosion-proof 3C certification.

What is the relationship between the explosion-proof certificate and the explosion-proof CCC certification?
The explosion-proof certificate and the explosion-proof 3C certification are for different types of explosion-proof products.
Explosion-proof 3C Certification is applicable to products listed in the Explosion-proof 3C Catalog. There is a dedicated product catalog for explosion-proof 3C. Products within the catalog should apply for explosion-proof 3C certification, which involves a "Product Testing + Factory Audit" model. This entails both type testing of the products and on-site factory audits.
Ex-proof Certificate applies to products outside the Ex-proof 3C Catalogue. The certification model is Product Testing, and once Product Testing is passed, an Ex-proof Certificate can be issued frequently.
Of course, products outside the explosion-proof 3C catalog can also apply for the explosion-proof certification, but there's a risk of being penalized by market regulation. This is something the customer needs to consider on their own.
Explosion-proof Certification Application Consultation Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.