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.
Explosion-proof product categories certified:
The new implementation details are divided into 17 product units:
Explosion-proof Motors: Center height ≤ 160mm, or rated power ≤ 15kW; Explosion-proof Motors: 160mm < center height ≤ 280mm or 15kW < rated power ≤ 100kW; Explosion-proof Motors: 280mm < center height ≤ 500mm or 100kW < rated power ≤ 500kW; Explosion-proof Motors: Center height > 500mm or rated power > 500kW.
2. Explosion-proof electric pumps
3. Explosion-proof distribution equipment
4. Explosion-proof switches, control, and protection products
5. Explosion-proof starters
6. Explosion-proof Transformers
7. Explosion-proof electric actuators, solenoid valves
8. Explosion-proof socket connector
9. Explosion-proof surveillance products
10. Explosion-proof Communication and Signal Devices
11. Explosion-proof Air Conditioners, Ventilation Equipment
12. Explosion-proof electric heating products
13. Explosion-proof accessories, Ex components
14. Explosion-proof instruments and meters
15. Explosion-proof sensor
16. Safety Fencing
17. Explosion-proof instrument cabinets

What are common misconceptions about explosion-proof certification?
Explosion-proof ratings are not the higher, the better.
Explosion-proof ratings are related to product structure and installation/use locations. Choose the appropriate one. Of course, as long as the product structure meets the requirements, the higher the explosion-proof rating, the wider the applicable range.
2. Explosion-proof rating is not the same as protection rating.
The protection grade refers to the IP rating we often mention, 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) indicate 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 environments, and conversely, dust explosion-proof certificates cannot be used in gas environments.
5. A防爆 certification is sufficient for use underground in coal mines.
Wrong. Electrical equipment for coal mine underground requires coal safety certification, and the frequent agency is the Safety Standardization Center.
Explosion-proof certification is applicable only to locations where explosive gases and dust are present 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.

Do you need to do an explosion-proof design before applying for the explosion-proof certification of the product?
This is for sure.
The process of obtaining a explosion-proof certification for products is to pass the relevant test items of the explosion-proof standards and acquire an explosion-proof qualification certificate.
To ensure the product passes the explosion-proof standard test items, it is definitely necessary to design the product according to the test requirements, which is to say, to implement explosion-proof design.
For explosion-proof requirements, refer to GB/T3836.1 and GB/T3836.2; for intrinsically safe designs, consult GB/T3836.1 and GB/T3836.4; and for positive pressure designs, refer to GB/T3836.1 and GB/T3836.5.
If your equipment is looking to apply for explosion-proof certification and enter the explosion-proof market, private message us right away! ZhongNuo Testing has been deeply involved in the explosion-proof field for many years, well-versed in the technical requirements of GB/T3836 and EN/IEC60079 explosion-proof standards, offering explosion-proof product rectification and design guidance, as well as a one-stop explosion-proof technical solution.

What is the relationship between the explosion-proof certificate and the explosion-proof CCC certification?
The explosion-proof certificate and 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 Catalogue. There is a dedicated product directory for Explosion-proof 3C. Products within the directory require an Explosion-proof 3C Certification, which involves a "Product Testing + Factory Audit" approach, encompassing both type testing of the product and on-site factory audit.
Ex-proof certification is applicable to products not listed in the Ex-proof 3C Catalog. The certification model involves product testing; upon successful testing, an Ex-proof certification can be issued frequently.
Of course, products outside the explosion-proof 3C catalog can also apply for explosion-proof certifications alone, but there's a risk of being penalized by market supervision. This should be considered by the customer themselves.
Explosion-proof Certification Application Consulting Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.