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.
Certification Standards for Explosion-Proof Equipment Used in Explosive Gas Environments
GB/T 3836.1-2021 Explosive Atmospheres Part 1: Equipment General Requirements
GB/T 3836.2-2021 Explosive Atmospheres, Part 2: Equipment protected by explosion-proof enclosures "d"
GB/T 3836.3-2021 Explosive Atmospheres, Part 3: Equipment protected by intrinsic safety "i"
GB/T 3836.4-2021 Explosive Atmospheres, Part 4: Equipment protected by intrinsic safety "i"
GB/T 3836.5-2021 Explosive Atmospheres, Part 5: Equipment protected by positive pressure enclosures "p"
GB/T 3836.6-2017 Explosion-proof environment Part 6: Equipment protected by liquid immersion type “o”
GB/T 3836.7-2017 Explosive Atmospheres, Part 7: Equipment protected by sand-filled type "q"
GB/T 3836.8-2021 Explosive Atmospheres Part 8: Equipment protected by "n" type protection
GB/T 3836.9-2021 Explosive Atmospheres Part 9: Equipment protected by “m” type of cast-in cable glands

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 connection device
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 the requirements for enterprises to apply for explosion-proof certification? -- Shenzhen Zhongnuo Testing Technology Co., Ltd.
For enterprises, applying for a domestic explosion-proof certificate imposes no special requirements on them (except for the explosion-proof 3C certification).
Primarily, it's to check if the product meets the explosion-proof standards and if you can provide the relevant certification documents.
If the product falls under the explosion-proof 3C certification category, the applicant must have a production factory (OEM/ODM is also acceptable).
Because the explosion-proof 3C certification follows a certification model that includes both type testing and factory audit.
In addition to product testing, an annual inspection of the manufacturing facility is required.

The cost of obtaining explosion-proof certification through Shenzhen Zhongnuo Testing Technology Co., Ltd. is related to the following aspects:
1. Do you need a防爆 certificate or a防爆 3C certification? For the防爆 3C certification, a factory audit is required, which includes the audit fee, travel expenses for the auditor, and the applying fee and Certificate fee for the 3C certificate.
2. Related to explosion-proof markings. Different explosion-proof markings indicate different explosion-proof items, and naturally, the costs vary accordingly.
3. Domestic explosion-proof certification or international explosion-proof certification? The same explosion-proof mark, ATEX/IECEx certification is much more expensive than the domestic explosion-proof certificate, and it also requires a factory audit. North American explosion-proof certification is even more costly, over $100,000+
4. Do you need a retest? Some customers' products haven't even been designed with explosion-proof features. Bringing them in for整改 adds extra costs. Plus, if the product includes a battery, battery testing is also an additional expense, especially for those batteries that keep failing the tests.
5. Needed or not. Labs are often booked solid, and there's often a waiting list. If needed, there will be a fee involved.
Explosion Proof Certification Application Consulting Services - Shenzhen Zhongnuo Testing Technology Co., Ltd.