Shenzhen Zhongnuo Inspection & Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal mine safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
Does the explosion-proof certification include the explosion-proof 3C certification?
Currently, in China, explosion-proof certifications are categorized into Explosion-Proof 3C Certification and Explosion-Proof Compliance Certificate Certification.
The explosion-proof certificate and explosion-proof 3C certification are for different types of explosion-proof products and fall under different certification models.
As of October 1, 2009, certain explosion-proof electrical equipment was included in the CCC certification catalog, which is a mandatory product certification.
Products listed in the catalog undergo explosion-proof 3C certification, adopting the "Product Testing + Factory Audit" model.
Both product type tests and factory on-site audits are required.
Certificate of explosion-proof qualification is for products not listed in the explosion-proof 3C catalog. The certification model is product testing; upon successful testing, the explosion-proof qualification certificate can be issued.
Of course, products outside the explosion-proof 3C catalog can also apply for explosion-proof certifications, but there's a risk of being penalized by market regulation. This is something for the customer to consider. When inquiring, the customer should first confirm the type of product and then decide on the certification model. If you're unsure whether the product is within the explosion-proof 3C catalog, you can message Shenzhen ZhongNuo Testing Technology Co., Ltd. for an evaluation and confirmation!

Expiry Date of Explosion-Proof Certificate and Renewal Issues
The current validity period for domestic explosion-proof certification is 5 years from the date of issuance.
If the certificate is due to expire, you can choose to renew or replace it. When a company's explosion-proof qualification certificate is about to expire,
The company should provide an application letter for a certificate replacement within three months before and after the validity period, and should bring relevant documents for a new application for replacement.
Overseas explosion-proof certification, such as ATEX and IECEx certificates, is valid for a specific period.
Because their evidence collection method is by means of type testing.
A combination of product certification and factory production quality system audit.
Ensure the validity of the certificate.

The applicable standards in China for obtaining explosion-proof certification and explosion-proof 3C certification are primarily the GB/T3836 series. This series covers various explosion-proof types, each with specific requirements. Below are the main parts of the GB/T3836 series and their corresponding explosion-proof types:
GB/T 3836.1-2021: Part 1 - Equipment for explosive atmospheres: General requirements. This is the fundamental standard that all explosion-proof equipment must comply with.
GB/T 3836.2-2021: Explosive Atmospheres, Part 2: Equipment protected by a flameproof "d" enclosure. This specifies the requirements for equipment protected by flameproof enclosures.
GB/T 3836.3-2021: Part 3 - Equipment protected by increased safety "e". This specifies the requirements for equipment using increased safety protection.
GB/T 3836.4-2021: Part 4 - Equipment for explosive atmospheres protected by intrinsic safety "i". This specifies requirements for equipment protected by intrinsic safety.
GB/T 3836.5-2021: Part 5 of Explosive Atmospheres – Equipment protected by positive pressure enclosures “p”. This specifies the requirements for equipment protected by positive pressure enclosures.
Additionally, there are other standards such as GB/T 3836.6-2017 (equipment with "o" type liquid immersion protection), GB/T 3836.7-2017 (equipment with "q" type sand filling protection), GB/T 3836.8-2021 (equipment with "n" type protection), GB/T 3836.9-2021 (equipment with "m" type potting protection), and GB/T 3836.31-2021 (equipment with "t" type dust ignition-proof housing protection), each corresponding to different explosion-proof types and specific protection requirements.
Would you like to learn more details about these standards, such as specific requirements and design?
Please feel free to contact Shenzhen Zhongnuo Testing Technology Co., Ltd. anytime!

Explosion-proof product categories certified:
The new implementation measures 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 connector assembly
9. Explosion-proof surveillance products
10. Explosion-proof Communication and Signal Equipment
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
Explosion-proof Certification Application Consulting Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.