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.
Flammability Dust Environment Explosion Proof Certification Standard:
GB/T 3836.1-2021 Explosive Atmospheres Part 1: Equipment General Requirements
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 housing "p"
GB/T 3836.9-2021 Explosive Atmospheres Part 9: Equipment protected by "m" type encapsulation
GB/T 3836.31-2021 Explosive Atmospheres Part 31: Equipment protected by dust-protection enclosures “t”

What's the difference between corrosion protection grade, protection grade, and explosion-proof certification grade?
Many corporate clients are often in the dark about the required corrosion resistance, protection, and explosion-proof certification levels for their products.
Due to the one-character difference in names, both refer to the grade of a product's aspect, similar yet distinct.
What are the differences between them?
Corrosion prevention involves protecting metals prone to rust through various means to extend their lifespan, typically using methods such as physical, chemical, and electrochemical corrosion prevention. There are five common grades: 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 grade generally refers to the equipment's explosion-proof certification level. Each electrical device applying for an explosion-proof certification will have a corresponding explosion-proof marking, including the type and grade of explosion-proof. The explosion-proof grade indicates the product's applicable explosion-proof area, gas/dust groups, temperature groups, and equipment protection level, etc.
Clearly, these three concepts belong to different fields and are distinct from each other.
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Domestic explosion-proof certification
Domestic explosion-proof certification is a compliance inspection for explosion-proof products used in explosive environments (including electrical and non-electrical products), issuing an explosion-proof certificate for products that meet the GB/T3836 standard. Currently, the domestic explosion-proof certification standards are essentially equivalent to the international IEC60079 standard system.

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 Catalogue. There is a dedicated product directory for Explosion-proof 3C.
Products listed in the catalog undergo explosion-proof 3C certification, adopting the "Product Testing + Factory Audit" model.
Both product type tests and on-site factory audits are required.
Ex-proof certificate for products not listed in the Ex-proof 3C catalog.
Certification mode is product testing; upon passing the test, a frequent explosion-proof certification can be issued.
Of course, products outside the explosion-proof 3C catalog can also apply for just the explosion-proof certification, but there is a risk of being penalized by market regulation.
This is for the customer to consider.
For more details, please feel free to contact Shenzhen ZhongNuo Testing Technology Co., Ltd. for further communication!
Explosion Proof Certification Application Consulting Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.