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.
Does the explosion-proof certification include the explosion-proof 3C certification?
So to speak, in China, explosion-proof certifications are divided into Explosion-Proof 3C Certification and Explosion-Proof Compliance Certificate Certification.
As of October 1, 2009, certain explosion-proof electrical equipment was included in the CCC certification catalog, which is a mandatory product certification. Products within the catalog must obtain the explosion-proof 3C certification, while explosion-proof products outside the catalog require an explosion-proof qualification certificate certification.
This falls under different certification models. For the explosion-proof 3C certification, it involves both "product testing and factory audit." It's not just about product testing; a physical audit of the production facility is also required. Only after both the product testing and factory audit are passed can the CCC certificate be issued.
Certification for explosion-proof compliance requires product testing. Upon passing the test, the explosion-proof certification can be issued repeatedly.
When inquiring, customers should first confirm the product type, then the certification model to be pursued.
For more details, please contact Shenzhen ZhongNuo Testing Technology Co., Ltd. directly!

Ex db eb rating higher than Ex db?
Composite explosion-proof marking indicates that a single explosion-proof type is insufficient for this product's explosion-proof requirements; it must utilize two or more explosion-proof types.
For example, explosion-proof equipment with antennas, the antenna part is usually intrinsically safe treated, making this equipment both explosion-proof and intrinsically safe.
Additionally, the nozzle part of the oiler generally belongs to Zone 0, which can only be made into intrinsic safety ia. Other parts can be made into Zone 1, suitable for intrinsic safety ib, or explosion-proof types.
Composite explosion-proof products do not mean that the product must meet all the requirements of different explosion-proof types simultaneously, nor does it imply that the explosion-proof level of a composite explosion-proof type is necessarily higher than that of a single explosion-proof type.
The primary factor in determining a product's explosion-proof level is the gas/dust combination, temperature group, and equipment protection class.
Gas Mixtures: II-C > II-B > II-A
Dust composition: III-C > III-B > III-A
Temperature Groups: T6 > T5 > T4 > T3 > T2 > T1
Equipment Protection Combination: Ga > Gb > Gc, Da > Db > Dc
For more details, please contact Shenzhen ZhongNuo Testing Technology Co., Ltd. directly!

What does the explosion-proof marking Exdb eb llB T6 Gb mean?
A complete explosion-proof label includes:
Ex Symbol
Explosion-proof type
Gas/Dust Combination
Temperature Category
Equipment Protection Level
Ex db ib IIc T4 Gb
Ex tb ⅢC T130°C Db
Ex db eb llB T6 Gb
Ex indicates explosion-proof
db eb indicates the equipment is of an explosion-proof type with隔爆and increased safety design
llB indicates that the equipment is suitable for explosive gas environments of llB and llA.
T6 indicates the equipment with a surface temperature not exceeding 85°C.
Gb is the protection level of the equipment, suitable for Zones 1 and 2

What are the requirements for enterprises to apply for explosion-proof certification -- Shenzhen Zhongnuo Testing Technology Co., Ltd.
For enterprises, there are no special requirements for applying for domestic explosion-proof certificates (excluding the explosion-proof 3C certification).
Primarily, it's about checking if the product meets the explosion-proof standards and whether 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 is a certification model that combines type testing with factory inspection.
In addition to product testing, an annual review of the manufacturing facility is required.
Explosion-proof Certification Application Consultation Service - Shenzhen ZhongNuo Inspection Technology Co., Ltd.