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.
Can ODM/OEM companies apply for explosion-proof certification and explosion-proof 3C certification? What are the requirements?
Many customers are asking if their products are OEM-manufactured, ODM-branded, or purchased.
Can you handle explosion-proof certification or explosion-proof 3C certification?
Here, China Nuoding Inspection introduces the requirements and conditions for obtaining explosion-proof certification and explosion-proof 3C certification.
If applying for an explosion-proof certification, the company only needs to provide product design drawings and samples.
No requirements regarding the existence of a production factory. Therefore, it doesn't matter if it's an OEM, ODM, or a product purchased directly.
As long as the required drawings and samples for certification are provided, a防爆合格证 can be issued.
Of course, the provided drawings and samples must comply with the requirements of the explosion-proof certification standards.
Applying for the explosion-proof 3C certification requires an additional factory audit and an annual supervision review compared to the explosion-proof qualification certificate.
Therefore, the applicant must have their own manufacturing factory/OEM/ODM factory.
The application process is also more complex and costly, with a longer duration, compared to obtaining the explosion-proof certification.
ZheNuo Inspection has been deeply involved in the explosion-proof field for many years, well-versed in the requirements of the GB/T 3836 series standards.
We have extensive experience in the design and modification guidance for explosion-proof products.
We offer a one-stop service for explosion-proof certification, including design modification, drawing evaluation, certification acquisition, factory audit, and explosion-proof 3C certification.
Extensive experience and case studies in evidence collection. Welcome to DM us!

Intrinsically Safe Certification, also known as Intrinsically Safe防爆 certification. In the explosion-proof industry, there are various types of explosion protection, including flameproof, intrinsic safety, increased safety, positive pressure, and encased, etc. Intrinsic safety is just one type of explosion-proof design. Equipment utilizing this type of protection is used in flammable and explosive environments, as it limits the working voltage, current, capacitance, and inductance. Even if sparks occur within the circuit, they are not sufficient to ignite the surrounding flammable and explosive atmosphere, ensuring intrinsic safety. Intrinsic safety certification is widely used for low-power, low-energy instruments, handheld terminal products, and more.
Coal mine safety certification is a mandatory product certification for equipment used underground in coal mines. Due to the presence of dangerous substances like gas underground, electrical equipment used in coal mines must implement protective measures to achieve explosion-proof performance. Suitable explosion-proof protection types, such as intrinsic safety, flameproof, and encapsulation, can be selected based on product structure, electrical parameters, installation methods, and usage areas. It is noteworthy that electrical equipment applying for coal mine safety certification not only needs to have explosion-proof capabilities but also must meet performance tests for the special environment of coal mine underground.
Shenzhen ZhongNuo Testing Technology Co., Ltd. has long specialized in explosion-proof certification and coal safety certification. We are well-versed in certification standards and the explosion-proof design, rectification, testing, certification, and factory audit processes and requirements for products. We can help businesses quickly obtain explosion-proof and coal safety certifications.

Domestic explosion-proof certification models are divided into three categories -- Shenzhen Zhongnuo Testing Technology Co., Ltd.
1.防爆Certification System
Applicable Products: Electrical and non-electrical equipment used in areas with explosive gases and dust, not for mining purposes (except for products listed in the Explosion-Proof 3C Catalogue)
Certification Model: Product Testing
Certification Certificate: Explosion-proof Compliance Certificate
Certificate Validity: 5 years
Annual Audit Required: No
2. Explosion-proof 3C Certification System
Applicable Products: Electrical Equipment listed in the防爆3C Directory
Certification Model: Combination of Type Testing and Factory Audit
Certification Certificate: CCC Certificate
Certificate Validity: 5 years
Is Annual Audit Required: Annual Audit Required
3. Coal Safety/Mine Safety Certification System
Applicable Products: Various electrical and non-electrical equipment for use in both coal and non-coal mines.
Certification Model: Combination of Type Testing and Factory Audit
Certification Certificate: Mine Product Safety Mark Certificate
Certificate Validity: 5 years
Is Annual Audit Required: Annual Audit Required

Sample requirements for explosion-proof certification application:
The sample machine submitted by the company should match the approved drawings and be fully assembled; the number of units inspected should meet the requirements.
If special disassembly tools are required, they should be sent along with the shipment.
For potting-type electrical equipment, a set of both potted and unpotted products should be submitted.
The transparent components for the observation window should be sent separately with at least 3 pieces, additional 5 pieces required.
The transparent parts of the lighting fixtures should be sent separately with at least 5 pieces, total of 8.
Rubber aging tests should provide 3 to 5 pieces of 35156 rubber blocks.
Two plastic sheets with a diameter of 15060mm are required for the insulation resistance test of the plastic shell. If the size permits, the test can be directly conducted on the plastic shell.
1-2 finished products are generally required.
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.