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.
Explosion-proof Certification Categories -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
Electrical equipment for explosive gas environments:
Explosion-proof type d
(2) Intrinsically Safe Type e
Type 3 (intrinsically safe)
(4) Positive Pressure Type P
(5) Immersion Type
(S6) Sand-filled type q
(7) Cast-in-place
(N) Type
2. Electrical Equipment for Combustible Dust Environments
Dust-Proof Ignition-Resistant Enclosure
(2) Positive Pressure Type
(3) Intrinsically Safe
(4) Cast-in-place
3. Intrinsically Safe Type S
4. Composite:防爆型式 that combines two or more of the aforementioned types

List of Domestic Explosion-Proof Certification Agencies:
1. Nanyang CNEX
2. Shanghai Coal Research Institute
3. National Electrical Appliance Quality Supervision and Inspection Center
4. Guangdong CQCEx National Explosion-Proof Equipment Quality Supervision and Inspection Center
5. National Coal Mine Explosion-Proof Safety Product Quality Supervision and Inspection Center
6. Jiamusi Explosion-Proof Institute
7. Tianjin PCEC
8. Shanghai NEPSI
9. Beijing Coal Research Institute CCRI, etc.
For applicants, what type of explosion-proof and what level of explosion-proof to apply for is actually the same across all authorized institutions. They are all institutions that have been certified and authorized by the state, with testing conditions that meet standard requirements, adhering to the same standards, and conducting the same testing. Under the same conditions, choosing an institution that offers services at more affordable prices has become an inevitable trend, which is also an important reason why emerging explosion-proof enterprises are increasingly popular.

What are the requirements for enterprises to apply for explosion-proof certification -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
For businesses, applying for a domestic explosion-proof certificate does not impose special requirements on enterprises (except for the explosion-proof 3C certification).
Primarily, it's to check if the product meets the explosion-proof standards and to see the available documentation.
If the product falls under the explosion-proof 3C certification category, the applicant company is required to have a production facility (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 production facility is required.

What products can apply for the intrinsically safe explosion-proof certification? What are the requirements?
"Benan is one type of explosion-proof protection, which limits electrical energy so that the equipment can still function even in the event of a fault."
This type of explosion-proof protection produces insufficient energy to ignite the surrounding explosive environment.
Therefore, intrinsic safety requirements limit the current, voltage, capacitance, inductance, etc., of electrical equipment, making them suitable only for low-power devices.
At the same time, there are specific requirements for the power supply method of intrinsic safety equipment, plastic casings, and wireless transmission.
The product application for intrinsic safety certification requires the submission of the product's schematic, PCB diagram, and other relevant documents.
Zhenuo Inspection has dedicated engineers specializing in intrinsically safe circuit and structural design.
We offer technical consulting services for explosion-proof circuit design, drafting, and modification. We have extensive experience in designing and obtaining certifications for intrinsically safe ia, ib, and ic explosion-proof ratings.
If you require certifications in this area, feel free to message us!
explosion-proof certification application consulting service - Shenzhen Zhongnuo Testing Technology Co., Ltd.