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 a one-stop explosion-proof technology consulting service.
Explosive-proof certification standards for combustible dust environments:
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 enclosure "p"
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by "m" type enclosures
GB/T 3836.31-2021 Explosion-proof Environment, Part 31: Equipment protected by dust ignition-proof enclosures "t"

What products can apply for the intrinsically safe explosion-proof certification? What are the requirements?
"BA ( intrinsic safety) is one of the many explosion-proof protection types, which involves limiting electrical energy so that equipment remains safe even in the event of a fault."
A type of explosion-proof protection that the energy produced is not sufficient to ignite the surrounding explosive environment.
Therefore, intrinsic safety requirements impose limitations on the current, voltage, capacitance, inductance, etc., of electrical equipment, making it only suitable for low-power devices.
Additionally, there are specific requirements for the power supply method of intrinsically safe equipment, plastic enclosures, and wireless transmission.
The product application for intrinsic safety certification requires submission of the product's schematics, PCB layouts, etc.
ZhongNuo Inspection has dedicated engineers specializing in intrinsically safe circuit and structural design.
We offer technical consulting services for explosion-proof circuit design, drafting, and modifications. We have extensive experience in designing and obtaining certifications for intrinsically safe ia, ib, and ic explosion-proof classifications.
If you require certifications in this area, feel free to send us a private message!

Domestic explosion-proof certification models are divided into three scenarios -- 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 Mode: Product Testing
Certification Certificate: Explosion-Proof Compliance Certificate
Certificate Validity: 5 years
Annual Audit Required: No
2. Intrinsically Safe 3C Certification System
Applicable Products: Electrical Equipment listed in the Explosion-Proof 3C Catalog
Certification Mode: 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 Mode: Combination of Type Testing and Factory Audit
Certification Certificate: Mine Product Safety Mark Certificate
Certificate Validity: 5 years
Whether Annual Audit: Audited Annually

IECEx Certification
IECEx is a certification system for explosion-proof electrical products promoted by the International Electrotechnical Commission (IEC), aimed at eliminating discrepancies in equipment and services used in explosive environments, promoting international trade, while maintaining the level of safety requirements. The current explosion-proof standard is IEC 60079. IECEx certification has become a route for products used in all hazardous areas to obtain international safety certification, and is currently recognized in many parts of the world (including Australia, New Zealand, Brazil, Canada, China, Japan, South Korea, Malaysia, Singapore, South Africa, the United States, etc.). Certificates issued by IECEx are automatically uploaded to the IECEx website, where manufacturers and end-users can find relevant documents.
Explosion-proof Certification Application Consultation Services - Shenzhen Zhongnuo Testing Technology Co., Ltd.