Shenzhen ZhongNuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal mine safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
Why do companies need explosion-proof certification?
Blastproof certification refers to the process of determining if equipment meets blastproof standards, requiring type tests and issuance of relevant certificates of compliance, primarily targeting Ex equipment or Ex components. Blastproof products generally refer to blastproof electrical products: electrical products or components with blastproof functions designed for environments where explosions of gases or dust may occur, capable of igniting surrounding explosive atmospheres under specified conditions.
Safety of explosion-proof equipment is closely related to safe production, which is why many countries implement explosion-proof certification for electrical products. Explosion-proof products must obtain the certification before they can be used in hazardous flammable or explosive areas. The #explosion-proof certification# is essential for ensuring the safe use of explosion-proof electrical products.
Blast-proof certification can boost product exports and further enhance the credibility and reputation of companies and products, increasing market competitiveness. Companies requiring certification can obtain it domestically.

How to differentiate between II and III explosion-proof certificates?
Explosion-proof electrical equipment is divided into various categories based on the application site, such as Class I explosion-proof certification, Class II explosion-proof certification, and Class III explosion-proof certification, etc.
We are referring to the Type I explosion-proof certification, which is a certification for underground coal mine equipment, typically used in conjunction with the coal safety certificate for the equipment.
Ⅱndustrial hazardous area certificate refers to the certification for explosion-proof equipment used in non-mining explosive gas environments, such as facilities in petrochemicals, gas, and oil depots.
Type III explosion-proof certificate refers to the certification for explosion-proof equipment used in non-mining explosive dust environments, such as equipment used in painting, sanding, feed, food, and other applications.
The distinction between Class I, Class II, and Class III explosion-proof certificates primarily lies in the different locations where the equipment is used.
The domestic explosion-proof certification standards are primarily based on the GB/T3836 series. The original GB12476 (dust) and GB25286 (non-electrical) series standards have also been merged into GB/T3836.

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 design to choose and what level of explosion-proof to pursue is actually the same across all authorized institutions. They are all certified and authorized by the state, with testing conditions that meet the required standards, adhering to the same standards and conducting the same testing. Under the same conditions, the trend is inevitable to opt for institutions that offer the same services at more economical prices. This is also a significant reason for the growing popularity of emerging explosion-proof enterprises.

What testing items are included in the explosion-proof certificate, and what are the requirements?
Explosion-proof is one of the most commonly used explosion-proof types for market explosion-proof products, adhering to the standards GB/T 3836.1 and GB/T 3836.2.
Explosion-proof is mainly achieved through the protection of a隔爆外壳.
The explosion-proof housing must have adequate thickness and strength; even in the event of an explosion inside the equipment, the flame will be extinguished due to the width, gap, and roughness of the housing's mating surfaces, preventing ignition of the external hazardous environment.
On the other hand, even in the event of an explosion in a hazardous area outside, the explosion-proof housing maintains its anti-explosion properties.
In summary, the housing is both explosion-proof and shockproof. Consequently, the equipment is rather bulky.
ZhongNuo 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.
Extensive experience in the design and modification guidance for explosion-proof products, offering services such as explosion-proof housing design, drafting, certification, and drawing preparation.
If you have a certification need for this, remember to message us!
Explosion Proof Certification Application Consulting Services - Shenzhen Zhongnuo Testing Technology Co., Ltd.