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.
Domestic explosion-proof certification modes are categorized into three scenarios -- Shenzhen Zhongnuo Testing Technology Co., Ltd.
1. Explosion-proof certificate system
Applicable Products: Electrical and non-electrical equipment used in places with explosive gases and dust, excluding those for mining purposes (products not 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
Annual Audit Required: Yes, an annual audit is required.
3. Coal Safety/Mining Safety Certification System
Applicable Products: Various electrical and non-electrical equipment for use in both coal and non-coal mines underground
Certification Model: Combination of Type Testing and Factory Audit
Certification Certificate: Mining Product Safety Mark Certificate
Certificate Validity: 5 years
Annual Audit: Yes, an annual audit is conducted.

Does a product with an explosion-proof certificate still need a coal safety certificate?
The explosion-proof certificate and coal safety certificate are applicable to different locations.
Intrinsically Safe Certificate typically refers to facilities used in environments with explosive gases and dust, excluding coal mine shafts.
Coal Mine Safety Certificate refers to the safety certification mark for equipment and products used underground in coal mines.
So, whether to apply for an explosion-proof certificate or a coal safety certificate depends on where the product is used. If it's only used in explosive gas and dust places that are not in coal mines, an explosion-proof certificate is sufficient. However, if it's also used underground in coal mines, a coal safety certificate is mandatory, and they are not interchangeable.
Learn more details by sending a private message to Shenzhen ZhongNuo Inspection Technology Co., Ltd.!

Why Do Companies Need Explosion-Proof Certification?
Blastproof certification refers to the process of verifying that equipment meets blastproof standards, requiring type tests and the issuance of relevant qualification certificates, 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 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 systems for electrical products. Explosion-proof products must obtain certification before they can be used in hazardous flammable environments. 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 the company and its products, increasing market competitiveness. Companies in need of certification can obtain blast-proof certification domestically.

Is the explosion-proof grade Ex db eb higher than Ex db?
Composite explosion-proof marking indicates that a single explosion-proof type is not sufficient for this product and that two or more explosion-proof types must be used.
For example, explosion-proof equipment with antennas, the antenna part is usually intrinsically safe treated, making this device both explosion-proof and intrinsically safe.
Additionally, the nozzle part of the oiler typically 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 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 main factor to consider when evaluating a product's explosion-proof rating is the gas/dust combination, temperature group, and equipment protection level.
Gas Mixture: II-C > II-B > II-A
Dust Composition: ⅢC > ⅢB > ⅢA
Temperature Grades: 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!
Explosion-proof Certification Application Consultancy Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.