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.
Certification standards for explosion-proof equipment used in environments with explosive gas:
GB/T 3836.1-2021 Explosive Atmospheres Part 1: Equipment General Requirements
GB/T 3836.2-2021 Explosive Atmospheres, Part 2: Equipment protected by explosion-proof enclosures "d"
GB/T 3836.3-2021 Explosive Atmospheres, Part 3: Equipment protected by an "e" type of increased safety
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 an "p" pressure-proof enclosure
GB/T 3836.6-2017 Part 6: Equipment protected by liquid immersion of type “o” for explosive atmospheres
GB/T 3836.7-2017 Explosive Atmospheres, Part 7: Equipment protected by filling with sand type “q”
GB/T 3836.8-2021 Explosive Atmospheres Part 8: Equipment protected by "n" type protection
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by "m" type encapsulation

Why Do Companies Need Explosion Proof Certification?
Blast-proof certification refers to the process of confirming that equipment meets blast-proof standards, requiring the issuance of relevant qualification certificates after type testing. It primarily targets Ex equipment or Ex components. Blast-proof products generally refer to blast-proof electrical products: electrical products or components with blast-proof functions that can ignite surrounding explosive environments under specified conditions in environments where explosions may occur due to gases or dust.
Safety of explosion-proof equipment is closely related to safe production, which is why many countries implement explosion-proof certification systems for explosion-proof electrical products. Explosion-proof products must obtain an explosion-proof certification before they can be used in flammable and explosive hazardous 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 competitiveness of the company and its products. Companies in need of certification can obtain it domestically.

List of Domestic Explosion-Proof Certification Institutions:
1. Nanyang CNEX
2. Shanghai Coal Research Institute
3. National Electrical Product 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 choose 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, the trend is to choose institutions that offer more affordable services at a lower price, which is also a significant reason for the increasing popularity of emerging explosion-proof enterprises.

Flameproof Category Ex db eb, is it higher than Ex db?
Composite explosion-proof marking indicates that a single explosion-proof type is not sufficient for this product, and it is necessary to use two or more explosion-proof types.
For example, explosion-proof equipment with antennas, where the antenna section is typically intrinsically safe. This device is 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 necessarily mean that the explosion-proof grade of composite explosion-proof types is always higher than that of single explosion-proof types.
The primary factor in determining a product's explosion-proof rating is the gas/dust combination, temperature group, and equipment protection level.
Gas Mixture: ⅡC > ⅡB > ⅡA
Dust Combination: III-C > III-B > III-A
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 Consulting Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.