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.
Flammability Dust Environment Explosion Proof Certification Standard:
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 encapsulation
GB/T 3836.31-2021 Explosive Atmospheres Part 31: Equipment protected by dust-protection enclosures “t”

How to differentiate between Class II and Class III explosion-proof certificates?
Explosion-proof electrical equipment is classified into different 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 I-Type explosion-proof certification, which is a certification for underground coal mine equipment, typically used in conjunction with the coal safety certificate for the equipment.
Class II explosion-proof certificate refers to the certification for explosion-proof equipment used in non-mining explosive gas environments, such as equipment used in petrochemical, gas, and oil storage facilities.
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 facilities.
The distinction between Class I, Class II, and Class III explosion-proof certificates primarily lies in the different application locations of the equipment.
The current domestic explosion-proof certification standards are mainly based on the GB/T3836 series. The original GB12476 (dust) and GB25286 (non-electrical) series standards have also been merged into GB/T3836.

Do I need to do a explosion-proof design before applying for the explosion-proof certification of the product?
This is definite.
The product undergoes explosion-proof certification, which is the process of passing relevant explosion-proof standard tests and obtaining an explosion-proof qualification certificate.
To ensure the product passes the explosion-proof standard test items, it is definitely necessary to design the product according to the test requirements, which means implementing explosion-proof design.
For explosion-proof requirements, refer to GB/T3836.1 and GB/T3836.2; for intrinsically safe designs, consult GB/T3836.1 and GB/T3836.4; and for positive pressure designs, refer to GB/T3836.1 and GB/T3836.5.
If your equipment is looking to apply for explosion-proof certification and enter the explosion-proof market, private message us right away! ZhongNuo Inspection has been deeply involved in the explosion-proof field for many years, familiar with the technical requirements of GB/T3836, EN/IEC60079 explosion-proof standards, and offers explosion-proof product rectification and design guidance, as well as a one-stop explosion-proof technical solution.

Explosion-proof Certification Categories -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
Blastproof certification is the process of verifying that equipment meets the requirements of blastproof standards, type testing, and routine tests, and issuing the relevant qualification certificates. Certificates can be issued for Ex equipment or Ex components.
Different regions have varying certification standards and systems for explosion-proof electrical products. Currently, international explosion-proof certifications include domestic explosion-proof certification, ATEX certification, IECEx certification, and North American explosion-proof certification, among others.
Explosion-proof Certification Application Consultancy Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.