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.
Blastproof certification is the process of determining that equipment meets the requirements of explosion-proof standards, type tests, and appropriate routine tests, and issuing the relevant qualification certificates.
Certificates are available for Ex equipment or Ex components.
The explosion-proof standard GB/T3836 specifies that electrical equipment manufactured in accordance with the explosion-proof type standards listed in GB/T3836.
All must be sent to authorized national institutions for防爆testing in accordance with the relevant standards and obtain a防爆certificate of compliance.
This means that explosion-proof products must obtain the relevant explosion-proof certification.

Explosion-proof Certification Categories -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
Electrical equipment for explosive gas atmospheres
Explosion-proof type d
Ex-proof type e
(3) Intrinsically Safe i
(4) Positive Pressure Type P
(5) Immersion-type
(6) Sand-filled Type q
(7) Cast-in-place
(n) Type N
2. Electrical Equipment for Combustible Dust Environments
Dust-Proof Ignition-Resistant Enclosure
(2) Positive Pressure Type
(3) Intrinsically Safe
(4) Cast-in-place
3. Explosion-proof type S
4. Compound Type:防爆类型 that combines two or more of the aforementioned explosion-proof types

Intrinsically Safe and Explosion-Proof certification are two common types of different explosion-proof protection, differing fundamentally in their explosion-proof principles, primarily in the following aspects:
Explosion-proof certification typically involves using explosion-proof casings for protection. These casings must have sufficient thickness and strength, as even if an explosion occurs inside the equipment, the flame will be extinguished due to the width, gap, and roughness of the casing's joint surfaces, thereby igniting the external hazardous environment. On the other hand, even if an explosion occurs in the external hazardous area, the explosion-proof casing exhibits anti-explosion properties. In summary, explosion-proof casings can withstand and resist explosions, but the equipment may be rather heavy.
The intrinsic safety certification, also known as inherent safety certification, is achieved by limiting circuit energy, ensuring that even in the event of an anticipated fault, the energy produced is not sufficient to ignite surrounding explosive substances. This achieves inherent safety. Therefore, intrinsic safety products have higher requirements for device circuits and operating power, and are generally suitable for handheld devices and low-power products.
Additionally, there is a composite explosion-proof certification. This indicates that the product cannot achieve explosion-proof with a single type of explosion-proof design; it must incorporate two or more types. For instance, explosion-proof equipment with antennas, where the antenna section is typically intrinsically safe, such equipment is both explosion-proof and intrinsically safe. However, it is important to note that composite explosion-proof products do not necessarily mean the product must meet all the requirements of different explosion-proof types simultaneously, nor does the explosion-proof level necessarily exceed that of a single type. The explosion-proof level of the product mainly depends on the gas/dust category, temperature group, and equipment protection level.
For more information on explosion-proof certifications such as intrinsic safety and flameproof, please feel free to consult Shenzhen ZhongNuo Testing Technology Co., Ltd. at any time.

North American Explosion Proof Certification
North American Explosion Proof Certification System (hereinafter referred to as NEC [National Electrical Code] system)
Classification of explosive materials, division of hazardous areas, explosion-proof protection methods,
There is a significant difference between the installation and wiring standards and the explosion-proof certification system supported by our national standard system (hereinafter referred to as the GB system).
Currently, North American explosion-proof certification is divided into two major systems: Division and Zone. The Division system uses the explosion-proof marking native to the United States.
The Zone system adopts explosion-proof standards consistent with the IEC system.
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.