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.
Division of explosion-proof areas in flammable dust environments -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
In explosion-proof certification, hazardous areas are divided into explosive gas environments and combustible dust environments based on the different physical states of substances present in the location. According to the duration of presence of the hazardous substances in the location, the hazardous areas under the two different physical states are further divided into three zones.
For environments with combustible dust, it is designated as Zones 20, 21, and 22.
Areas with continuous or long-term presence of flammable dust, typically above 1000 hours per year.
Area 21 - Locations where flammable dust environments may occur during normal operation are generally 10-1000 hours/year.
Zone 22 - Under normal operation, flammable dust atmospheres are unlikely to occur or are only occasionally present for short periods, generally less than 10 hours per year.

Blast-proof certification is the process of determining if equipment meets the requirements of blast-proof standards, type testing, and appropriate routine tests, and issuing relevant qualification certificates.
Certificates are available for Ex equipment or Ex components.
The explosion-proof standard GB/T3836 specifies that electrical equipment trial-produced by manufacturers according to 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.

Is "Intrinsically Safe Certification" the same as explosion-proof certification? What are the differences between them?
Blastproof certification refers to a safety certification for equipment and products used in explosive hazard areas.
Products must take certain measures to meet the requirements of explosion-proof certification standards; we refer to these as explosion-proof protection types.
Common explosion-proof protection types include intrinsic safety, flameproof, positive pressure, and increased safety, etc.
Clearly, intrinsically safe is just one type of explosion-proof protection.
Different explosion-proof protection types have varying design requirements for the product.
Intrinsically safe design limits electrical energy, ensuring that even in the event of a fault,
A type of explosion-proof protection that the generated energy is not sufficient to ignite the surrounding explosive environment.
Therefore, intrinsic safety requirements limit the current, voltage, capacitance, inductance, etc., of electrical equipment, and are generally suitable for low-power devices.
At the same time, there are clear requirements for the power supply method of intrinsic safety equipment, the material of the housing, and wireless transmission.
As a long-standing third-party consulting firm specializing in explosion-proof certification.
ZhongNuo Inspection has dedicated engineers specializing in intrinsic safety circuit and structural design.
We offer technical consulting services for explosion-proof circuit design, drafting, and modifications. We have extensive experience in designing and obtaining certifications for intrinsic safety levels ia, ib, and ic.
If you require certifications in this area, feel free to send us a private message!

Can fiber optic temperature sensing products undergo explosion-proof certification? What are the requirements?
Fiber optic temperature measurement products primarily monitor temperature through sensing fibers, offering high accuracy, immunity to electromagnetic interference, and real-time online capabilities.
If this fiber optic is emitted into an explosive hazardous area, the possibility of the light causing an explosion must be considered.
We'll also need to consider obtaining explosion-proof certification. The execution standards for explosion-proof certification of fiber optic temperature measurement products are GB/T 3836.1 and GB/T 3836.22.
Primarily, it concerns the product's circuitry and the laser generator's emission power.
Shenzhen ZhongNuo Inspection has successfully obtained multiple explosion-proof certifications and coal safety approvals for clients in the field of fiber optic temperature measurement hosts.
We boast extensive experience in certification, offering services such as explosion-proof product design modifications, drawing guidance, and certification consulting to our clients.
If you have a certification need for this, remember to message us!
explosion-proof certification application consulting service - Shenzhen Zhongnuo Testing Technology Co., Ltd.