Zhengzhou GB Explosion-proof Certification Applicable Standards

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.
Do I need a Coal Safety Certificate if the product already has an explosion-proof certificate?
The explosion-proof certificate and coal safety certificate are applicable to different locations.
Explosion-proof certificates generally refer to facilities where explosive gases and dust are present, excluding underground coal mines.
Coal Mine Safety Certificate refers to the safety certification mark for equipment and products used underground in coal mines.
So, whether to apply for a explosion-proof certificate or a coal safety certificate depends on where the product is used. If it's only used in non-coal mine explosive gas and dust environments, an explosion-proof certificate is sufficient. If it's also used underground in coal mines, a coal safety certificate is mandatory, and they are mutually exclusive.
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What is a Explosion-Proof Certificate of Conformity? What are the requirements for applying for an Explosion-Proof Certificate of Conformity?
Intrinsically safe equipment primarily meets explosion-proof requirements by controlling the electrical parameters of the device circuit and limiting the entire circuit's energy.
Key measures include reducing voltage and current, and controlling parameters of energy storage components such as inductors and capacitors.
The product design reference standards are GB/T3836.1 and GB/T3836.4.
Customers applying for explosion-proof certification need to provide electrical schematics, block diagrams, PCB layouts, and tag number diagrams.
Product assembly diagrams, manuals, corporate standards, and other documentation.
Recently, China Nuowei Inspection has secured temperature vibration sensors, remote transmitters, monitoring devices, and Bluetooth beacons for our clients.
The explosion-proof certificates for walkie-talkies and other products are all of intrinsic safety type explosion-proof designs.
If you also have products that require explosion-proof certification, feel free to message us!

What are the requirements for enterprises to apply for explosion-proof certification -- Shenzhen Zhongnuo Inspection Technology Co., Ltd.
For enterprises, applying for a domestic explosion-proof certificate does not impose any special requirements on the company (except for the explosion-proof 3C certification).
Primarily, it's to check if the product meets the explosion-proof standards and whether the required certification documents can be provided.
If the product falls under the explosion-proof 3C certification category, the applicant must have a production factory (OEM/ODM is also acceptable).
Because the explosion-proof 3C certification is a certification model that employs both type testing and factory inspection.
In addition to product testing, an annual inspection of the manufacturing facility is required.

What are common misconceptions about applying for explosion-proof certification for products?
The explosion-proof grade is not the higher, the better.
The explosion-proof rating is related to product structure, installation method, usage location, etc. Choose the appropriate one. Of course, as long as the product structure meets the requirements, the higher the explosion-proof rating, the wider the applicable range.
2. Explosion-proof rating is not the same as protection rating.
The protection rating, commonly referred to as the IP rating, is different from the explosion-proof rating.
3. The lower the temperature range, the safer it is, rather than the higher the better.
The temperature group indicates the high surface temperature reached by the equipment under adverse conditions. In explosive hazardous areas, of course, the lower the high surface temperature of the equipment, the safer it is.
4. Gas explosion-proof certificates cannot be used in dust areas, and conversely, dust explosion-proof certificates cannot be used in gas areas.
5. Explosion-proof is safer than intrinsic safety. Many clients believe that having an explosion-proof enclosure makes it safer than intrinsic safety, but this is a misconception. These are different types of explosion protection, both can achieve explosion prevention. What's suitable for the product structure and environment is safe.
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Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.