Shenzhen Zhongnuo Inspection 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.
Domestic explosion-proof certification
Domestic explosion-proof certification is a compliance inspection for explosion-proof products used in explosive environments (including electrical and non-electrical products), issuing explosion-proof certificates for products that meet the GB/T3836 standard. Currently, the domestic explosion-proof certification standards are basically equivalent to the international IEC 60079 standard system.

What is the difference between corrosion protection level, protection level, and explosion-proof certification level?
Many corporate clients are often confused about the corrosion resistance, protection class, and explosion-proof certification levels required for their products.
Due to the mere one-character difference in names, and both referring to a specific grade of the product, they are similar yet distinct. So, what are the differences between them?
Corrosion prevention involves measures taken to protect metals prone to rust, with the aim of extending their service life. Typically, methods such as physical, chemical, and electrochemical corrosion prevention are employed. There are five common levels: indoor F1, F2, and outdoor WF, WF1, and WF2.
Protection rating, commonly known as IP rating, refers to the dust and water resistance level of the equipment, typically consisting of "IP" followed by two digits.
The explosion-proof grade generally refers to the certification level of the equipment's explosion-proof rating. Each electrical equipment applying for an explosion-proof certification will have a corresponding explosion-proof marking, including the type of explosion-proof and the explosion-proof grade. The explosion-proof grade indicates the product's applicable explosion-proof area, gas/dust group, temperature group, and equipment protection level, etc.
Clearly, these are different concepts from different fields. For more information, feel free to send us a private message anytime!

The cost of obtaining explosion-proof certification at Shenzhen Zhongnuo Testing Technology Co., Ltd. is related to the following aspects:
1. Do you need an explosion-proof certificate or an explosion-proof 3C certification? For the 3C certification, a factory audit is required, which includes the audit fee, travel expenses for the auditor, the application fee for the 3C certificate, and the certificate fee.
2. Related to explosion-proof markings. Different explosion-proof markings correspond to different explosion-proof items, and naturally, the costs vary accordingly.
3. Domestic explosion-proof certification or international explosion-proof certification? The same explosion-proof marking, ATEX/IECEx certification is much more expensive than the domestic explosion-proof certificate, and it also requires factory audit. North American explosion-proof certification is even more expensive, over 100,000+
4. Do you need a retest? Some customers' products haven't even been designed for explosion-proof, and they still need to be modified, which adds to the cost. If the product includes a battery, battery testing is also an additional expense, especially for those batteries that keep failing the tests.
5. Needed or not. Labs are often booked solid, often requiring a waitlist. If needed, there will be a fee involved.

What test items are required to apply for an explosion-proof certification?
Explosive-proof products require passing relevant testing requirements of the explosive-proof standards to obtain an explosive-proof certification.
Different explosion-proof types, catering to equipment used in various explosive environments, require different explosion-proof testing items.
Many customers also want to know what types of tests are required for explosion-proof products? What specific requirements are there for the explosion-proof design of the product?
Let's first give examples of common explosion-proof testing items.
For instance, safety-intrinsic products typically include tests such as appearance and structure inspection, spark ignition tests, dielectric strength, battery and battery pack testing, temperature rise tests, and transient energy tests.
Main test items for explosion-proof products include heat and cold resistance tests, internal ignition without propagation of explosion, shell pressure resistance, IP testing, temperature rise tests, etc.
Different test items, catering to different modules or components of the product.
Each test item ensures that the product meets the explosion-proof standards and achieves the required explosion-proof performance.
If a company is designing explosion-proof products and is unaware of the explosion-proof standards requirements,
ZhongNuo Inspection can provide guidance services for explosion-proof circuit design and explosion-proof structural design, including explosion-proof standards, design key points, drawing guidance, etc.
And can act as an agent for explosion-proof testing and certification services.
Need this service? Feel free to message us anytime!
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.