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 a one-stop explosion-proof technology consulting service.
The cost of obtaining explosion-proof certification at Shenzhen Zhongnuo Testing Technology Co., Ltd. is related to the following aspects:
1. Do you require a防爆certification or a防爆3C certification? If a防爆3C certification is needed, a factory audit is mandatory, which includes the audit fee, travel expenses for the auditor, and the applying fee and Certificate fee for the 3C certificate.
2. Related to explosion-proof markings. Different explosion-proof markings have different explosion-proof items, and naturally, the costs vary accordingly.
3. Domestic explosion-proof certification or international explosion-proof certification? The same explosion-proof mark, 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 to retest? Some customers' products have never been designed for explosion-proof, and they still need to go through rectification, which adds to the cost. If the product includes a battery, battery testing is also an additional expense, especially for those batteries that always fail the tests.
5. Needed? The labs are often booked up, and there are often waiting times. If required, there will be a fee involved.

What are common misconceptions about explosion-proof certification?
The explosion-proof grade is not the higher, the better.
Explosion-proof ratings are related to product structure and installation locations. Choose the appropriate one. Of course, as long as the product structure meets the requirements, the higher the explosion-proof rating, the broader the applicable range.
2. Explosion-proof rating is not equivalent to protection rating.
The protection grade is commonly referred to as the IP rating, which is different from the explosion-proof grade.
3. The combination of temperatures is not the higher, the better; instead, the lower, the safer.
Temperature combinations T6 (85°C), T5 (100°C), T4 (135°C), T3 (200°C), T2 (300°C), T1 (450°C) indicate the high surface temperatures achieved 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 environments, and conversely, dust explosion-proof certificates cannot be used in gas environments.
5. It's sufficient for a flameproof certification in underground coal mines.
Wrong. Electrical equipment for underground coal mines requires coal safety certification, with the frequent agency being the Safety Standardization Center.
Explosion-proof certification is exclusively for facilities where explosive gases and dust are used in non-coal mine underground areas. If the product is listed in the explosion-proof CCC catalog, it requires an explosion-proof 3C certification.

Flameproof protection level Ex db eb, is it higher than Ex db?
Composite explosion-proof marking indicates that a single explosion-proof type is insufficient for the product's explosion-proofing, and it requires the use of two or more explosion-proof types.
For example, explosion-proof equipment with antennas, the antenna section is typically intrinsically safe treated; this equipment is both explosion-proof and intrinsically safe.
Additionally, the nozzle part of the oiler typically belongs to Zone 0, which can only be made intrinsically safe (ia). Other parts can be made into Zone 1, allowing for intrinsically safe (ib) or explosion-proof designs.
Composite explosion-proof products do not mean that the product must meet all requirements of different explosion-proof types simultaneously, nor does it imply that the explosion-proof level of composite explosion-proof types is necessarily higher than that of single explosion-proof types.
The key to determining the explosion-proof level of a product is mainly the gas/dust combination, temperature group, and equipment protection level.
Gas Mixture: II-C > II-B > II-A
Dust Composition: ⅢC > ⅢB > ⅢA
Temperature Grades: T6 > T5 > T4 > T3 > T2 > T1
Equipment Protection Combination: Ga > Gb > Gc, Da > Db > Dc
For more details, please contact Shenzhen ZhongNuo Testing Technology Co., Ltd. directly!

Does a product need to have an explosion-proof design before applying for an explosion-proof certification?
That's for sure.
The product's explosion-proof certification process involves passing relevant test items of the explosion-proof standards to obtain an explosion-proof qualification certificate.
To ensure the product passes the explosion-proof standard test items, it is necessary to design the product according to the test requirements, which is to say, to implement explosion-proof design.
For explosion-proof requirements, refer to GB/T3836.1 and GB/T3836.2; for intrinsic safety design, consult GB/T3836.1 and GB/T3836.4; for positive pressure design, 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 and EN/IEC60079 explosion-proof standards, offering explosion-proof product rectification and design guidance, as well as a one-stop explosion-proof technical solution.
explosion-proof certification application consulting service - Shenzhen ZhongNuo Testing Technology Co., Ltd.