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 you need to have a flameproof design before applying for a flameproof certification for the product?
That's a given.
The process of obtaining an explosion-proof certification for products involves passing the 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; and 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, reach out to us via private message right away! ZhongNuo Inspection has been deeply involved in the explosion-proof field for many years, well-versed in 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 Categories -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
Electrical equipment for explosive gas environments:
Explosion-proof type d
(2) Increased safety type e
(3) Intrinsically Safe i
(4) Positive Pressure Type P
(5) Immersion Type
(6) Sand-filled type q
(7) Cast-in-place
(8) N-type
2. Electrical Equipment for Combustible Dust Environments
Dust-Proof Ignition-Resistant Enclosure
Positive Pressure Type
(3) Intrinsically Safe
(4) Cast-in-place
3. Explosion-proof type S
4. Composite Type: Explosion-proof type with a combination of two or more of the above-mentioned explosion-proof types

Why choose tempered glass for explosion-proof transparent parts?
Transparent components are an essential material for explosion-proof electrical equipment. When selecting transparent components, customers often ask what material should be used? Is glass acceptable? Can plastic be used?
Below, Shenzhen Zhongnuo Testing Technology Co., Ltd. explains to you.
GB/T3836.1 clearly stipulates the thermal shock test for transparent parts, which is designed to verify the thermal stability of glass under rapid cooling conditions. Currently, toughened glass is a material that not only meets this requirement but also offers high cost-performance.
普及 the fact that tempered glass, after being heated and then cooled, forms an even layer on the surface.
The compressive stress layer counteracts the tensile stress generated on the surface during rapid cooling. Therefore, even when subjected to stress from rapid cooling, qualified tempered glass will have a compressive stress layer to offset its effects.

What is the relationship between the explosion-proof certificate and the explosion-proof CCC certification?
The explosion-proof certificate and the explosion-proof 3C certification are for different types of explosion-proof products.
Explosion-proof 3C Certification is for products listed in the Explosion-proof 3C Catalog. There is a dedicated product catalog for Explosion-proof 3C. Products within the catalog must obtain the Explosion-proof 3C Certification, which involves a "Product Testing + Factory Audit" approach, requiring both type testing of the product and an on-site factory audit.
Ex-proof certificate is applicable to products not listed in the Ex-proof 3C Catalogue. The certification model involves product testing; once the product passes the testing, an Ex-proof certificate can be issued frequently.
Of course, products outside the explosion-proof 3C catalog can also apply for explosion-proof certificates, but there is a risk of being penalized by market supervision. This is something for the client to consider on their own.
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.