Shenzhen Zhongnuo Inspection & Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal mine safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
Do I still 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 used in places where explosive gases and dusts are present, excluding underground coal mines.
Coal Safety Certificate refers to the safety certification mark for equipment and products used in underground coal mines.
So, whether to apply for an 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. However, if it's also used underground in coal mines, a coal safety certificate is required, and the two are not interchangeable.
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What are the requirements for a company to apply for explosion-proof certification? -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
For businesses, applying for a domestic explosion-proof certificate imposes no special requirements on the company (except for the explosion-proof 3C certification).
Primarily, it's to check if the products meet the explosion-proof standards and whether you can provide the relevant certification documents.
If the product falls under the explosion-proof 3C certification directory, the applicant must have a production factory (OEM/ODM is also acceptable).
Because the explosion-proof 3C certification adopts a certification model that includes type testing plus factory inspection.
In addition to product testing, an annual inspection of the manufacturing facility is required.

Certification Standards for Explosion-Proof Equipment Used in Explosive Gas Environments
GB/T 3836.1-2021 Explosive Atmospheres Part 1: Equipment General Requirements
GB/T 3836.2-2021 Explosive Atmospheres, Part 2: Equipment protected by a flameproof enclosure "d"
GB/T 3836.3-2021 Explosive Atmospheres Part 3: Equipment protected by an "e" type of increased safety
GB/T 3836.4-2021 Explosive Atmospheres Part 4: Equipment protected by intrinsic safety "i"
GB/T 3836.5-2021 Explosive Atmospheres, Part 5: Equipment protected by positive pressure housing "p"
GB/T 3836.6-2017 Part 6: Equipment protected by immersion in liquid "o" for explosive atmospheres
GB/T 3836.7-2017 Explosive Atmospheres, Part 7: Equipment protected by the sand filling type “q”
GB/T 3836.8-2021 Explosive Atmospheres, Part 8: Equipment protected by "n" type protection
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by "m" type encapsulation

Explosive Atmosphere Certification Standard for Combustible Dust Environments
GB/T 3836.1-2021 Explosive Atmospheres Part 1: Equipment General Requirements
GB/T 3836.4-2021 Explosive Atmospheres Part 4: Equipment protected by intrinsic safety "i"
GB/T 3836.5-2021 Explosive Atmospheres, Part 5: Equipment protected by positive pressure housing "p"
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by "m" type enclosures
GB/T 3836.31-2021 Explosive Atmospheres, Part 31: Equipment protected by dust-protection enclosures “t”
explosion-proof certification application consulting service - Shenzhen ZhongNuo Testing Technology Co., Ltd.