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.
Are product explosion-proof certification and explosion-proof compliance certificate the same?
Many customers ask during inquiries, "What is the difference between having a product undergo explosion-proof certification and obtaining an explosion-proof qualification certificate?"
Flameproof certification and flameproof approval certificate are two different concepts; once a product undergoes flameproof certification, it receives a flameproof approval certificate.
Ex-proof certification is the process, and the ex-proof certificate is the result.
So the client mentioned that the product needs to be certified for explosion-proof or obtain an explosion-proof qualification certificate.
The product must pass the explosion-proof standard tests and meet the standard requirements to obtain an explosion-proof certification.
Explosion-proof certification can be categorized into different protection types, such as intrinsic safety, flameproof, pressurized, and sealed types.
ZhongNuo Inspection boasts a team of explosion-proof engineers who can provide initial design services for explosion-proof circuits and structures.
Assist companies in preparing the required drawings, technical specifications, and documentation such as enterprise standards for explosion-proof certification, facilitating their smooth acquisition of the explosion-proof qualification certificate.
If you need certifications in this area, welcome to send us a private message!

Expiration Date and Renewal of Explosion-Proof Certificate
The validity of domestic explosion-proof certificates is 5 years from the date of issuance. If the Certificate is due to expire, you may choose to renew or replace it. When a company's explosion-proof certificate is about to expire, the company should submit an application letter for renewal within three months before or after the expiry date, and should bring the following documents for the renewal application.
Overseas explosion-proof certificates, such as ATEX and IECEx, are valid for a specific period. This is because their certification process involves a combination of type testing, which includes product certification and a factory production quality system audit, ensuring the validity of the Certificate.

Flammability Dust Environment Explosion Proof Certification Standards:
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 ignition-proof enclosures "t"

What standards are used for explosion-proof certification? What technical requirements are there?
An explosion-proof type is a type of explosion-proofing for electrical equipment.
The housing is capable of withstanding explosive mixtures entering the housing through the housing joint surfaces or structural gaps, without being damaged upon internal explosion.
And cause ignition of an explosive gas atmosphere formed by one, several gases or vapors.
Explosion-proof casings must have both anti-explosion and explosion-proof properties. Generally, the casings of explosion-proof products are quite bulky and are suitable for fixed installations and equipment.
Combustible Gas-Exproof Face Width, Clearance, and Roughness: The three key elements of explosion-proof housing design.
Design requirements for explosion-proof elements vary depending on the different explosive gas environments of Class I mining, non-mining Classes IIA, IIB, and IIC.
Please refer to the design standards of GB/T3836.1 and GB/T3836.2 for specifics.
ZhongNuo Inspection has long been dedicated to explosion-proof product design, testing, and certification services.
We have a team in the explosion-proof field, well-versed in explosion-proof standard requirements.
We offer explosion-proof housing design, illustration, modification guidance, certification agency services.
If you have a need for this as well, feel free to message us anytime!
Explosion-Proof Certification Application Consultancy Services - Shenzhen Zhongnuo Testing Technology Co., Ltd.