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 explosion-proof certification and explosion-proof compliance certificate the same?
Many customers ask during inquiries: What's the difference between obtaining a explosion-proof certification and a explosion-proof qualification certificate for a product?
Blast-proof certification and blast-proof compliance certificate are two distinct concepts. Once a product undergoes blast-proof certification, the resulting document is the blast-proof compliance certificate.
Ex-proof certification is the process, and the ex-proof certificate is the result.
So the customer mentioned the product needs to have a explosion-proof certification or an explosion-proof compliance certificate.
The product must pass the explosion-proof standard tests and meet the standard requirements to obtain an explosion-proof certificate.
Explosion-proof certifications can be categorized into intrinsic safety types, flameproof types, positive pressure types, and encapsulation types, among different explosion-proof protection configurations.
ZhongNuo Inspection boasts a team of explosion-proof engineers capable of providing initial design services for explosion-proof circuits and structures.
Assist companies in compiling the necessary drawings, specifications, and documentation, such as corporate standards, for explosion-proof certifications, facilitating their easy acquisition of the explosion-proof compliance certificate.
If you require certification in this area, feel free to message us directly!

Expiry Date of Explosion-Proof Certificate and Renewal Issues
The validity of the domestic explosion-proof certification is 5 years from the date of issuance. If the Certificate expires, you may choose to renew it or replace it. When a company's explosion-proof certification is about to expire, the company should provide an application letter for a replacement within three months before or after the expiration date, and should bring the following documents for the re-application.
International explosion-proof certifications, such as ATEX and IECEx, are valid for a specific period. This is due to their certification process, which combines type testing with a factory production quality system audit, thereby ensuring the validity of the Certificate.

Flammability Dust Environment Explosion Proof Certification Standard:
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 an "p" pressure-proof enclosure
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by cast-in “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 are the technical requirements?
An explosion-proof type is a type of explosion-proof design for electrical equipment.
Its housing can withstand explosive mixtures entering the housing through the housing joint surfaces or structural gaps, and upon internal explosion, it will not be damaged.
And ignition of an explosive gas atmosphere formed by one or more gases or vapors.
Explosion-proof casings must possess both explosion-proof and anti-explosion capabilities. Generally, the casings of explosion-proof products are rather bulky, suitable for products and equipment designed for fixed installations and use.
Explosion-proof face width, gap, and roughness are the three key elements of explosion-proof housing design.
Design requirements for explosion-proof three elements vary depending on the different explosive gas environments used in Class I mining, non-mining Class IIA, IIB, and IIC.
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.
Our team in the explosion-proof field is well-versed in the requirements of explosion-proof standards.
We offer explosion-proof housing design, drafting, modification guidance, certification agency services.
If you have a need for this as well, feel free to message us anytime!
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.