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.
Certificate of explosion-proof validity and renewal issues
Currently, the validity of domestic explosion-proof certificates is 5 years from the date of issuance. If the Certificate is due, you may choose to renew or replace it. When the validity of the company's explosion-proof certificate is about to expire, the company should provide an application letter for certificate replacement within three months before or after the expiration date, and should bring the following documents for the reapplication.
Foreign explosion-proof certificates, such as ATEX and IECEx, are valid for a specified period. This is due to their certification method, which combines type testing with a factory production quality system review, thereby ensuring the validity of the Certificate.

IECEx Certification
IECEx is an explosion-proof electrical products certification system advocated by the International Electrotechnical Commission (IEC), aimed at eliminating differences in equipment and services used in explosive environments, promoting international trade, while maintaining the level of equipment safety requirements. The current explosion-proof standard is IEC 60079. The IECEx certification has become a route for all hazardous area products to obtain international safety certification, and is currently recognized in many countries worldwide (Australia, New Zealand, Brazil, Canada, China, Japan, South Korea, Malaysia, Singapore, South Africa, the United States, etc.). The certificates issued by IECEx are automatically uploaded to the IECEx website, where manufacturers and end-users can find relevant documents.

Domestic explosion-proof certification
Domestic explosion-proof certification is a compliance inspection for explosion-proof products used in explosive environments (including electrical and non-electrical products), issuing an explosion-proof certificate for products that meet the GB/T3836 standard. Currently, the domestic explosion-proof certification standards are essentially equivalent to the international IEC60079 standard system.

What standards are used for explosion-proof certification? What are the technical requirements?
An explosion-proof type is a type of explosion-proofing for electrical equipment.
Its housing can withstand explosive mixtures entering the housing through the housing joint surfaces or structural gaps, without being damaged upon internal explosion.
And ignite an explosive gas atmosphere formed by one, several gases, or vapors.
Explosion-proof casings must possess both explosion-proof and explosion-resistant properties. 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 the explosion-proof three elements vary depending on the different explosive gas environments used in Class I mining, non-mining Classes IIA, IIB, and IIC.
Refer to the design standards of GB/T3836.1 and GB/T3836.2 for specifics.
Zhonuo Testing has long been focused on explosion-proof product design, testing, and certification services.
We have a dedicated team in the explosion-proof field, well-versed in explosion-proof standard requirements.
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.