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
The domestic explosion-proof certificate is valid for 5 years from the date of issuance. If the Certificate is due to expire, you may choose to renew it or replace it. When a company's explosion-proof certificate 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.
Overseas 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 an audit of the factory's production quality system, thereby ensuring the validity of the Certificate.

IECEx Certification
IECEx is an explosion-proof electrical product certification system promoted 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. IECEx certification has become a pathway for products used in all hazardous areas to obtain international safety certification, and is now recognized in many countries worldwide (including Australia, New Zealand, Brazil, Canada, China, Japan, South Korea, Malaysia, Singapore, South Africa, the United States, etc.). 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 explosion-proof certificates to those that meet the GB/T3836 standard. Currently, the domestic explosion-proof certification standards are essentially equivalent to the international IEC60079 standard system.

What are the standards 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, and explode internally without damaging the housing.
And causes ignition of an explosive gas atmosphere formed by one or more gases or vapors.
Explosion-proof casings must possess both anti-explosion and explosion-proof capabilities. Generally, the casings for explosion-proof products tend to be bulky, suitable for products and equipment designed for fixed installations and usage.
Combustible gas-tight interface width, gap, and roughness are the three key elements of explosion-proof shell 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.
ZheNuo 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, illustration, modification guidance, certification agency services.
If you have a similar need as well, feel free to send us a private message anytime!
Explosion Proof Certification Application Consulting Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.