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.
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 positive pressure enclosure "p"
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by "m" type encapsulation
GB/T 3836.31-2021 Explosive Atmospheres Part 31: Equipment protected by dust-protection enclosures “t”

Market Access System for Explosion-Proof Products
1. Explosion-proof Certificate System: Applies to all explosion-proof products, utilizing the "type testing" method.
2. CCC Certification: Applicable only to certain explosion-proof products (excluding metrological products and explosion-proof lighting), following the "Type Testing + Factory Inspection" approach
3. Coal Safety Mark (MA): Suitable for mining products, adopted the method of "type testing + factory inspection"

Certificate of Compliance for Explosion-Proof Equipment: Expiration and Renewal Issues
The validity period of the domestic explosion-proof certification is 5 years from the date of issuance.
If the certificate is due to expire, you can choose to renew it or replace it. When the explosion-proof qualification certificate of the company is about to expire,
The company shall provide an application letter for certificate renewal within three months before and after the validity period, and should bring relevant documents for a new application for certificate renewal.
Overseas explosion-proof certificates, such as ATEX and IECEx, are valid for a specific period.
Because their evidence collection method is by means of type testing.
A combination of product certification and factory production quality system audit.
Ensure the validity of the certificate.

Blastproof certification is the process of verifying that equipment meets the requirements of blastproof standards, type testing, and routine tests, and issuing the relevant qualification certificates.
Certificates are available for Ex equipment or Ex components.
The explosion-proof standard GB/T3836 specifies that electrical equipment trial-produced by manufacturers according to the explosion-proof type standards listed in GB/T3836.
All must be tested for explosion-proof requirements by authorized national institutions in accordance with the relevant standards, and obtain an explosion-proof certificate.
This means that explosion-proof products must obtain the relevant explosion-proof certification.
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.