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.
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 measuring instruments and explosion-proof lighting), adopting the method of "Type Testing + Factory Inspection"
3. Coal Safety Mark (MA): Suitable for mining products, adopts the "type inspection + factory inspection" method

Classification of Explosion-proof Certification -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
Blast-proof certification is the process of verifying that equipment meets the requirements of explosion-proof standards, type tests, and applicable routine tests, and issuing relevant qualification certificates. Certificates can be issued for Ex equipment or Ex components.
Different regions have varying certification standards and systems for explosion-proof electrical products. Currently, international explosion-proof certifications include domestic explosion-proof certification, ATEX certification, IECEx certification, and North American explosion-proof certification, among others.

What are the requirements for enterprises to apply for explosion-proof certification? -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
For enterprises, applying for a domestic explosion-proof certificate imposes no special requirements on the company (except for the explosion-proof 3C certification).
Primarily, it's to check if the product meets the explosion-proof standards and whether you can provide the necessary certification documents.
If the product falls under the explosion-proof 3C certification category, the applicant must have a manufacturing facility (OEM/ODM is also acceptable).
Because the explosion-proof 3C certification is a certification model that involves both type testing and factory audit.
In addition to product testing, an annual inspection of the manufacturing facility is required.

What does the explosion-proof marking Ex db ib IIC T4 Gb mean?
The explosion-proof marking indicates the type of explosion-proof design for the equipment.
Applicable to explosive areas and explosion-proof zones, etc.
What is an explosion-proof marking? What does an explosion-proof marking signify? How to interpret the explosion-proof marking on explosion-proof equipment?
For these issues, ZN Testing provides a detailed explanation for your reference.
For example, explosion-proof marking Ex db ib IIC T4 Gb.
This is a composite explosion-proof marking.
Ex indicates explosion-proof, all explosion-proof equipment must be marked with the Ex symbol.
db ib refers to the explosion-proof protection type of the equipment, meaning it is a combination of explosion-proof and intrinsically safe.
IIC refers to equipment suitable for IIC category explosive gas environments (representative gas is and).
T4 is the temperature category, indicating that the equipment's surface temperature does not exceed 135°C.
Gb refers to the equipment protection level, applicable to Zones 1 and 2.
The example above illustrates a common explosion-proof marking used for equipment in an explosive gas environment.
If the equipment is used underground in coal mines or in environments with combustible dust, the explosion-proof markings are different.
If it's an ATEX explosion-proof certification mark, it gets a bit more complex.
Corporate clients, if you need more information on explosion-proof certification and explosion-proof marking, feel free to message us anytime!
Explosion Proof Certification Application Consulting Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.