Shenzhen Zhongnuo Inspection 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.
What does the explosion-proof marking Ex db ib IIC T4 Gb mean?
The explosion-proof marking indicates the type of explosion-proof design adopted by the equipment.
Applicable to explosive areas and explosion-proof zones, etc. What is an explosion-proof sign? What does an explosion-proof sign mean? How to interpret the explosion-proof signs of explosion-proof equipment?
For these issues, ZN Testing will give you a detailed explanation with examples.
For example, explosion-proof marking Ex db ib IIC T4 Gb.
This is a composite explosion-proof marking.
Ex indicates explosion-proof; 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 both explosion-proof and intrinsically safe.
IIC refers to equipment suitable for explosive gas environments of IIC category gases (representative gas being and).
T4 is the temperature category, indicating that the equipment's high surface temperature does not exceed 135°C.
Gb refers to the equipment protection level, applicable to Zones 1 and 2.
Above is an example of a common explosion-proof symbol used for equipment in an explosive gas environment.
If used underground in coal mines or in environments with combustible dust, the explosion-proof marking of the equipment is different.
If it's an ATEX explosion-proof certification mark, it gets more complex.
Business clients seeking more information on explosion-proof certifications and markings, feel free to message us anytime!

Market Access System for Explosion-Proof Products
1. Explosion-proof Certificate System: Applies to all explosion-proof products, adopting the "type testing" method.
2. CCC Certification: Applicable only to certain explosion-proof products (excluding measuring instruments and explosion-proof lighting), conducted through a process of "Type Testing + Factory Inspection"
3. Coal Safety Mark (MA): Suitable for mining products, adopting the "Type Testing + Factory Inspection" method

What test items are required for explosion-proof certification of products? What specific requirements are there for the explosion-proof design of the product? How can the design meet the explosion-proof testing requirements smoothly? This is information many clients producing explosion-proof products want to know. Here, Zhongnuo Inspection & Testing is here to address your questions.
Currently, domestic explosion-proof certification follows the GB/T 3836 series standards. There are general standard requirements for explosion-proof products as well as specific ones. Different product structures, electrical parameters, installation methods, and usage locations are subject to various certification standards and testing items. Consequently, the explosion-proof design and requirements for products also vary. For instance, for intrinsically safe products, typical test items include appearance and structure inspection, spark ignition test, dielectric strength, battery and battery pack testing, temperature rise test, transient energy test, etc. For flameproof products, the main test items include heat and cold resistance tests, internal ignition non-propagation, shell pressure resistance, IP testing, temperature rise test, etc.
If you happen to be in need of explosion-proof certification for your products, Shenzhen Zhongnuo Testing Technology Co., Ltd. is here to assist. We offer preliminary explosion-proof design and rectification consultation, prototype rectification guidance, assistance with drawing and documentation preparation, and certification acquisition agency services. Feel free to send us a private message!

What standards are used for the testing and certification of explosion-proof electrical equipment?
Firstly, it's important to distinguish whether the product requires certification or the on-site facility needs explosion-proof electrical testing.
On-site explosion-proof electrical equipment inspections are conducted in accordance with the provisions of AO3009-2007 standard, requiring at least one routine inspection every 3 years for electrical equipment in use.
And provide a test report. This is mainly for the users of explosion-proof equipment.
Product testing and certification generally refers to the process of conducting relevant tests on new products entering the market in accordance with the GB/T 3836 series standards and obtaining a防爆 qualification certificate.
This requires the provision of product design drawings, manuals, and other documentation, typically for the manufacturer or supplier of the equipment.
ZhongNuo Inspection has been dedicated to explosion-proof testing and certification for many years, offering services including product design, testing, certification, and on-site testing as well as construction and renovation.
Offer customized explosion-proof technology and standard consulting services, with a wealth of collaboration cases. Welcome to message us directly.
Explosion Proof Certification Application Consulting Services - Shenzhen ZhongNuo Inspection Technology Co., Ltd.