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.
What are the requirements for a company to apply for explosion-proof certification -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
For businesses, there are no special requirements for applying for domestic explosion-proof certificates (except for the explosion-proof 3C certification).
Primarily, it's to check if the product meets the explosion-proof standards and if the necessary certification documents can be provided.
If the product falls under the explosion-proof 3C certification category, the applicant must have a production factory (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 audit of the manufacturing facility is required.

Classification of Explosion-proof Certification -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
Blastproof certification is the process of verifying that equipment meets the requirements of explosion-proof standards, type testing, 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, explosion-proof certifications internationally can be categorized into domestic explosion-proof certification, ATEX certification, IECEx certification, and North American explosion-proof certification, among others.

How to apply for an explosion-proof certificate for a modular equipment?
There is an increasing number of modular equipment used in explosion-proof environments, offering more complex functionalities. In response to the technical requirements for explosion-proof certification of such equipment, ZhongNuo Inspection has summarized years of industry experience, primarily highlighting the following points:
(1) Explosion-proof performance is only considered for the electrical components, including their installation and connection, grounding, etc., without considering the steel structure part.
(2) Electrical components must be purchased and installed with a防爆certification or a防爆3C certificate. If suitable explosion-proof electrical components cannot be obtained, consider using explosion-proof/positive pressure methods for installation.
(3) The explosion-proof marking of the selected explosion-proof electrical components must not be lower than the explosion-proof marking grade of the entire machine.
(4) Explosion-proof electrical components must be installed in compliance with standard requirements for electrical connections and grounding.
In the field of obtaining certifications for modular equipment, CN检测 boasts a technical team and industry experience, capable of providing explosion-proof design guidance such as positive pressure and explosion-proof.
Guide customers in the selection, installation, and preparation of electrical equipment drawings and documents.
Engineers can be dispatched for on-site inspections to reduce customers' cost and time for evidence collection.
Successful certification cases include robots, AGV carts, industrial ovens, high and low-temperature chambers, filling machines, injection machines, portable fueling stations, chemical storage cabinets, dust removal equipment, etc.
Feel free to DM us for further discussion if you have a need for this.

What is positive pressure explosion-proof? What technical requirements are there for a product to undergo a positive pressure explosion-proof certification?
Positive pressure explosion-proof refers to introducing clean air or inert gas into the interior of the equipment.
Ensures internal equipment pressure is higher than the external explosive environment pressure, preventing explosive mixtures from entering the equipment to achieve explosion-proof performance.
The applicable standards for explosion-proof certification with positive pressure are GB/T 3836.1 and GB/T 3836.5.
Primarily assess the equipment's ventilation time, pressure monitoring system, pressure range, blow-off, and alarm features to meet explosion-proof performance requirements.
Positive pressure types include防爆 grades of pxb, pyb, and pzc.
Choose the appropriate explosion-proof certification level based on product structure and explosion-proof areas.
ZheNuo Inspection has been involved in the explosion-proof industry for many years, well-versed in the requirements of the GB/T 3836 series standards.
Extensive experience in obtaining certifications for explosion-proof pressure systems.
Offer one-stop explosion-proof technical guidance and consulting services, including initial pressure explosion-proof design and rectification, drawing assessment, installation guidance, and certification.
Our successful cases include positive pressure ultrasonic shock plates, positive pressure omni-directional antennas, and positive pressure film thickness gauges.
If you have a need for this, feel free to message us anytime!
Explosion-proof Certification Application Consultancy Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.