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 documents are required to apply for explosion-proof certification?
1. Product Documentation: When an enterprise applies for an explosion-proof certification for intrinsically safe electrical equipment, they should provide assembly drawings, circuit diagrams, printed circuit board diagrams, silk-screened diagrams, material lists of components, and label diagrams, among others. For explosion-proof certification of non-intrinsically safe electrical equipment, the technical documents submitted for inspection should include drawings that reflect the explosion-proof performance of the sample (including assembly drawings and component drawings). If the overall drawing clearly indicates the explosion-proof parameters and structure of the product, only the overall drawing needs to be submitted for inspection.
2. Technical Documents: Include corporate standards/technical requirements. The corporate standards/technical requirements for the product should be written in the specified format, and their content should include not only the performance requirements of the product but also relevant aspects of explosion-proof: such as basic parameters, explosion-proof markings, operating environmental conditions, explosion-proof performance requirements, relevant tests for explosion-proof performance, and markings related to explosion-proof.
3. Additional Information: For products with adhesive bonding or casting, provide the model names, performance descriptions, and relevant process documents for the adhesives and casting agents. For plastic encased products, supply the material and corresponding performance files. Battery-operated products require a specification sheet for the batteries.

explosion-proof certifications can mainly be categorized into the following types:
1. Explosion-proof 3C Certification: This is a mandatory product certification for certain types of explosion-proof electrical equipment. Starting from October 1, 2009, the system has included this category of explosion-proof electrical equipment in the CCC certification catalog. Products listed in the catalog require an explosion-proof 3C certification, following the "product testing + factory audit" model.
2. Explosion-proof Certification: This is a certification for products not listed in the Explosion-proof 3C Catalog. The certification process involves product testing, and upon passing, an explosion-proof certificate is issued. However, it's important to note that while products outside the Explosion-proof 3C Catalog can obtain only the explosion-proof certificate, there is a risk of being penalized by market supervision.
Additionally,防爆产品 can be further categorized based on their application locations into mining and non-mining explosion-proof products:
3. Mining Explosion-Proof Products: Mining explosion-proof products for coal mine sites require Coal Safety Certification, including explosion-proof performance testing and performance standard testing of the products, as well as factory inspections and annual reviews.
4. Non-mining explosion-proof products: classified according to the aforementioned explosion-proof 3C certification and explosion-proof certificate certification.
5. Explosion-proof products for export require different standards of explosion-proof certification based on the destination country, such as ATEX certification and IECEx certification, etc.
Shenzhen ZhongNuo Inspection has been focusing on explosion-proof product testing and certification for many years, well-versed in both domestic and international explosion-proof standards. We have a team of explosion-proof technology engineers who can provide explosion-proof circuit structure design and drawings, as well as targeted explosion-proof solutions to help businesses quickly and conveniently obtain explosion-proof certification. For more details, feel free to send us a private message anytime!

The gas explosion-proof certification and dust explosion-proof certification we commonly refer to are categorized based on the applicable location of the equipment.
Explosion-proof equipment for various hazardous gas environments is certified for gas explosion protection, while equipment for places with combustible dust is certified for dust explosion protection.
In explosion-proof certification, gases are categorized as IIA, IIB, and IIC, while dusts are classified as IIIA, IIIB, and IIIC. Their characteristics and environments vary, and the explosion-proof protection measures for equipment differ accordingly; they should not be interchanged. Of course, certain products, when undergoing explosion-proof certification, consider both gas and dust explosion-proof standards, allowing them to be used in both gas and dust environments. The explosion-proof certificate also indicates whether it is for gas or dust explosion-proof certification through the explosion-proof symbol.
Learn more about explosion-proof information, feel free to contact us anytime!
Shenzhen ZhongNuo Inspection & Technology Co., Ltd. has long focused on the explosion-proof field, boasting extensive experience and a skilled technical team in the current explosion-proof certification domain. We offer experienced intrinsic safety electronic engineers, capable of providing intrinsic safety design, reverse engineering, circuit evaluation, and rectification services to avoid pitfalls for enterprises and assist in their explosion-proof certification process.

What testing projects are involved in explosion-proof certificates, and what are the requirements?
Explosion-proof is one of the most commonly used explosion-proof types for market explosion-proof products, adhering to the standards GB/T 3836.1 and GB/T 3836.2.
Protection against explosion is mainly achieved through the isolation of the explosion-proof housing.
The explosion-proof housing must have sufficient thickness and strength. Even in the event of an explosion inside the equipment, the flame would be extinguished due to the width, gap, and roughness of the housing's joint surfaces, preventing the ignition of the external hazardous environment.
On the other hand, even in the event of an explosion in a hazardous area outside, the explosion-proof housing retains its anti-explosion properties.
Overall, the housing is both blast-proof and explosion-resistant, hence the equipment is rather bulky.
ZhongNuo Inspection has been deeply involved in the explosion-proof field for many years, familiar with the requirements of the GB/T 3836 series standards.
We have extensive experience in the design and modification guidance for explosion-proof products, offering services such as explosion-proof housing design, drafting, certification, and drawing preparation.
If you have a certification need for this, remember to message us!
Explosion-proof Certification Application Consulting Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.