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 enterprises, there are no special requirements for obtaining a domestic explosion-proof certificate (except for the explosion-proof 3C certification).
Primarily, it's about checking if the product meets the explosion-proof standards and if you can provide the relevant certification documents.
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 inspection of the manufacturing facility is also required.

Why choose tempered glass for explosion-proof transparent parts?
Transparent components are a crucial material for explosion-proof electrical equipment. When selecting transparent components, customers always inquire about the material to be used? Can glass be used? Can plastic be used?
Below, Shenzhen Zhongnuo Testing Technology Co., Ltd. explains it for everyone.
The GB/T3836.1 specifies the thermal shock test for transparent parts, aiming to verify the thermal stability of glass under rapid cooling conditions. Currently, tempered glass is a material that not only meets these requirements but also offers a high cost-performance ratio.
普及 the fact that tempered glass, after being heated and quenched, forms an even layer on the surface.
The compressed stress layer counteracts the tensile stress generated on the surface during rapid cooling. Therefore, even when subjected to stress from rapid cooling, qualified tempered glass has a compressed stress layer to offset its effects.

ATEX Certification
ATEX is the European directive for "Equipment and protective systems intended for use in potentially explosive atmospheres."
The aim is to create a single market within Europe, eliminate trade technical barriers, and ensure the free circulation of equipment intended for potential explosive hazardous environments among its member states.
This directive encompasses mining and non-mining equipment (including mechanical and electrical equipment).
Expand the potential explosive hazard environment to include airborne dust and combustible gases, as well as flammable vapors and mist.
Established basic health and safety requirements for the use of equipment intended for potential explosive environments.
And the conformity assessment procedures that must be adopted before the equipment enters the European market.
The current directive is 2014/34/EU.

Application Process for an Explosion-Proof Certification at Shenzhen Zhongnuo Inspection Technology Co., Ltd.
1. Conduct product evaluation and initial quotation for the applied product. Evaluate the product using the company's product specification, electrical schematic, and component list, determine the suitable type of explosion-proof certification for the product, and provide an initial quotation.
2. Provide samples for testing at the lab; the quantity of samples required varies depending on the product category.
3. Provide documentation list review
Application documents, including the applicant's information and product information
(2) Technical Documents - The submitted technical documents by the company include corporate standards or technical requirements, product drawings, user manuals, etc.
A. Corporate Standards/Technical Requirements: The corporate standards/technical requirements for products should be written in the prescribed format, including not only performance requirements but also relevant content regarding explosion-proof aspects: 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.
B. Product Drawings - When applying for a防爆 certification for intrinsically safe electrical equipment, the applicant should provide assembly drawings, circuit diagrams, printed circuit board drawings, silk screen drawings, material lists for components, and label drawings, among others. For non-intrinsically safe electrical equipment, the technical documents submitted for inspection should include drawings that reflect the sample's explosion-proof performance (including assembly drawings and component drawings). If the overall drawing can clearly indicate the product's explosion-proof parameters and structure, only the overall drawing needs to be submitted for inspection.
C. User Manual - The user manual should include basic parameters, explosion-proof markings, product外形 diagram, installation, maintenance instructions, ordering information, and clear warnings to the user regarding the importance of ensuring the product's explosion-proof performance during installation and use.
D. Additional Information: For products with adhesive bonding or casting, provide the model names, performance descriptions, and relevant process documents for the adhesive and casting agents. For products with plastic casings, provide the material of the plastic and corresponding performance documents.
4. Certificate Issuance
Explosion-proof Certification Application Consulting Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.