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.
Why do companies need explosion-proof certification?
Intrinsically safe certification refers to the process of determining if equipment meets explosion-proof standards, requiring type testing and the issuance of relevant certificates. It primarily targets Ex equipment or Ex components.
Explosion-proof products generally refer to explosion-proof electrical equipment: used in environments where explosions of gases or dust may occur.
Electrical products or components with explosion-proof functions that can ignite surrounding explosive environments under specified conditions.
Safety of explosion-proof equipment is closely related to safe production, hence many implement explosion-proof certification systems for explosion-proof electrical products.
Explosion-proof products must obtain explosion-proof certification before they can be used in flammable and explosive hazardous areas.
Blast-proof certification is essential for ensuring the safe use of explosion-proof electrical products.
Blast-proof certification can boost product exports, further enhancing the credibility and trustworthiness of the company and its products, and increasing market competitiveness.
Qualified enterprises can obtain explosion-proof certification domestically.

What should be noted when applying for explosion-proof certification?
1. Is the product design in accordance with the GB/T3836 relevant standards?
2. Can certification documents be provided?
(1) Technical Drawings: Includes circuit diagrams, assembly drawings, structural drawings, PCB layouts, numbering diagrams, BOM sheets, etc.
(2) Product Enterprise Standards and Instructions
(3) Product Name, Model, Applicant Company
(4) Samples: Complete unit samples, batteries, unencapsulated circuit boards, non-metallic material surface samples, etc.
(5) Additional Materials: Casting Sealing Process Documents, Copy of Ex Component Explosion Proof Certificate, Battery Testing Report, Shell Material Testing Report, Wireless Transmission Power Testing Report, etc.
Not all of the above information is required; it depends on the actual structure of the product and the explosion-proof type.
3. Do you have engineers with expertise in explosion-proof technology?
4. Are there specific requirements for the certification body and explosion-proof level?
5. Next is the budget for the costs.
For more details, please DM Shenzhen ZhongNuo Inspection & Technology Co., Ltd. for communication!

Domestic explosion-proof certification modes are categorized into three scenarios -- Shenzhen Zhongnuo Testing Technology Co., Ltd.
1. Explosion-proof certification system
Applicable Products: Electrical and non-electrical equipment used in areas with explosive gases and dust, excluding those for mining purposes (products not listed in the Explosion-proof 3C Catalogue)
Certification Mode: Product Testing
Certification Certificate: Explosion-Proof Qualification Certificate
Certificate Validity: 5 years
Annual Audit Required: No
2. Explosion-proof 3C Certification System
Applicable Products: Electrical Equipment listed in the防爆3C Catalog
Certification Model: Combination of Type Testing and Factory Audit
Certification Certificate: CCC Certificate
Certificate Validity: 5 years
Annual Audit Required: Yes, an annual audit is required.
3. Coal Safety/Mine Safety Certification System
Applicable Products: Various electrical and non-electrical equipment for use in coal mines and non-coal mines underground
Certification Mode: Combination of Type Testing and Factory Audit
Certification Certificate: Mine Product Safety Mark Certificate
Certificate Validity: 5 years
Annual Audit Required: Yes, an annual audit is required

Application Process for Explosion-Proof Certification at Shenzhen Zhongnuo Testing Technology Co., Ltd.
1. Conduct product evaluation and preliminary quoting 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 a preliminary quote.
2. Offer 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 applicant information and product details
(2) Technical documents, including the submitted technical materials by the company, such as corporate standards or technical requirements, product drawings, user manuals, etc.
A. Corporate Standards/Technical Requirements: The corporate standards/technical requirements for the product should be written in accordance with the prescribed format, including not only performance requirements but also relevant content regarding explosion-proof aspects: such as basic parameters, explosion-proof markings, environmental conditions for use, 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 layouts, silk-screening diagrams, 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 assembly drawing clearly indicates the product's explosion-proof parameters and structure, only the assembly drawing needs to be submitted for inspection.
C. Instruction Manual - The instruction manual should include basic parameters, explosion-proof markings, product outline drawings, installation, maintenance, order instructions, 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型号 and name of the adhesive and casting agents, along with their performance descriptions and relevant process documents. For plastic enclosures, supply the material of the plastic and corresponding performance files.
4. Certificate Issuance
explosion-proof certification application consulting service - Shenzhen ZhongNuo Testing Technology Co., Ltd.