1、 Introduction to Explosion proof Certificate
Refers to the documents used to determine whether the equipment meets the requirements of standards, type tests, and applicable routine tests. The certificate can be specific to Ex equipment or Ex components. All products that meet the scope of the explosion-proof certificate must obtain an explosion-proof certificate.

2、 Types of explosion-proof certificates
The explosion-proof certificate includes explosion-proof certificates such as explosion-proof type (d), increased safety type (e), intrinsic safety type (i), positive pressure type (p), n type (n), oil filled type (o), sand filled type (q), and sealing type (m).At present, Zhongnuo Testing undertakes the processing of domestic explosion-proof certification, explosion-proof 3C certification, international IECEX certification, and EU ATEX certification.

3、 The process of applying for an explosion-proof certificate

1Zhongnuo Testing first conducts product evaluation and preliminary quotation for products that need to obtain explosion-proof certificates

The enterprise provides product manuals, electrical schematics, and component lists to Zhongnuo Testing for product evaluation, evaluating which type of explosion-proof certificate the product is suitable for, and making a preliminary quotation.

2Provide samples to Zhongnuo Testing laboratory for testing, and the number of samples required varies for different product categories.

3Provide a list of materials for review

Note: To apply for a domestic explosion-proof certificate, you only need to submit the necessary documents to Zhongnuo Testing for review. To apply for international certification, you need to submit the necessary documents to a foreign certification agency for review.

(1) Enterprise qualification certificate

A copy of the business license (at the time of initial inspection), a power of attorney or application letter from the unit.

(2) Enterprise Quality Assurance Certificate (if any)

According to GB3836.1-2000, enterprises should provide corresponding quality assurance certificates when submitting for review. When the enterprise passes the ISO9000 series certification, a copy of the ISO9000 series certification can be provided.

(3) Technical data

The technical materials submitted by enterprises for review include enterprise standards or technical requirements, product drawings, user manuals, etc.

A. Enterprise standards/technical requirements

The enterprise standards/technical requirements of the product should be written in the prescribed format, which should not only include the performance requirements of the product, but also include explosion-proof related content, such as basic parameters, explosion-proof signs, environmental conditions for use, explosion-proof performance requirements, relevant tests of explosion-proof performance, and explosion-proof related signs.

B. Product drawings

When applying for the explosion-proof certificate of intrinsically safe electrical equipment, enterprises should provide general assembly drawings, circuit schematic diagrams, printed circuit board diagrams, silk screen diagrams, component material lists, and nameplate diagrams, etc. When applying for the explosion-proof certificate of non intrinsically safe electrical equipment, the technical data submitted for inspection should include drawings that reflect the explosion-proof performance of the sample (including assembly drawings and part drawings). When the overall drawing can clearly indicate the explosion-proof parameters and structure of the product, only the overall drawing can be sent for inspection.

C. User manual

The user manual should include basic parameters, explosion-proof signs, product outline drawings, installation, maintenance, ordering instructions, and clearly indicate to users the precautions to ensure the explosion-proof performance of the product during installation and use.

D. Other information

For products with adhesive and sealing, the corresponding adhesive and sealing agent model name, performance description, and relevant process documents should be provided. For products with plastic shells, the material and corresponding performance documents of the plastic should be provided.

4Certificate issuance

(1) Domestic: After passing the test and data review, a national explosion-proof certificate can be directly issued

(2) International: After passing the testing, factory inspection, and data review, foreign institutions directly issue certificates

4、 The cycle for applying for explosion-proof certification

The application period for explosion-proof certificates depends on the specific product. With complete information provided by the enterprise, the testing period for applying for intrinsic safety explosion-proof certificates is 2-3 weeks, and the testing period for explosion-proof certificates such as explosion-proof, increased safety, and sealing is 4-6 weeks. You can directly consult Zhongnuo Testing for details.

5、 The cost of applying for an explosion-proof certificate

The cost includes testing fees, certificate fees, etc. For applications for international explosion-proof certificates, factory inspection fees and travel expenses are also required. The specific cost details should be evaluated based on the product and the type of explosion-proof certificate. For details, please consult Zhongnuo Testing.

6、 Advantages of obtaining explosion-proof certificate at Zhongnuo Testing

Shenzhen Zhongnuo Testing, with over ten years of experience in explosion-proof certification services, provides services at a reasonable cost to prepare the required enterprise standards and other related materials for explosion-proof certification. We specialize in the design, research and development, renovation, and sample production of explosion-proof electrical products for factory use, mining use, marine use, and dust use. Our cooperation methods are flexible, and we can undertake overall design contracting or joint design with clients.

Service hotline: 18924609560 (same WeChat account)