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1、 Introduction to Explosion proof Certificate
The document used to determine whether the equipment meets the requirements of standards, type tests, and routine tests for adaptation. The certificate can be for Ex devices or Ex components. All products within the scope of the explosion-proof certificate must obtain an explosion-proof certificate.

2、 Types of explosion-proof certificates
Explosion proof certificates include 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).

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

1Zhongnuo Testing first conducts product evaluation and preliminary quotation for products that require explosion-proof certification

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

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

3Provide a list of materials for review

Note: To apply for a domestic explosion-proof certificate, only the required documents need to be submitted to Zhongnuo Testing for review. To apply for international certification, the required documents need to be submitted to a foreign issuing agency for review.

(1) Enterprise Qualification Certificate

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

（2）technical information

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 include not only the performance requirements of the product, but also relevant content related to explosion protection, such as basic parameters, explosion protection signs, environmental conditions for use, explosion protection performance requirements, relevant tests of explosion protection performance, and signs related to explosion protection.

B、 Product drawings

When applying for an explosion-proof certificate for intrinsically safe electrical equipment, enterprises should provide assembly drawings, circuit schematics, printed circuit board diagrams, screen printing diagrams, component material lists, and nameplate diagrams. When a company applies for an explosion-proof certificate for non intrinsic safety electrical equipment, the technical data submitted for inspection should include drawings that can 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 submitted for inspection.

C、 an instruction manual

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

D、 Other information

For products with adhesives and sealants, the corresponding adhesive and sealant model names, performance specifications, 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 level explosion-proof certificate can be directly issued

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

4、 Cycle for applying for explosion-proof certificate

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

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

The cost includes testing fees, certificate fees, etc. Those applying for an international explosion-proof certificate also need to include factory inspection fees and travel expenses. The specific cost details need to be evaluated based on the product and the type of explosion-proof certificate. For more information, please consult Zhongnuo Testing.

6、 The advantages of obtaining an 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 enterprise standards and other related materials required for explosion-proof certification. We specialize in the design, research and development, modification, and sample production of explosion-proof electrical products such as factory explosion-proof, mining explosion-proof, marine explosion-proof, and dust explosion-proof. Our cooperation is flexible and can be contracted as a whole or jointly designed with customers.

Service Hotline: 18924609560 (same WeChat account)