The required documents for applying for an explosion-proof certificate are:

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) User 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.

3. Sample submission for explosion-proof certificate application

The prototype submitted by the enterprise for inspection should be consistent with the approved drawings and fully assembled, and the number of inspection units should meet the requirements. If there are special disassembly tools, they should be sent together. For sealed electrical equipment, one set of products with intact sealing and one set of products without sealing should be sent. An additional 5 pieces of transparent components for the observation window should be provided, at least 3 pieces. An additional 8 pieces, at least 5 pieces, of transparent components for the lighting fixtures should be provided. The rubber aging test should provide 3-5 35 × 15 × 6 rubber blocks. Two plastic sheets with a diameter of 150 × 60 are required for measuring the insulation resistance of plastic shells. If the size allows, the plastic casing can be directly measured.

For more information on explosion-proof certification, please contact Zhongnuo Testing directly

Service Hotline: 18924609560 (same WeChat account)