With the increasing emphasis on safety production by the country, electrical equipment used in various chemical plants, oil stations, oil depots, grain and oil factories, coal mines and other places must pass the national standardGB3836Obtain the corresponding inspection and testing requirements for the series of explosion-proof standardsExplosion proof certificateOr coal safety certification.

todayZhongnuo TestingIntroduce the relevant knowledge of explosion-proof certification.

1、 Certification body

Enterprise customers can directly contact the certification agency to provide samples and information for certification, or they can also contactShenzhen Zhongnuo Testing Technology Co., LtdProxy handling. At present, there are more than ten institutions in China that are qualified to issue explosion-proof certificates, such as Nanyang CNEX, Shanghai NEPSI, Tianjin PCEC, Shenchuan Institute, Guangzhou Special Inspection Institute, Jiamusi Explosion proof Institute, etc.Zhongnuo TestingMaintain good and stable cooperative relationships with them.

2、 Data requirements:

1. Product drawing data: When applying for the explosion-proof certificate of intrinsic safety electrical equipment, enterprises should provide assembly drawings, circuit schematics, printed circuit board drawings, screen printing drawings, component material lists, and nameplate drawings. When a company applies for an explosion-proof certificate for non intrinsic safety electrical equipment, the technical data submitted for inspection should include the ability toZhongnuo TestingDrawings reflecting 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.

2. Technical documentation: including 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.

3. 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 plasticsShellThe product should provide the material and corresponding performance documents of the plastic. Products with batteries are also availableZhongnuo TestingWe need to provide relevant specifications or testing reports for the battery.

3、 Sample requirements:

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. Observation windowZhongnuo TestingAn additional 5 transparent pieces should be sent, 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. Generally, 1-2 finished products are required.

4、 Application method:

1. Free application: Enterprises can apply to certification agencies on their own, prepare relevant materials, assist in debugging prototypes, and modify non-standard parts of the materials. The process is relatively long, the overall cost is high, and it is time-consuming and labor-intensive.

2. Proxy application: Proxy application refers to a professional explosion-proof electrical technology service organization (such asZhongnuo Testing）The entire process of agency application, including data modification, prototype debugging, and progress coordination, is entrusted to the agency, ensuring good progress. The general processing cycle is 1-2 months, and the comprehensive cost is controllable, saving time and effort.