This also depends on whether it is for on-site equipment testing or product testing,

The explosion-proof testing standards for the product are GB/T3836 and other series. Different explosion-proof types are subject to different professional standards. For example, GB/T3836.2 is a standard for explosion-proof,GB/T3836.4 is a standard for intrinsic safety, etc. If it is a composite explosion-proof sign, it must meet the requirements of different specialized standards at the same time.

If it is the testing of equipment used in hazardous areas, it is in accordance with AQ3009-2007 "Electrical Safety and Explosion Prevention Code for Hazardous Areas", and the testing cycle shall not exceed 3 years.The implementation standards are AQ3009/GB50058/GB15577, etc.

Zhongnuo Testing provides testing and certification for explosion-proof products, on-site explosion-proof testing in explosion-proof areas, explosion-proof construction and renovation services, with complete qualifications and professional services. If you need it, please feel free to contact us for a quotation!