Yesterday, Zhongnuo Testing received the "Qualification Certificate for Installation, Maintenance, and Repair of Explosion proof Electrical Equipment" jointly issued by the Explosion proof E……
To conscientiously implement the various requirements of the regulatory authorities on dust control, solve new problems encountered in the development and regulatory process of the industry, formulate……
The symbol "U" in the explosion-proof certificate is used to represent the symbol of Ex components; The symbol "X" in the explosion-proof certificate represents a symbol for specia……
Explosion proof certification is actually a necessary test that most electrical products must pass and obtain certification certificates for. This is not only a guarantee of product quality promotion,……
On July 23rd, Zhongnuo Testing successfully obtained explosion-proof certificates for six different products (five intrinsic safety types and one intrinsic safety and explosion-proof type) for the cus……
According to the Decision of the State Council on Further Reducing the Catalogue of Industrial Product Production License Management and Simplifying the Approval Procedure (Guofa [2018] No. 33), the S……
Warm congratulations to Zhongnuo Testing for winning the bid in LG's "Selected Project for Third Party Testing of Explosion proof Equipment". On June 6, 2019, at the arrival of the Loon……
In 1998, the International Organization for Standardization (ISO) introduced ISO12944 (Corrosion Protection of Steel Structure Protective Coating Systems), which is an international common standard. I……
The calibration cycle for combustible gas detection alarms is usually once a year. According to the national standard JJG 693-2011 "Combustible Gas Detection Alarm", the calibration cycle of……
The main technical requirements include the following: 1. Power on self-test and alarm function: The instrument should have automatic self-test function when turned on, and the alarm component should ……
The new version is GB 12358-2024, which will be officially implemented on June 1, 2025. The standard is applicable to the production and use of combustible gas, toxic and harmful gas, and oxygen detec……
.jpg "The meaning of U and X is indicated after the explosion-proof certificate number")
.jpg "Explosion proof rating and certification significance")
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![GB 12358-2024 "General Technical Requirements for Workplace Gas Detection and Alarm Instruments" updated](/cut_218_168/Data/sts/upload/image/20250207/6.jpg "GB 12358-2024 "General Technical Requirements for Workplace Gas Detection and Alarm Instruments" updated")
