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The difference between explosion-proof certification and coal safety certification

Many people always think that the explosion-proof certificate and coal safety certificate are the same, as long as the product obtains the explosion-proof certificate or coal safety certificate, it ca……

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Guidelines for Handling Explosion proof Certificates

Explosion proof certificate refers to a document used to determine whether equipment meets the requirements of standards, type tests, and routine tests for adaptation. The certificate can be for Ex de……

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The meaning of U and X is indicated after the explosion-proof certificate number

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……

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Explosion proof rating and certification significance

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,……

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Testing items and handling institutions for C4 anti-corrosion level certification

Testing items and handling institutions for C4 anti-corrosion level certification

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What is the classification of anti-corrosion grade C5?

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……

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Calibration cycle of combustible gas detection alarm

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……

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Technical requirements for regular testing of gas detection and alarm instruments in the work environment

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 ……

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GB 12358-2024 "General Technical Requirements for Workplace Gas Detection and Alarm Instruments" updated

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……

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Regular testing and calibration of toxic and harmful gas alarm devices

Shenzhen Zhongnuo Detection Technology Co., Ltd. specializes in the detection, calibration, measurement and other services of gas alarms, combustible gas detectors, toxic and harmful gas detectors and……

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