T/SLEA 0031.4-2022 Active

Main technical content: This document specifies the terms and definitions, classification, materials, requirements, test methods, inspection rules and markings, packaging, transportation, storage, installation guidelines, use and maintenance, and troubleshooting for laboratory gas valves. This document applies to laboratory gas valves and end gas nozzles with a metric outer diameter not exceeding 32mm (DN25), where the gas nozzle is the outlet on the valve. This document does not apply to low-temperature fluids such as liquid nitrogen and liquid helium in laboratories. For gases such as acetylene and ethylene, it is recommended to use stainless steel valves. (Note: The CCS number in the standard is defined according to the "Chinese Standard Document Classification Number" used in the regulatory authority system. The classification number used in the platform database is the 2017 edition of the National Economic Industry Classification Number. The classification numbers in the two systems are inconsistent. When uploading the standard text to the platform, the classification number is selected according to the platform's classification number. Therefore, after downloading the standard text, you will see that the CCS number is inconsistent with the classification number selected in this system.)