1. The laboratory gas lines are composed of high-quality, fully annealed, seamlessly connected stainless steel tubes. Copper tubes are only used at the ends of pipelines where gas purity requirements are not too strict. (such as a fume hood).    

       2. Pipes shall not be laid on the same rack as cables or conductive lines.

       3. Flammable gases, such as acetylene, need to be introduced separately from other gases. If hydrogen pipelines are laid parallel to other combustible gas pipelines, their spacing should not be less than 0.5M; when they are laid across, the spacing should not be less than 0.25M. When laying in layers, the hydrogen pipeline should be located at the top.

       4. The compressed air has a purification device on the pipeline to filter impurities and moisture. This purification device needs to be connected in parallel and separated by a separate valve to facilitate the maintenance of the filter device.

       5, high purityLaboratory air circuitThe connection is seamlessly welded. Coupling fittings may only be used when connected to a valve or regulating device.

       6. Each laboratory must have separate control valves, pressure reducing valves and pressure gauges.

       7. The pipeline leading to the workbench must be installed with a separate control valve. Control valves that discharge various gases evenly should be installed on the workbench. It is recommended to install a gas purification device in front of the helium pipeline.

       8. Every 1.5 meters or so, the pipeline needs a bracket. In addition, set the appropriate bracket position according to its bending radius. All bends must be supported. Its brackets must be galvanized for anti-corrosion treatment.

       9. Stainless steel pipe fittings can only be unsealed when installed on site. After unsealing, they must be purged with 5N high-purity gas before they can be connected to the system. After the entire system is installed, 5N high-purity nitrogen must be used for large-flow purging to ensure the cleanliness of the entire system.

       10. After the installation of the air supply system is completed, relevant strength tests, sealing tests and stability tests shall be carried out as required.

        The contractor must ensure the cleanliness of the laboratory gas line system and its inspection according to standard procedures. Do a pressure check to avoid pipeline leaks.