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What are the specific requirements for laboratory gas installation?

(Summary description)

What are the specific requirements for laboratory gas installation?

(Summary description)

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What are the specific requirements for laboratory gas installation?

 

1. All gas pipelines are composed of high-quality, fully annealed, seamlessly connected stainless steel pipes (grade BA). Copper pipes are only used at the end of the gas pipeline, where the gas purity requirements are not too strict. (Such as a fume hood). 1626415731264169.jpg  

2. Gas pipelines must not be laid on the same frame as cables and conductive lines.

3. Flammable gas, such as acetylene, needs to be introduced separately from other gases. If hydrogen pipelines are laid in parallel with other combustible gas pipelines, the spacing should not be less than 0.5M; the cross laying time should not be less than 0.25M. When laying in layers, the hydrogen pipeline should be located above.

4. Compressed air has a purification device for filtering impurities and moisture in the pipeline. This purification device needs to be connected in parallel and isolated by a separate valve to facilitate the maintenance of the filter device.

5. The connection of the high-purity gas pipeline is seamless welding. Fittings can only be used when connecting to a valve or regulating device.

6. Each laboratory must have a separate control valve, pressure reducing valve and pressure gauge.

7. The gas pipeline leading to the workbench should be equipped with a separate control valve. A control valve that uniformly discharges various gases 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 gas pipeline needs to have brackets. In addition, according to the bending radius of the gas pipeline, set a suitable bracket position. All bends must be supported. All brackets of the gas pipeline must be galvanized anti-corrosion treatment.

9. The stainless steel pipe fittings can be unsealed when they are installed on site. After unsealing, 5N high-purity gas must be applied to the system before they can be connected to the system. After the installation of the entire system is completed, 5N high-purity nitrogen is used for high-flow purge to ensure the cleanliness of the entire system.

10. After the installation of the gas supply system is completed, carry out relevant strength tests, sealing tests and stability tests as required.

 

The laboratory contractor must ensure the cleanliness of the gas piping system, and all gas piping inspections are in accordance with standard procedures. The gas pipeline should be pressure checked to prevent pipeline leakage.