Standard for gas pipeline installation in laboratory gas cylinder room

1. Pipelines for conveying dry gases should be installed horizontally. Pipelines for conveying moist gases should have a gradient of not less than 0.3% and slope towards the condensate collector.

2. Oxygen pipelines and other gas pipelines can be mounted on the same frame, with a spacing of not less than 0.25 meters. The oxygen pipeline should be above the other gas pipelines, excluding the oxygen pipeline.

3. When pipes are laid parallel to flammable gas pipes, the distance between them must not be less than 0.50 meters. When crossing, the spacing should not be less than 0.25 meters. When laid in layers, the pipes should be on top. Indoor pipes should not be laid in trenches or directly buried. Avoid passing through unsuitable rooms.

4. Gas pipelines should not be installed on the same frame as cables and wiring laid on-site.

5. Gases should be conveyed through seamless steel pipes. Pipes for gases with purity of 99% or higher should be made of stainless steel, copper, or seamless steel pipes.

6. The connection sections of pipes and equipment should be made with metallic pipes. For non-metallic flexible hoses, polytetrafluoroethylene (PTFE) tubes and polyvinyl chloride (PVC) tubes should replace rubber hoses.

7. Valve and accessories materials: Copper materials shall not be used for gas pipelines. Other gas pipelines may be made of copper, carbon steel, malleable cast iron, and other materials.