Standard for Laboratory Gas Cylinder Room Pipeline Layout

1. Pipelines for conveying dry gases should be installed horizontally. Pipelines for conveying moist gases should have a slope of not less than 0.3% and incline 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, and oxygen pipelines should be positioned above other gas pipelines outside of the oxygen pipelines.

3. When laying pipes parallel to flammable gas pipelines, the distance between them must be no less than 0.50 meters. For cross-laying, the spacing should not be less than 0.25 meters. When laying in layers, the pipes should be placed above. Indoor pipelines should not be laid in trenches or directly buried. Avoid passing through unsuitable rooms.

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

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

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

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