Standard for gas pipeline installation in laboratory gas cylinder room

1. Piping for conveying dry gases should be installed horizontally. Piping 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 installed on the same frame, with a spacing of not less than 0.25 meters. Oxygen pipelines should be located above other gas pipelines, excluding oxygen pipelines.

3. When pipes are laid parallel to flammable gas pipelines, the distance between them must be no 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 positioned above. Indoor pipes should not be laid in ditches or directly buried. Avoid passing through unsuitable rooms.

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

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

Valves 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.