Standard for Gas Pipeline Installation in Laboratory Cylinder Rooms

Pipelines for conveying dry gases should be installed horizontally. Pipelines for conveying wet gases should have an incline of not less than 0.3% and slope 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. The oxygen pipeline should be above the other gas pipelines, which are not oxygen pipelines.

When laying pipelines parallel to flammable gas pipelines, 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 laying in layers, the pipeline should be positioned above. Indoor pipelines should not be laid in trenches or directly buried. Avoid running through unsuitable rooms.

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

5. Seamless steel tubes should be used for gases. Pipes for gases with purity of 99% or higher should be made of stainless steel, copper, or seamless steel tubes.

6. The connection parts of pipelines and equipment should be made with metal pipes. For non-metallic flexible hoses, polytetrafluoroethylene pipes and polyvinyl chloride pipes should be used in place of rubber hoses.

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