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 a gradient of not less than 0.3% and slope towards the condensate collector.

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

3. When laying pipes 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 laying in layers, the pipes should be placed above. 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 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 metallic pipes. For non-metallic flexible hoses, polytetrafluoroethylene (PTFE) pipes and polyvinyl chloride (PVC) pipes should be used instead of rubber hoses.

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