Standard for Laboratory Cylinder Room Gas Pipeline Installation

1. Pipes for conveying dry gases should be installed horizontally. Pipes for conveying wet 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 framework, with a minimum spacing of 0.25 meters, with the oxygen pipeline placed above the other gas pipelines outside of the oxygen pipeline.

3. When laying pipes parallel to flammable gas pipelines, the distance between them must not be less than 0.50m. When crossing, the spacing should not be less than 0.25m. In layered laying, the pipes should be placed 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 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 part of pipelines and equipment should use metal pipes. For non-metallic flexible hoses, polytetrafluoroethylene pipes and polyvinyl chloride 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.