The Laboratory Gas Supply System is a specialized pipeline system designed to provide stable, clean, and safe gases (such as carrier gas, fuel gas, assist gas, inert gas, etc.) for various analytical instruments and laboratory equipment. Its design and construction directly impact experimental accuracy, equipment lifespan, and personnel safety, and is widely used in fields such as chemical analysis, biopharmaceuticals, materials science, and environmental testing.

Key Design and Construction Standards

The laboratory gas supply system must adhere to strict industry standards (such as the "Code for Design of Laboratory Gas Supply Systems" GB 50, related gas supply standards, ISO 10462-1), with the core standards being as follows:

Pipe Design Standards

Material Selection: Use 316L stainless steel tubes (with polished inner walls and surface roughness Ra≤0.8μm) for inert and flammable gases; use (PTFE) tubes for corrosive gases; and copper tubes for low-pressure gases (such as compressed air).

Pipe Layout:

Pipes must be installed along walls or ceilings, avoiding crossing over experimental tables or corridors. Use large-radius elbows at turns to reduce air flow resistance.

Hazardous/flammable gas pipelines are prohibited from being buried underground and must be installed visibly with clear identification (e.g., yellow marking for gas pipelines, red marking for oxygen pipelines).

Pressure and Flow Control: Each gas terminal must be equipped with a secondary pressure reducing valve, and the flow meter accuracy must be ≥ 1.5 class.

2. Safety Design Standards

Leak Detection: Gas sensors must be installed in toxic and flammable gas areas (e.g., sensors with a detection lower limit of ≤1% LEL, or ≤25ppm), linked to emergency shut-off valves to cut off the gas source within 10 seconds upon detection of a leak.

Explosion-proof and ventilation:

Flammable gas storage areas (cylinder rooms) require explosion-proof lighting and switches, and anti-static rubber flooring.

Each gas terminal must be equipped with a swivel exhaust hood (exhaust capacity ≥120 m³/h), and experiments with toxic gases must be conducted inside a fume hood.

Steel Cylinder Management:

Cylinders must be securely mounted on a dedicated bracket or wall rack (to prevent tipping), with a minimum distance of ≥1.5m between different types of cylinders (e.g., oxygen cylinders must not be stored in the same room).

Steel cylinder pressure reducing valves must be "specific bottle, specific usage," strictly prohibited from being mixed (such as pressure reducing valves not to be used for nitrogen).