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 comply with strict industry standards (such as the "Code for Design of Laboratory Gas Supply Systems" GB 50, gas-related standards, and ISO 10462-1), with the core standards being as follows:

Pipe Design Standards

Material Selection:惰性 gases and flammable gases should优先 use 316L stainless steel tubes (inside wall polished, roughness Ra≤0.8μm); corrosive gases should use PTFE tubes; low-pressure gases (such as compressed air) can use copper tubes.

Pipe layout:

Pipes should be installed along the wall or ceiling to avoid crossing over experimental tables and corridors. Use large-radius elbows at turns to reduce air flow resistance.

Hazardous / flammable gas pipelines are prohibited from being buried underground; they must be clearly installed with distinct markings (such as yellow for gas pipelines, red for oxygen pipelines).

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

2. Safety Design Standards

Leak Detection: Gas sensors (such as those with a detection lower limit ≤1% LEL or ≤25ppm) must be installed in toxic or flammable gas areas, interconnected with emergency shutdown 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 volume ≥ 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 regulators must be "one bottle, one use," strictly prohibiting mixed use (e.g., pressure regulators cannot be used for nitrogen).