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 experimental equipment in laboratories. Its design and construction directly affect 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 "Design Code for 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: 316L stainless steel tubes (with polished inner walls, roughness Ra≤0.8μm) are preferred for inert and flammable gases; tubes made of (PTFE) are used for corrosive gases; copper tubes can be used for low-pressure gases (such as compressed air).

Pipe layout:

Pipe should be laid along the wall or ceiling, avoiding crossing over experimental tables and corridors. At turning points, use large-radius elbows (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 and red 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 (such as those with a detection lower limit of ≤1% LEL or ≤25ppm) must be installed in toxic or flammable gas areas. These sensors should be interconnected with emergency shutdown valves to cut off the gas supply 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 should be installed on the ground.

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

Steel Cylinder Management:

Cylinders must be securely mounted on a dedicated stand or wall bracket (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 usage," strictly prohibited from being mixed (e.g., pressure regulators are not suitable for nitrogen).