I. The Perfect Match Between Pipe Diameter and Flow Velocity
Choosing ductwork is like designing a highway for compressed air; too narrow and it will cause congestion (high pressure drop), too wide and it wastes resources (high cost). Experience shows:
Main duct flow velocity should be controlled at 6-10 m/s
Branch ducts can be widened to 10-15 m/s
It is recommended to increase the pipe diameter by one size at bends for buffering.
II. Three Considerations for Material Selection
Different duct materials are like athletes with different strengths:
Galvanized steel pipe: High impact resistance, suitable for heavy-duty factory environments
Aluminum alloy pipe: Significantly lightweight advantage, easy installation
Stainless steel pipe: Outstanding corrosion resistance, the first choice for food-grade applications
III. The Hidden Art of Layout Design
An excellent duct system "breathes":
Main ducts maintain a 1-2° inclination for easy drainage
Branch ducts use T-joints to reduce eddies
Inspection ports are installed every 15 meters for easy maintenance
Avoid high-temperature areas to prevent abnormal condensation