Air velocity through piping is the speed at which air flows within a specific section of piping and measure of how quickly the air molecules move through the pipe. Air velocity is an important parameter in various applications, particularly in ventilation, HVAC systems, pneumatic conveying, and industrial processes. The air velocity through piping depends on factors like the diameter of the pipe, the pressure difference across the pipe, the length of the pipe, and any obstructions or restrictions present in the system. It is closely related to the air flow rate, which is the volume or mass of air passing through the pipe per unit of time.
Air Velocity Through Piping Formula |
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\( v_a \;=\; \dfrac{ Q_a }{ 60 \cdot \pi \cdot \left( \dfrac{ d }{ 24 } \right)^2 } \) (Air Velocity through Piping) \( Q_a \;=\; 60 \cdot \pi \cdot v_a \cdot \left( \dfrac{ d }{ 24 } \right)^2 \) \( d \;=\; 24 \cdot \sqrt{ \dfrac{ Qa }{ 60 \cdot \pi \cdot v_a } } \) |
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| Symbol | English | Metric |
| \( v_a \) = Air Velocity | \(ft \;/\; sec\) | \(m \;/\; s\) |
| \( Q_a \) = Air Flow Rate | \(ft^3 \;/\; sec\) | \(m^3 \;/\; s\) |
| \( \pi \) = Pi | \(3.141 592 653 ...\) | \(3.141 592 653 ...\) |
| \( d \) = Pipe Inside Diameter | \( in \) | \( mm \) |
