The relationship between flow, velocity, and pipe diameter can be calculated with the following formula, keeping in mind the conversion between different units. Here's an example illustrating how to use the formula: For a 2-inch diameter pipe with a flow velocity of 1 m/s, the flow rate can be determined as follows: The internal diameter (ID) of a 2-inch pipe is 51mm. By applying the pipe cross-sectional area formula (area = ID² ÷ 4 × π), we find the area to be 0.002041785 m². Multiplying the pipe cross-sectional area by the flow velocity gives us a flow rate of 122.5071 L/min (LPM).

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With a plethora of flow meter options available on the market, choosing the right one is crucial for ensuring measurement accuracy and reliability. An inappropriate flow meter selection can result in measurement errors or incorrect calibration, affecting data precision. Hence, understanding the interrelation between flow, velocity, and pipe diameter is essential before selecting a suitable flow meter. This article will delve into this topic, helping you choose the flow meter that best meets your needs.

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When calculating, it's important to convert between different units. Here's a simple example demonstrating how to use the flow rate calculation formula: Suppose there is a pipe with a 2-inch diameter and a flow velocity of 1 m/s. The question is, what is the flow rate?

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For a 2-inch pipe with an internal diameter (ID) of 51mm, the cross-sectional area is calculated using the formula (Area = ID² ÷ 4 × π), resulting in an area of 0.002041785 m². Then, by multiplying the cross-sectional area by the flow velocity, according to the flow rate formula (Flow rate = Cross-sectional area × Flow velocity), the flow rate is determined to be 122.5071 liters per minute (LPM).

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