How to calculate the flow rate of a water pipe, and how to calculate the flow rate of a water pipe?

Pipe diameter, flow rate, flow comparison table.

Pipe diameter (dn) flow rate m3 h

Pipe diameter (dn) Recommended value for flow rate m s:

Closed system. Open system.

50mm tap water pipe, water pressure 6kg, what is the flow rate in 1 hour?

Summary. The flow rate of the pipe is the product of the cross-sectional area of the pipe and the water flow velocity. 1. Calculation formula:

Flow rate pipe cross-sectional area Flow velocity pipe cross-sectional area Pipe inner diameter 2) 2) In the formula: the flow rate unit is m h The flow rate unit is m s The inner diameter unit of the pipe is mm2, example: example:

For 110mm pipes, when the water flow rate is l meter second, the flow rate of water in the pipe is calculated.

Solution: First, the unit of cross-sectional area of the pipe is converted:

Pipe cross-sectional area

Then the flow rate units are converted:

Flow velocity = 1 m s = 3600 m h

Finally, it is calculated by the flow calculation formula:

Flow rate = pipe cross-sectional area Flow velocity =

How to calculate the flow rate of a water pipe?

The flow rate of the pipe is the product of the cross-sectional area of the pipe and the water flow velocity. 1. Calculation formula: flow rate pipe cross-sectional area flow rate pipe cross-sectional area pipe inner diameter 2) 2) 2 formula:

The flow rate unit is m h, the flow rate unit is m s, and the inner diameter unit of the pipe is mm2, for example: for example, when the water flow rate of a 110mm pipe is l m second, calculate the flow rate of water in the pipe.

Solution: First convert the unit of pipe cross-sectional area: pipe cross-sectional area and then convert the unit of flow velocity:

Flow velocity = 1m s = 3600m h and finally calculated by the flow calculation formula: flow rate = pipe cross-sectional area flow velocity =

Hope it helps you ha<>

Pipe flow is the product of the cross-sectional area of the pipe and the velocity of the water.

1. Calculation formula:

Flow rate = pipe cross-sectional area Flow velocity =

Pipe cross-sectional area Pipe inner diameter 2)2

where: the flow rate is in m h

The flow velocity is measured in m s

The inner diameter of the pipe is in mm

2. For example: For example, when the water flow rate of 110mm pipe is l meter second, calculate the flow rate of water in the pipeline.

Solution: First, the unit of cross-sectional area of the pipe is converted:

Pipe cross-sectional area

Then the flow rate units are converted:

Flow velocity = 1 m s = 3600 m h

Finally, it is calculated by the flow calculation formula:

Flow rate = pipe cross-sectional area Flow velocity =

It can be calculated using the calculation formula:

Hourly Flow Formula:

Flow rate = 3600 tube area Flow rate.

Pipe Area = Radius)2 or Pipe Area = Radius)2

where the flow rate unit is m3; Flow velocity is measured in meters and seconds; The radius or diameter is measured in meters; 3600 is the number of seconds converted into 1 hour. Because the result of the area (m2) flow rate (m2) is m3 seconds, which refers to the flow rate in 1 second, therefore, when converted into a flow rate of 1 hour m3, it must be multiplied by the number 3600.

Example 1 What is the flow rate of a DG100 tube with a flow rate of 1 m/s?

Solution Flow = 3600 Tube Area Flow Velocity. First, convert the diameter to meters, and the area of the pipe = m2.

Then flow rate = 3600 m3 Note that the above equation applies not only to water, but also to other liquids or gases. If there is water flowing in the pipe, the calculation is how many meters of water is 3 hours, and if it is steam, how many meters of steam is calculated.

The flow rate can also be expressed in terms of weight. Because 1 meter 3 of water is exactly 1 ton, we say that the flow rate of 1 meter 3 of the water pipe is the flow rate of 1 ton. Example 1, if you say water pipes, tons of hours.

But if we talk about the steam Bihui pipe, we can't say that 1 meter 3 hour is 1 ton hour, because 1 cubic meter of steam weighs only a few kilograms, and the weight of the steam varies with its pressure, for example, the steam with a pressure of 10 kilograms of centimeter 2 weighs only kilograms per cubic meter, and the steam flow rate at 1 meter 3 is only equivalent to kilograms. Therefore, if the meter is 3 hours, it is the steam flow, it should be said to be kilogram hours.

Flow formula for water pipes: Q = A (2gh).

Flow velocity formula for water pipe: v=4q (d2).

When the pipeline is filled with water, the pipeline flow coefficient.

1/√(1+ζ+l/d)=1/√(1+

Pipe overflow area a= d 2 4= * m 2

Flow rate Q = A (2GHz) = m 3 s

Flow velocity formula v=4q ( d 2)=4*

Calculating the flow rate of a water pipe requires knowing parameters such as the diameter, length, pressure, temperature of the water, and density of the water. If the conditions are met, the flow rate of a water pipe can be calculated using the following formula:

q = π d²/4 * v

wherein, q represents the flow rate, and the unit is cubic meter hours; is pi, approximately equal to; d is the diameter of the pipe, and the unit is meters; v is the water velocity in meters and seconds. This formula assumes that the water flow is uniform in a horizontal pipe and that the drain is free of blockages, leaks, damage, and throttling.

In order to calculate the flow velocity v of water in a water pipe, the following typical operation can be used:

1.Measuring the Pressure Difference: The pressure difference is measured upstream and downstream of the pipeline, and this measured pressure can be used to calculate the flow rate of water.

2.Calculate the flow rate of water: Calculate the flow rate v of water using the flow calculation formula (q=va). Specifically, the proposed pressure difference is substituted into the following formula:

v = [2gδh/(ρ*d)]^

where g is the acceleration due to gravity, about meters and seconds, is the density of the water, d is the diameter of the pipe, and δh is the height difference between the upstream and downstream points of the water surface.

3.Calculate the flow rate of water: Calculate the flow rate of the water pipe using the formula q = d 4 * v.

It should be noted that calculating the flow rate of a water pipe requires careful measurement and determination of individual parameters, and selection of appropriate formulas for calculation. If accurate parameter values cannot be obtained or other uncertain factors exist, there may be some errors in the flow calculation results.

In general engineering calculations, the pressure of water pipelines is commonly used as follows: the flow rate of water in the water pipe is 1-3 meters per second, and it is often taken in meters and seconds.

Flow rate = pipe cross-sectional area x flow velocity = pipe diameter 2x flow rate (cubic meters per hour) 2: squared. Pipe diameter unit: mm

Pipe diameter = sqrt (flow rate).

sqrt: open squared.

The formula for saturated steam is the same as for water, except that the flow rate is generally 20-40 m/s.

If you need to calculate accurately, you should first assume the flow rate, then calculate the Reynolds standard according to the viscosity, density and diameter of the water, and then calculate the resistance coefficient along the route by the Reynolds standard, and check the pipe fittings in the pipeline (such as tee, elbow, valve, reducer, etc.) to find out the equivalent pipe length, and finally calculate the pressure loss of the main pipeline by the resistance coefficient along the way and the total length of the pipeline (including the equivalent pipe length), and calculate the actual flow rate according to Bernoulli, and then use the actual flow rate to calculate the above process. until the two are close (stacked test algorithm). Therefore, in practice, few friends calculate it like this, basically according to the size of the pressure difference to choose different flow rates, according to the first method to calculate.

The maximum flow rate of a water pipe depends on factors such as the diameter, length, material, water pressure, and speed of water flow. In general, the maximum flow rate of a water pipe can be calculated using the following formula:

q = a × v

where Q represents the maximum flow rate of the water pipe, A represents the cross-sectional area of the pipe, and V represents the flow rate of the water. The cross-sectional area can be calculated from the diameter of the pipe, and the flow rate can be calculated from the water pressure and flow rate of the pipe.

The cross-sectional area of the pipe is calculated from the diameter of the water pipe, and the formula is: a = d 2) 2, where d represents the diameter of the water pipe.

The flow rate of water is calculated from the water pressure and flow rate of the water pipe, and the formula is: v = q a, where q represents the flow rate of water.

Substituting the calculation results of step 1 and step 2 into the formula q = a v, the maximum flow rate of the water pipe can be obtained.