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How to calculate the flow when the pipe pressure and diameter are known It is known that the inner diameter of the pipeline is d = 150 and the outlet pressure of the pipeline is 0.3MPa. How to calculate the flow of the pipeline,
The flow rate is not only related to the pipe diameter and the pressure in the pipe, but also related to the length of the pipe and the resistance of the pipe
Know the pipe diameter, pressure, length, how to calculate the amount of natural gas in the pipeline?
I want to know, specifically, how many cubic meters of natural gas can there be in a steel pipe with a length of 2000 meters, a pressure of 4 kg and a diameter of 150 mm without flowing?
3.1415926 * 0.075 square * 2000 * (4 + 1) = 176.71458375 circumference radius square pipeline length standard condition pressure natural gas cubic number approximate value because of the circumference. Explain several terms of calculation, I believe you can see the front, the circumference times radius square times length, don't need to explain
Calculation formula of water supply pipe diameter
Galvanized pipe is calculated by inner diameter, inner diameter 15mm = 4 branches, 20mm = 6 points, 25mm = 1 inch; PPR pipe / aluminum plastic pipe is calculated by inner diameter, 16mm is equivalent to 3 branches, 20mm is equivalent to 4 points of galvanized pipe diameter
Copy it. Sorry
In general engineering calculation, the pressure of water pipe is usually 0.1-0.6mpa, and the flow velocity of water in water pipe is 1-3m / s, usually 1.5m/s
Flow = pipe cross section x flow rate = 0.002827x pipe diameter ^ 2x flow rate (m3 / h) ^ 2: square. Pipe diameter unit: mm
Pipe diameter = √ (353.68x flow / flow rate)
The formula of saturated steam is the same as that of water, but the flow rate is generally 20-40 M / s
If accurate calculation is needed, it is necessary to first assume the flow velocity, then calculate the Reynolds number according to the viscosity, density and pipe diameter of water, and then calculate the drag coefficient along the pipeline according to the Reynolds number, and check the table for the equivalent pipe length of the pipe fittings (such as tee, elbow, valve, reducer, etc.), Finally, the total pipeline pressure loss is calculated by the resistance coefficient along the pipeline and the total length of the pipeline (including the equivalent pipe length), and the actual flow rate is calculated according to Bernoulli. Then, the actual flow rate is calculated according to the above process until they are close to each other (iterative trial method). Therefore, few people do this calculation in practice, basically choose different flow rates according to the size of the pressure difference, and calculate according to the first method
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