Calculation of natural gas pipeline diameter
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The workshop plans to install a gas pipeline with a consumption of 1,000 m3/h; the pressure at the supply end is approximately 0.3–0.4 MPa, and the length of the pipeline is around 1 km
Is it really that big? It is planned to use DN50. . . . Ask for the calculation method
Calculate the flow rate and pressure drop for DN50 by yourself.
I don’t know how to calculate it; I’m seeking advice. . . How to choose pipes without making mistakes
This post was last edited by MapleLeafVSBaoEr on 2015-12-13 at 19:04. The flow velocity of low-pressure gases is generally taken as 10–20 m/s; using u=15, we get d=√(4V/πu), which equals 0.1535 m. With DN=150, the calculated velocity is 15.72 m/s. Ignoring the pressure losses due to pipe fittings, turbulence definitely occurs. To find the resistance coefficient λ, the pressure drop is given by λ(L/d)(ρU²/2). If the pressure drop is high, the velocity should be reduced and the values recalculated, as velocity is proportional to the pressure drop
This post was last edited by bfdlwolf on 2015-12-16 at 15:50. The natural gas consumption is usually given on a standard condition basis; please clarify whether the flow rate refers to standard conditions or actual conditions (0.3~0.4 MPa) If it is the flow rate under standard conditions, the pipe diameter is approximately DN80~100. If it is the consumption under actual conditions, the pipe diameter is approximately DN150~200