Calculation of steam pipe diameter
Thread Content
1. Dear experts, the flow rate required is 180 tons per hour of saturated steam at 2.0 MPa, with a flow velocity of 30 m/s. Please help calculate the required pipe diameter and provide the calculation formula. Thank you
It has been found that the density of steam at 2.0 MPa is approximately 10 kg/cubic meter; therefore, a volume of 180 tons per hour equals 18,000 cubic meters； Flow rate ÷ 3600 ÷ flow velocity ÷ 3.14 = r squared; taking the square root gives the radius, and multiplying by 2 yields the diameter of the pipe.
Thank you. Could the expert please share the software?
This post was last edited by Little Chemical Engineer on 2022-2-17 at 13:26. I’d like to ask: What does “initially selected inner diameter greater than 100 meters for line 15” mean? ? How is the margin taken into account? ? ? Was the flow rate calculated at 20 m/s?
Line 15 is calculated using another formula. Line 14 is the conventional method, using flow velocity for estimation. 15 rows are used because the length is greater than 100 meters; it can be treated as a long-distance pipeline, and the pressure drop per 100 meters can be utilized for estimation. For steam at 2.0 MPa, a pressure drop of 100 meters is considered to be 3% of the pressure; therefore, the value in row 13 should be 60 – I made a mistake in my calculations. The calculation is based on HG20570.6. In actual calculations, if the distance is less than 100 meters, only the first calculation method is used.