Guide **Question Set 3-35
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3.35 A water tower is to be constructed to supply water to a factory. The length of the pipe from the water tower to the factory (including equivalent lengths) is 500 m, the maximum flow rate is 20 × 10-3 m³/s, and a head of 10 m of water column must be maintained at the end of the main pipe. Select two flow rates within the typical range for such pipes, and calculate the required pipe diameter and height of the water tower for each case. Solution: (1) Take the flow velocity inside the pipe as u=1 m/s and the diameter as d=0.159 m. According to the specifications for water pipes, a 6\" steel pipe is used, with an inner diameter of d=156 mm and a wall roughness of ε=0.2 mm. Questions: (1) The diameter is 159 mm, but 156 is used; the actual water flow velocity is greater than the assumed value of 1 m/s. Can the pipe withstand this? (2) Where can I find the specifications for water pipes?
Regarding the principles of chemical engineering, I know there is a **industry standard for the chemical sector, which outlines various series of dimensions for seamless and welded steel pipes used in chemical piping systems. As for whether such pipes can withstand certain pressures, it seems to depend on the pressure rating; pipes with the same nominal diameter but different wall thicknesses can be chosen depending on the required pressure level. It’s being implemented now. If there’s anything wrong, I’d appreciate guidance from the experts here