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the flow rate supplied to a farm that receives water from a water source must be calculated, the friction losses are calculated using the darcy-weisbach equation and the necessary pipe is designed to supply the required flow rate. the necessary diameter must be calculated using iteration by successive approximations to find the friction factor F of the Colebrook-White equation in the following link you can download the excel that I explain in the video to use in your pipe flow designs http://www.mediafire.com/file/sy9i60x...