On the relationship between the pipeline length, inside diameter, compressed air pressure and time required for raw milk transportation through polyethylene pipe on level land

1) To furnish technological basis for the design of equipments for level land transportation of raw milk, experiments were conducted by using water instead of raw milk and polyethylene pipeline with inside diameter of 0.029m. And, a theoretical analysis was conducted upon basis of that, at a time point when the water-flow came to an optional position of the pipeline the following equation is attainable; From above equation a theoretical formula was derived by approximate calculation as below. 2) The actually observed values of t well agreed with the values calculated from formula (5) when 0.03 was substituted for λ. 3) In case of raw milk transportation by means of polyethylene pipeline with inside diameter of 0.029m, the equipments could be designed upon basis of calculation by the same formula except for substituting 0.035 for λ.