not per ft,per square inch.Pounds of water in a pipe calculation is pipe length in feet x pipe diameter squared x 0.34..sort of like killing a well by weighting up mud you simply add chemicals and solids to water (or oil) to raise wieght of column of fluid above formation to hold the pressure( you cant add more water than your well will hold ,so you have to make it heavier) .if you raise the pressure higher than your pump can out put it wont flow,same exact deal. or you can think of it this way,theres alot more square inches inside a 6 inch pipe than there is a 1/4 inch pipe.
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Today's Featured Article - A 1937 John Deere Unstuck - by Gary Hickman. Here is my story of how I got the pistons out of a 1937 JD B that the engine had been stuck for about 14 years: About 12 years ago my Dad gave me one of the tractors I ran as I was growing up on our farm in central Nebraska. The engine on this tractor, a 1937 John Deere "B", had been stuck for 2 years before he gave it to me. This last spring (1999) I hauled the tractor to our 2 acre lot in St. Libory Nebraska where it joined my antique machinery collection, at that time a 1929 Caterpillar T
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