Posted by showcrop on May 24, 2022 at 03:49:13 from (75.68.37.174):
In Reply to: Water Line Size posted by Danny Prosser on May 23, 2022 at 12:37:29:
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Mark, I expect that the difference is most likely due to the flow value. We fire service pump operators are required to understand the relationship between flow rate and friction loss. I used friction loss tables of Hunter Industries, they are an irrigation supply company. I agree that it is strange that so many think that flow of a liquid is limited by any small diameter part of the over-all installation.The situation is simply that friction loss, which is what reduces the flow, is a function of distance. If the length is insignificant with respect to the whole installation so will the pressure drop be insignificant. Liquids are flexible. The flow will bend around corners. It will flow just a little faster through a restriction and then speed right up again. If it is necessary to have a larger diam. pipe than the calculations call for why not two inch? why not four inch? Why not twelve inch? It will be expensive to go back and replace the four inch pipe with twelve inch.
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