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Unread 01-17-2003, 01:11 PM   #13
BillA
CoolingWorks Tech Guy
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Join Date: Dec 2000
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I've seen roughness values ("e") for pvc and pe (and glass) - somewhere
extrapolate from the chart in #410

I have some data on 14" 90^ 'ells' from silicone hose of different dia.s, I'll try to get it written up
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