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By American Water Works Association.; American National Standards Institute

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Extra info for AWWA standard for polyvinyl chloride (PVC) water transmission pipe, nominal diameters 14 in. through 36 in

Example text

56 psi Continue this procedure for all stations. 4. 00 psi Licensee=ATLATEC S A DE C V/5972499002 Not for Resale, 03/18/2009 14:57:29 MDT PVC PRESSURE PIPE AND FABRICATED FITTINGS 21 Step 6: Select the appropriate pipe DR for each section of the pipeline. Step 3 determined that DR 21 has a WPR for this example of at least 128 psi. , the WPR of the next pipe DR in this example). The point at which the pressure drops to 98 psi is determined using the pressure gradient from station 80 + 00 to 160 + 00.

00 psi Licensee=ATLATEC S A DE C V/5972499002 Not for Resale, 03/18/2009 14:57:29 MDT PVC PRESSURE PIPE AND FABRICATED FITTINGS 21 Step 6: Select the appropriate pipe DR for each section of the pipeline. Step 3 determined that DR 21 has a WPR for this example of at least 128 psi. , the WPR of the next pipe DR in this example). The point at which the pressure drops to 98 psi is determined using the pressure gradient from station 80 + 00 to 160 + 00. , 330 ft downstream of 80 + 00). Thus, DR 25 can be used beginning at (80 + 00) + (3 + 30) = 83 + 30.

20 AWWA C905-97 Where: f Q di C = = = = = friction loss, ft of H2O/100 ft flow rate, in gallons per minute pipe internal diameter, in inches flow coefficient 150 for PVC pipe Substituting for 20-in. 118 psi per 100 ft of pipeline --``,,,,``,``,`,`,````,,`,,````-`-`,,`,,`,`,,`--- Step 5: Determine the working pressures at key points under steady state, full flow conditions. The working pressure (P), is the sum of the static head due to elevation and the friction loss. 56 psi Continue this procedure for all stations.

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