Pacific Pump and Power

Pacific Pump And Power-Free PDF

  • Date:18 Jan 2020
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Friction Loss in Pipe,Losses Due to Friction, As water moves through the pumping system pressure losses occur due to water contact with. pipes valves and fittings The four factors that determine friction losses in pipe are. 1 The velocity of the water Water velocity is measured in feet per second As velocity. increases pressure losses increase Velocity is directly related to flow rate An increase or. decrease in flow rate will result in a corresponding increase or decrease in velocity. 2 The size inside diameter of the pipe Smaller pipe causes a greater proportion of the. water to be in contact with the pipe which creates friction Pipe size also affects velocity. Given a constant flow rate decreasing pipe size increases the water s velocity which. increases friction, 3 The roughness of the inside of the pipe Pipe inside wall roughness is rated by a C. factor which is provided by the manufacturer The lower the C value the rougher the inside. and the more pressure loss due to friction, 4 The length of the pipe The friction losses are cumulative as the water travels through the. length of pipe The greater the distance the greater the friction losses will be. Losses Due to Elevation Change, Water pressure can be expressed as either psi pounds of pressure per square inch or feet. of head A column of water 1 foot high exerts 0 433 psi at the bottom and therefore 1 psi is. equivalent to 2 31 feet of head This means that for every foot of elevation change from the. pump to the discharge point the corresponding change in pressure will be 0 433 psi. Fresh Water Salt Water,1 foot of head 0 433 psi 1 foot of head 0 444 psi.
1 0 psi 2 31 feet of head 1 0 psi 2 25 feet of head. Friction Loss Table,Head Loss 100 Feet Pipe Due to Friction C 150. C 150 for High Density Polyethylene Pipe HDPE,Pipe Diameter Inch. 1 1 1 2 2 3 4 5 6 8 10 12,0 5 0 8 0 1,1 2 9 0 4 0 1. 2 10 5 1 5 0 4 0 1,3 22 2 3 1 0 8 0 3 0 1,4 37 9 5 3 1 3 0 4 0 2. 5 57 2 7 9 2 0 0 7 0 3 0 1,10 28 6 7 1 2 4 1 0 0 2 0 1.
15 60 6 14 9 5 0 2 1 0 5 0 2 0 1,20 25 4 8 6 3 5 0 9 0 3 0 1. 30 53 8 18 2 7 5 1 8 0 6 0 3 0 1,40 91 7 30 9 12 7 3 1 1 1 0 4 0 1. 50 46 7 19 2 4 7 1 6 0 7 0 2 0 1,60 65 5 26 9 6 6 2 2 0 9 0 2 0 1. 70 87 1 35 8 8 8 3 0 1 2 0 3 0 1,80 45 9 11 3 3 8 1 6 0 4 0 1 0 1. 90 57 0 14 1 4 7 2 0 0 5 0 2 0 1,100 69 3 17 1 5 8 2 4 0 6 0 2 0 1.
150 36 1 12 2 5 0 1 2 0 4 0 2,200 61 6 20 8 8 5 2 1 0 7 0 3 0 1. 250 93 0 31 4 12 9 3 2 1 1 0 4 0 1,300 44 0 18 1 4 5 1 5 0 6 0 2 0 1. 400 74 8 30 8 7 6 2 6 1 1 0 3 0 1,500 46 5 11 5 3 9 1 6 0 4 0 1 0 1. 600 65 2 16 1 5 4 2 2 0 5 0 2 0 1,700 86 7 21 4 7 2 3 0 0 7 0 2 0 1. 800 27 4 9 2 3 8 0 9 0 3 0 1,900 34 0 11 5 4 7 1 2 0 4 0 2.
1000 41 3 13 9 5 7 1 4 0 5 0 2,1200 57 9 19 5 8 0 2 0 0 7 0 3. 1500 87 5 29 5 12 1 3 0 1 0 0 4,2000 50 3 20 7 5 1 1 7 0 7. 3000 43 8 10 8 3 6 1 5,4000 74 6 18 4 6 2 2 6,5000 27 8 9 4 3 9. 1 Values shown above are used in the Hazen Williams Equation for flow in pipes. Feet of head loss values shown in the tables were developed using the. Hazen Williams equation, 2 Feet of head loss values are subject to the following conditions. a Pipes carrying clear water at approximately 60 F 15 6 C. b Pipes are flowing full, c Velocities of water are generally less than 10 feet per second.
Note HDPE is commonly sized by outside diameter If in doubt use the next smaller pipe size. Friction Loss in Pipe Fittings, Steel Copper Equivalent feet of pipe caused by joint diam Inch. Fitting 1 1 1 2 2,90 Std Elbow 1 6 2 1 2 6 3 5 4 0 5 5 6 2. 90 Long Elbow 1 0 1 4 1 7 2 3 2 7 4 3 5 1,90 Street Elbow 3 0 3 4 4 4 5 8 6 7 8 6 10 3. 45 Std Elbow 0 8 1 1 1 4 1 8 2 1 2 8 3 3,45 Street Elbow 1 0 1 8 2 3 3 0 3 5 4 5 5 4. Square Elbow 3 0 3 9 5 0 6 5 7 6 9 8 11 7,Std T Flow Run 1 0 1 4 1 7 2 3 2 7 4 3 5 1.
Std T Flow Branch 4 0 5 1 6 0 6 9 8 1 12 0 14 3,Gate Valve Open 0 7 0 9 1 1 1 5 1 7 2 2 2 7. Plastic Equivalent feet of pipe caused by joint diam Inch. Fitting 1 1 1 2 2,90 Std Elbow 4 5 6 7 8 9 10,Std T Flow Run 4 4 4 5 6 7 8. Std T Flow Branch 7 8 9 12 13 17 20,Friction Loss Estimates based on Pipe Lengths. Note Determine total run of hose pipe in pumping system and calculate friction loss. at a given flow rate Add Friction Loss in head feet to vertical elevation from suction. point to discharge point to determine total dynamic head. Flow Hose Size Velocity 100 500 1000 1500 2000,100 4 2 5 sec 0 8 4 8 12 16. 200 4 5 0 sec 2 9 14 5 29 43 5 58,300 4 7 6 sec 6 1 30 5 61 91 5 122.
400 4 10 1 sec 10 4 52 104 156 208,400 6 4 4 sec 1 4 14 21 28. 600 6 6 7 sec 3 1 15 5 31 46 5 62,700 6 7 8 sec 4 1 20 5 41 61 5 82. 800 6 8 9 sec 5 2 26 52 78 104,800 8 5 1 sec 1 3 26. 900 6 10 0 sec 6 6 33 66 99 132,900 8 5 8 sec 1 6 32. 1000 6 11 1,11 1 sec 7 8,7 8 39 78 117 156,1000 8 6 4 sec 2 0 30 40.
1100 8 7 0 sec 2 3 11 5 23 34 5 46,1200 8 7 7 sec 2 7 13 5 27 40 5 54. 1300 8 8 3 sec 3 1 15 5 31 46 5 62,1400 8 9 0 sec 3 6 18 36 54 72. 1500 8 9 6 sec 4 1 20 5 41 61 5 82,1600 8 10 3 sec 4 7 23 5 47 70 5 94. 1800 8 11 5 sec 5 6 28 56 84 112,1800 12 5 1 sec 0 8 16. 2000 8 12 8 sec 7 0 35 70 105 140,2000 12 5 7 sec 0 9 13 5 18.
2500 12 7 1 sec 1 5 7 5 15 22 5 30,8 5 sec 2 1,3500 12 9 9 sec 2 7 13 5 27 40 5 54. 4000 12 11 4 sec 3 5 17 5 35 52 5 70, Numbers in bold and italics represent dynamic head levels that exceed pump. Note Determine total run of hose pipe in pumping system and calculate friction loss at a given flow rate Add Friction Loss in head feet to vertical elevation from suction point to discharge point to determine total dynamic head Friction Loss Estimates based on Pipe Lengths Page 4 Flow Hose Size Velocity 100 500 1000 1500 2000

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