Cooling Water - Pipe Lines
Sizing cooling water pipe lines - maximum allowable flow, velocity and pressure drops.
Main Pipes - maximum allowable flow, velocity and pressure drop
Pipe Size (in) | Flow | Velocity | Pressure Drop | |||
---|---|---|---|---|---|---|
(US gpm) | (liter/s) | (ft/s) | (m/s) | (ftH2O/100 feet) | (Pa/100 m) | |
4 | 140 | 9 | 3.5 | 1.1 | 2.2 | 21827 |
6 | 380 | 24 | 4.2 | 1.3 | 1.9 | 18877 |
8 | 650 | 41 | 4.2 | 1.3 | 1.4 | 13371 |
10 | 1100 | 69 | 4.2 | 1.3 | 1.2 | 11700 |
12 | 1800 | 114 | 4.5 | 1.4 | 1.2 | 12093 |
14 | 2200 | 139 | 5.1 | 1.6 | 1.1 | 11208 |
16 | 3300 | 208 | 5.9 | 1.8 | 1.2 | 11405 |
18 | 4500 | 284 | 6.2 | 1.9 | 1.2 | 11503 |
20 | 6000 | 379 | 6.7 | 2.0 | 1.2 | 11503 |
24 | 11000 | 694 | 7.8 | 2.4 | 1.2 | 11700 |
30 | 19000 | 1199 | 8.7 | 2.6 | 1.1 | 10913 |
3 | 70 | 4 | 3.0 | 0.9 | 2.3 | 22712 |
Lateral Pipes - maximum allowable flow, velocity and pressure drop
Pipe Size (in) | Flow | Velocity | Pressure Drop | |||
---|---|---|---|---|---|---|
(US gpm) | (liter/s) | (ft/s) | (m/s) | (ftH2O/100 feet) | (Pa/100 m) | |
4 | 200 | 13 | 5.1 | 1.5 | 4.3 | 42179 |
6 | 500 | 32 | 5.6 | 1.7 | 3.2 | 31364 |
8 | 900 | 57 | 5.8 | 1.8 | 2.5 | 24383 |
10 | 1500 | 95 | 6.1 | 1.9 | 2.1 | 20745 |
12 | 2400 | 151 | 6.8 | 2.1 | 2.1 | 20647 |
14 | 3100 | 196 | 7.2 | 2.2 | 2.1 | 20647 |
16 | 4500 | 284 | 7.9 | 2.4 | 2.1 | 20549 |
18 | 6000 | 379 | 8.3 | 2.5 | 2.0 | 19565 |
3 | 100 | 6 | 4.3 | 1.3 | 4.5 | 43949 |
Related Topics
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Piping Systems
Calculate dimensions of pipes and tubes. Pressure drop calculations and head loss charts. Use of different piping materials. Insulation of pipes and tubes and heat loss diagrams.
Related Documents
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Calculating Cooling Loads
Calculating chiller and cooling tower refrigeration loads - in tons. -
Chilled Water Systems
Chilled water system equations - evaporator and condenser flow rates. -
Cooling Tower Efficiency
Maximum cooling tower efficiency is limited by the cooling air wet-bulb temperature. -
Insulation of Cooling Systems
Cooling systems and insulation thickness. -
Water - Absolute (Dynamic) Viscosity vs. Temperature and Pressure
Absolute viscosity for water in centipoises for temperatures between 32 - 200oF. -
Water Systems - Maximum Flow Velocities
Water velocities in pipes and tubes should not exceed certain limits.