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Quick Selection of Cooling Pipe Size Max Friction Loss 4ft/100ft of Pipe (4%)

The document provides a table with information to help select the appropriate size of cooling pipe for a system. The table lists various pipe sizes from 1/2 inch to 12 inches and specifies for each size the maximum gallons per minute and flow velocity as well as the corresponding maximum cooling capacity in BTU/hr and tons for two different temperature drop scenarios of 5°C and 5.5°C. The maximum friction loss is also listed as 4 feet per 100 feet of pipe or 4% for all pipe sizes.

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Bassel El Sayed Ali
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203 views2 pages

Quick Selection of Cooling Pipe Size Max Friction Loss 4ft/100ft of Pipe (4%)

The document provides a table with information to help select the appropriate size of cooling pipe for a system. The table lists various pipe sizes from 1/2 inch to 12 inches and specifies for each size the maximum gallons per minute and flow velocity as well as the corresponding maximum cooling capacity in BTU/hr and tons for two different temperature drop scenarios of 5°C and 5.5°C. The maximum friction loss is also listed as 4 feet per 100 feet of pipe or 4% for all pipe sizes.

Uploaded by

Bassel El Sayed Ali
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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QUICK SELECTION OF COOLING PIPE SIZE

Max Friction loss = 4ft/100ft of pipe (4%)

MAX MAX
PIPE SIZE MAX LOSS CORR. 
BTU/hr TONS
(in) GPM % VELOCITY ft/s
(ΔT = 5° C) (ΔT = 5° C)
1/2" 1.80 4.00 2.00 8,100 0.68
3/4" 3.90 4.00 2.40 17,550 1.46
1" 7.60 4.00 2.80 34,200 2.85
1 1/4" 16.00 4.00 3.40 72,000 6.00
1 1/2" 24.00 4.00 3.80 108,000 9.00
2" 45.00 4.00 4.40 202,500 16.88
2 1/2" 73.00 4.00 5.00 328,500 27.38
3" 135.00 4.00 5.80 607,500 50.63
4" 270.00 4.00 6.50 1,215,000 101.25
5" 480.00 4.00 7.00 2,160,000 180.00
6" 700.00 3.20 7.00 3,150,000 262.50
8" 1200.00 2.40 7.00 5,400,000 450.00
10" 1850.00 1.70 7.00 8,325,000 693.75
12" 2800.00 1.40 7.00 12,600,000 1,050.00
QUICK SELECTION OF COOLING PIPE SIZE
Max Friction loss = 4ft/100ft of pipe (4%)

MAX MAX
PIPE SIZE MAX LOSS CORR. 
BTU/hr TONS
(in) GPM % VELOCITY ft/s
(ΔT = 5.5° C) (ΔT = 5.5° C)
1/2" 1.80 4.00 2.00 9,000 0.75
3/4" 3.90 4.00 2.40 19,500 1.63
1" 7.60 4.00 2.80 38,000 3.17
1 1/4" 16.00 4.00 3.40 80,000 6.67
1 1/2" 24.00 4.00 3.80 120,000 10.00
2" 45.00 4.00 4.40 225,000 18.75
2 1/2" 73.00 4.00 5.00 365,000 30.42
3" 135.00 4.00 5.80 675,000 56.25
4" 270.00 4.00 6.50 1,350,000 112.50
5" 480.00 4.00 7.00 2,400,000 200.00
6" 700.00 3.20 7.00 3,500,000 291.67
8" 1200.00 2.40 7.00 6,000,000 500.00
10" 1850.00 1.70 7.00 9,250,000 770.83
12" 2800.00 1.40 7.00 14,000,000 1,166.67

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