Document DG50p8k25aYb1JENJGqaEJw4Q
HEATING VENTILATING AIR CONDITIONING CUIDE 1940
Table 1. Equivalent Length of Pipe vs. Pressure Head at Various Friction Losses Steel Pipe
Head Loss,
Fr
Miunch Friction Loss Per Foot of Pipe 720 480 360 300 240 ISO 160 144 120 96 90 80 70 60
Equivalent Length of Pipe in Feet
2 2X 3
3X 4
5 ex 6
ex 7 >x
8 ex 9
9X 10 10X
11
UX
12
33 42
50 66 62 84
80 100 133 100 125 167
150 188
167 200 250 270 300 340 208 250 312 333 375 428
400 500
50 75 100 120 150 200 225 .250 300 375 400 450 510 600
59 87 117 140 175 233 .263 291 350 437 463 525 593 700 67 100 133 160 200 266 300 333 400 500 533 600 685 800 75 112 149 180 225 300 338 374 450 562 593 675 758 900
83 125 167 200 250 333 375 416 500 625 666 750 860 1000 92 137 183 220 275 366 413 457 550 687 713 825 923 1100 100 150 200 240 300 400 450 500 600 750 800 900 1030 1200
108 162 217 260 325 433 488 540 650 812 843 975 1088 1300 116 175 233 280 350 465 525 580 700 875 933 1050 1200 1400 124 187 249 300 375 500 563 623 750 937 973 1125 1252 1500
133 200 266 320 400 533 600 666 800 1000 1070 1200 1370 1600 142 212 283 340 425 566 638 706 850 1062 1103 1275 1417 1700 150 225 300 360 450 600 675 750 900 1125 1200 1350 1540 1800
159 237 317 380 475 633 713 789 950 1187 1233 1425 1577 1900 167 250 333 400 500 666 750 833 1000 1250 1333 1500 1715 2000 175 262 349 420 525 700 788 872 1050 1312 1363 1575 1737 2100
183 275 366 440 550 733 825 916 1100 1375 1466 1650 1885 2200 192 287 383 460 575 766 863 955 1150 1437 1533 1725 1897 2300 200 300 400 480 600 800 900 1000 1200 1500 1600 1800 2030 2400
Nominal Pipe Size,
Capacity of Pipes Mbh With a 20 F* Drop
A Carrying Capacity, B = Velocity, inches Per second Friction Head of Pipe Milinches per foot
A
XB
A %B
A 1B
A IX B
A IX B
A 2B
`A 2X B
A SB
A 3X B
A 4B
A 5B
-A 6B
720 480 360 300 240 180 160 144 120 96 .90 80 70 60
20 16 14 13 11 10 9 9 8 7 7 6 6 27 22 19 17 15 18 12 11 10 9 9 8 8
5 7
43 35 30 27 24 21 19 18 17 15 14 13 12
SS 26 28 21 18 16 16 14 18 11 11 10
9
11 9
85 70 60 54 48 41 39 36 33 30 28 27 25 89 82 27 26 22 19 .18 17 16 13 18 12 11
23 10
180 145 125 115 98 85 80 75 68 60 58 55 51 48 89 88 SO 27 28 21 20 19 16 15 16 u
47 12
285 230 195 180 160 135 125 120 110 96 92 88 82 64 44 88 34 80 26 34 28 21 19 18 17 16
75 H
540 435 370 340 300 255 240 230 205 180 175 165 150 140
64 62 46 40 86 SO 29 . 27 84 22 21 20 19
17
890 720 610 550 480 420 390 370 330 300 280 270 250 230
74 60 60 48 41 86 S3 81 28 84 84 22 21
19
1650 1340 1130 1000 900 760 720 670 600 540 520 480 450 410
88 70 60 84 48 41 88 36 88 29 28 26 84
22
2500 2000 1700 1500 1350 1150 1080 1000 900 800 760 720 670 620 99 78 66 60 84 46 4S 40 38 82 81 29 27. 25
3500
no
2800 87
2400 74
2200 66
1900 68
1600 60
1520 47
1440 48
1300 40
1150 85
1100 84
1050 82
960 80
880 27
7000 5600 4700 4300 3700 3200 3000 2750 2500 2200 2100 2000 1800 1700
188 106 90 80 70 60 68 68 48 42 41 88 85
82
12.000 9200 7800 7000 6200 5200 4800 4600 4100 3600 3500 3300 3000 2800
. 166 184 104 94 88 . 09 64 61
66 . 48 . 46 44 .41
87
For other temperature drops the pipe capacities may be changed correspondingly.' For example, with' a temperature drop of 30 F, the capacities shown in this table are to be multiplied.by 1.5.
314
CHAPTER 17. HOT WATER HEATING SYSTEMS AND PIPING
Table 2. Equivalent Length of Tube vs. Pressure Head at Various Friction Losses Type L Copper Tube
Milinch Friction Loss per Foot of Tube
,
HEAD LOSS.
720 600 480
360
300
240
ISO
150
120
90
75
60
FT
Equivalent Length of Tube IN FEE! (LONGI1ST ClRCurr)
------------ 2 2H 3
50
40 60
50
63 75
67
83 100
80
100 120
100 133 160 125 167 200 150 200 240
200 267 320 250 333 400 300 400 480
-- 75
70 88 80 100 90 113
117 133 150
140 175
160 200 180 225
233 267
300
280 320
360
350
400 450
467 560 533 640 600 720
100 125 167 110 138 183 6 100 120 150 200 130 163 217 140 175 233
7X 125 150 188 250
160 200 267 170 213 283 9 150 180 225 300
200 250 333 400 220 275 367 440 240 300 400 480
260 325 433 520 280 350 467 560 300 375 500 600
320 400 533 640 340 425 567 680 360 450 600 720
500 667 800 550 733 880 600 800 960
650 867 1040 700 933 1120 750 1000 1200
800 1067 1280 850 1133 1360 900 1200 1440
159 190 238 200 250
317 333
380 400
475 500
633 667
760 950 1267 1520 800 1000 1333 1600
iok
175 210 263 350
420
525
700
840 1050 1400 1680
12
183 220 275 192 230 288 200 240 300
367
383 400
440 460
480
550
575 600
733 767 800
880 1100 1467 1760 920 1150 1533 1840 960 1200 1600 1920
Capacity op Tubes Mbh With a 20 F* Drop
Nominal
a = Carrying Capacity, B = Velocity, inches per second
Tube
Friction Head of Pipe Milinches per Foot
Sirs,
In. 720 600 480 360 300 240 180 150 120 90
75
HB
A HB
A HB
A XB
A 1B
10 9 8 6.8 27 84 . 21 18
20 18 16 13.5 S3 80 26 21
36 30 26 22.1 57 34 50 84
51 46 40 34 48 88 55 27
104 94 82 70 48 48 89 84
6.2 16
12 19
20 21
31 84
63 80
5.4 14
10.8 17
17.8 19
28 21
56 26
4.6 18
9 16
16 17
23.2 19
47 22
4 11
8 IS
13.1 16
20.6 17
42 19
3.6 10
7 12
11.8 IS
18.1 14
37 17
3 2.8 8.5 8
6 5.4 10 9
9.9 11
9 10
15.3 12
13.9 11.6
32 - 28 14.6 13
A 185 169 149 125 112 100 84 76 66 56. 50
IX B
65 61 48 89
86
80
26
22
19
17
15
A 300 270 235 200 180 160 134 120 105 90 81
IX B
62 67 61 43
59
36
SO
25
22
19
17
A 625 560 495 420 375 335 280 260 200 188 170 .
2B
76 68 69 61 : 47
48
86
82
27
22
20
A 1130 1010 890 750 680 600 500 450 395 335 305
iX B
90 80 69 68
49
47
48
57
55
26
28
A 1840 1650 1450 1210 1100 980 820 740 660 550 490
3B
88 90 SO 66
69
62
47
48
86
SO
27
A 2750 2480 2170 1840 1650 1450 1210 1100 980 820 740 3M B 110 100 89 75 66 57 61 48 40 86 SO
A 3900 3505 3100 2600 4 B 120 108 96 88
2350 75
2090 63
1760 65
1680 49
1390 44
1180 57
1080 54
400 500 600
700 800 900
1000 1100 1200
1300 1400 1500
1600. 1700 1800
1900 2000 2100
2200 2300 2400
60
2.4 7
4.7 8
7.9 9
12.1 10
25 12
44 IS
71 16
150 18 .
270 21
420 28
650. 26
950 29
For other temperature drops the pipe capacities may be changed correspondingly. For example, with a temperature drop of 30 F the capacities shown in this table are to be multiplied by 1.5.
315