Document xjwN5ZqB8aq94MKOmwpv6Y34G

HEATINC VENTILATING AIR CONDITIONING GUIDE 1944 Table 1. Heat-carrying Capacity of Standard Black Pipes with Temperature Drop of 20 Fa Nominal Pipe Sizes % in. to IS in., and Friction Heads 4 to 800 milinches per foot (A = Capacity, Mbh. B = Velocity, inches per second) (One milinch equals 0.001 in.) Miunch Fric tion Loss PER Foot or Pipe 4A 6A 8A 10 A . 12 A 14 A 10 A 20 A . 25 A - 30 A 35 .. 40 A A 50 A .. 60 A- ,70 A .80 A 100 A l 150 r A ' 200 A 300 , 400 A B A 500 A B 600 A B 800 A Nominal Pipb Size, Inches X X X 1 IX IX 2 2X 3 3X 4 5 6 8 10 12 0.75 1.35 2.85 1.5 1.7 2.1 5.4 11.3 17.0 33.0 53.1 2.4 2.9 3.2 3.8 47 95 141 5.0 57 197 363 596 1250 2320 3730 6.0 77 7.9 9.6 11 12 0.9 1.7 3.6 6.75 14.0 21.2 417 66.4 119 2.6 3.0 3.6 4.0 4.7 57 .67 176 248 456 748 1570 2920 4690 6.9 77 8.8 10 12 14 16 1.05 2.0 2.5 4.2 3.0 7.9 16.4 24.8 48.4 77.9 Sal 4.2 4.7 ,5.6 6.3 140 77 207 291 535 8.0 8.8 10 879 1850 3440 5520 12 14 17 19 IJ2 2.2 2.8 4.7 3.4 8.9 18.6 28.0 54.7 88.1 4.0 43 5.3 6.3 7.1 158 8.2 234 329 605 997 2100 3910 6270 9.1 9.9 12 13 16 19 27 1.35 2.45 3.1 5.2 3.7 9.8 20.5 31.0 60.4 97.4 4.4 S3 5.0 6.9 77 175 9.1 259 364 10 11 671 1100 2320 4330 6950 13 15 18 21 24 1.45 2.65 5.65 10.7 223 33.7 657 3.4 4.1 4.8 5.7 6.4 7.6 106 87 190 9.9 282 11 397 12 731 1200 2530 4730 7590 14 16 20 23 26 1.55 25 6.05 11.5 24.0 36.3 70.8 3.6 4.4 5.1 6.2 6.9 8.1 114 9.7 205 11 303 12 428 13 787 1300 2730 5100 8190 15 17 . 21 25 28 1.75 3.25 6.85 13.0 .27.1 41.0 80.0 3.5 4.9 5.8 7.0 7.7 93 129 10 232 12 344 13 484 15 892 1470 3100 5790 9300 17 20 24 28 32 2JO 3.65 7.75 14.7 30.6 46.3 903 4X1 4.6 5.6 6.5 7.9 8.8 10 146 12 263 14 389 15 548 1010 1670 3510 6570 10560 17 19 22 27 32 36 2.2 4.4 4.0 8.55 16.2 33.8 51.2 5.1 6.1 73 8.7 9.7 100 11 162 13 290 430 15 17 607 1120 1850 3900 7280 11710 18 ' 22 25 30 35 40 2.35 4.4 5.5 9.3 17.6 36.8 557 6.7 7.9 9.5 11 109 13 176 316 469 661 1220 2010 4250 7940 12780 14 16 18 20 23 27 33 39 44 2.55 5.1 4.7 10.0 18.9 39.6 59.9 5.9 13, 8.4 10 11 117 13 189 15 341 18 505 20 71?. 1320 2170 4580 8570 13760 22 25 29 35 42 47 2.85 5.3 113 21.4 '44.7 67.7 6.7 8.1 9.5 12 13 133 214 386 672 807 1490 2460 5190 9720 15650 15 17 20 22 24 29 33 40 47 54 3.15 5.85 12.4 23.6 49.4 74.9 6.3 7.4 8.9 11 13 14 147 17 238 427 633 19 . 22 .. 25 893 1650 2730 5760 10780 17360 27 32 36 44 52 60 3.45 6.35 13.5 25.7 53.8 81.4 6.9 8.0 9.7 11 14 15 160 18 258 21 465 24 690 .27 973 *1800 2970 6280 11760 18950 29 . 35 40 . 48 57 65 3.7 7.4 6.8 14.5 27.6 .57.9 87.6 8.6 10 12 15 17 172 20 278 500 22 26 743 1050 1940 3200 6770 12690 20440 29 32 37 43 52 62 70 4.15 8.3 7.7 16.4 31.1 65.4 99.0 9.7 12 14 17 19 194 22 314 25 566 30 840 1190 2200 3630 7680 14400 23200 33 - 36 42 48 59 . 70 80 5.2 10 9.6 20.4 38.8 81.6 12 - 15 17 21 124 23 243 28 393 32 709 1050 1490 2760 4560 9650 18120 29220 37 41 45 53 61 74 88 101 6.05 11.2 23.9 45.4 95^5 12 14 17 .20 25 145 27 285 33 461 37 832 1240 1750 3240 5360 11350 21320 34400 43 '48 53 62 71 - 87 104 118 7.5 13.9 29.7 56.6 119 15 18 31 25 .. 31 181 34 356 41 577 1040 1550 2190 4060 6730 14270 26830 43300 46 54 . 60 .66 78 90 110 131 149 8.75 16.2 3417 66.2 18 21 26 30 140 36 212 40 417 48 676 1220 1820 2570 4780 7910 16790 31580 51000 54 64 71 78 92 105 129 154 175 9.85 18.3 39.2 74.8 20 23 29 33 158 41 239 45 471 54 765 1380 2060 2910 5410 8970 19040 35840 57880 62 72 80 * 88 104 119 ' 147 174 199 10.9 20.2 43.2 82.5 22 26 32 37 174 45 264 50 521 60 846 1530 2280 3220 5990 9930 21100 39740 64210 68 80 89 97 115 132 162 193 221 12.7 23.6 50.5 96.5 25 30 37 : 43 204 310 52 - 59 610 70 992 1790 2670 3780 7030 11670 24820 46780 75620 80 94 - 104 114 135 155 191 228 260 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. 306 CHAPTER 16. HOT WATER HEATINC SYSTEMS AND PIPING Table 2. Heat-carrying Capacity of Type L Copper Tubing with Temperature Drop of 20 Fa Nominal Tube Sizes Vs in. to 4 in., and Friction Heads 60 to 7SO milinches per foot (A = Capacity, Mbh. B = Velocity, inches per second) (One milinch equals 0.001 in) Nominal Tube Pi**, In. -- X --------- X -- X -- X ----------- - 1 ----------- IX B B B B B B IX B 2B 2X B 3B iX B 4B Milinch Friction Loss per Foot of Tube 720 600 10 9 27 24 20 18 35 30 36 30 37 34 46 42. 38 104 94 48 45 185 169 55 51 300 270 62 57 625 560 76 68 1130 1010 90 80 1840 1650 98 90 2750 2480 no 100 3900 8505 120 108 480 360 8 6.8 21 18 16 13.5 25 21 26 ' 22.1 30 24 40 34 33 27 82 70 39. 84 149 125 45 39 235 200 51 43 495 420 59 51 890 750 69 58 1450 1210 80 66 2170 1840 89 75 3100 2600 96 83 300 6.2 16.5 12 19 20 21 31 24 63 30 112 35 180 39 375 47 680 49 1100 59 1650 66 2350 73 240 5.4 14 10.8 17 17.8 19 28 21 56 25 100 80 160 35 335 42 600 47 980 52 1450 57 2090 63 180 4.6 13 9. 15 15 17 23.2 19 47 22 84 25 134 30 .280. 36 500 42 820 47 1210 51 1760 55 10 4 11 8 13 13.1 15 20.5 17 42 19 75 22 120 25 25a 32 450 37 740 42 1100 ' 45 1580 49 120 . 90 . .75 3.6 3 2.8 10 8.5 8 7' 6 12 10 5.4 9 11.8 13 9.9 . 11 9 10 18.1 15.3 13.9 14 12 11.5 ' : 37 32 28 17 . 14.5 13 66 56 19 . 17 50 15 105 90 22 19 81 17 200 188 170 27 22 20 395 335 305 33 26 650 550 490 36 30 27 980 820 740 40 35 30 1390 1180 1080 44 . 37. 34 60 2.4 4.7 7.9 12.1 10 25 : 44 71 15 150 270 420 650 26 950 For other temperature drops the pipe capacities may be changed correspondingly. For example, with temperature drop of 30 F, the capacities shown in this table are to be multiplied by 1.5. Table 3. Iron and Copper Elbow Equivalents* Fitting Tee, per cent flowing through branch: 100 " .. ~~ sn - 9S ______ --- .......... .- Iron Pipb 1.0 0.7 0.5 0.5 0.4 1.0 0.5 12.0 2.0 3.0 3.0 1.8 4.0 16.0 Copper Tubing 1.0 0.7 0.5 0.5 .0.4 1.0 0.7 17.0 3.0 4.0 4.0 1.2 4.0 . ... 20.0 The friction head in one 90 deg standard elbow is approximately equal to the friction of a length of straight pipe of the same nominal size and 35 diam long. Hence one elbow equivalent equals 25 p divided by 12 feet of straight pipe or tubing.. 307