Document Lqjmm2qenOd299jJgv7LobjX

HEATINC VENTILATING AIR CONDITIONING GUIDE 1943 . Table 1. Heat-carying 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.) Milinch Fric- Nominal Pips Sizb, Inches Foot op Pipe 4A B 6A B 8A B 10 A B 12 A B H X 'A 1 m w 2 2H 0.75 1.35 2.85 5.4 11.3 17.0 33.0 53.1 1.5 1.7 2.1 2.4 2.9 3.2 3.8 . 4.3 0.9 1.7 3.6 6.75 14.0 21.2 4U 66.4 1.8 2.1 2.6 3.0 3.6 4.0 4.7 5.3 1.05 2.0 .4.2 7.9 16.4 24.8 48.4 ; 77.9 2.1 2.5 3.0 3.5 4.2 4.7 5.6 * 6.3 1.2 2.2 4.7 8.9 18.6 28.0 54.7 88.1 2.4 2.8 3.4 4.0 4.8 5.3 6.3 7.1 1.35 2.45 5.2 9.8 20.5 31.0 60.4 97.4 2.7 3.1 3.7 4.4 5.3 5.9 6.9 7.8 3 3J4 95 141 5.0 5.5 119 176 6Ji 6.9 140 207 7.3 8.0 158 234 8.2 94 175 259 9.1 10 4 5 6 8 10 12 197 363 596 1250 2320 3730 6.0 7.0 7.9 9.6 11 12 248 * 456 748 1570 2920 4690 7.5 8.8 10 12 14 16 291 535 879 1850 3440 5520 8.8 10 12 14 17 19 329 605 997 2100 3910 6270 9.9 12 13 16 19 27 364 671 1100 2320 4330 6950 11 13 15 18 21 24 14 16 20 25 30 35 40 . 50 A 1.45 2.65 5.65 10.7 .22.3 33.7 65J8 106 . 190 ' 282 397 731 1200 2530 4730 7590 B 2.9 . 3.4 4.1 4.8 5.7 6.4 7.6 8.5 9.9 11 12 14 16 20 23 26 A 1.55 2.85 6.05 11.5 24.0 36.3 70.8 114 205 303 428 787 1300 2730 5100 8190 B 3<1 3.6 4.4 6.1 6.2 6.9 8.1 9.7 11 12 13 15 17 21 25 28 A 1.75 3.25 6.85 13.0 27.1 41.0 80.0 ' 129 232 344 484 892 1470 3100 5790 9300 B 3.5 4.1 4.9 5.8 7.0 7.7 9.2 10 12 13 15 17 20 24 28 32 A 2.0 3.65 7.75 14.7 30.6 46.3 90.5 146 263 389 548 1010 1670 'ssio 6570 10560 B 4.0 4.6 5.6 6.5 7.9 8.8 10 12 14 15 17 19 22 27 32 36 A 2.2 4.0 8.55 16.2 33.8 512 100 162 290 430 607' 1120 1850 3900 7280 11710 B 4.4 5.1 6.1 ; 7.2 8.7 9.7 11 13 15 17 18 22 25 30 35 40 A ' 2.35 4.4 9.3 17.6 36.8 55.7 109 `176 316 469 661 1220 2010 4250 7940 12780 B .4.7 5.5 6.7 7.9 9.5 11 13 14 16 18 20 23 27 33 39 44 A 2.55 4.7 ` 10.0 18.9 39.6 59.9 117 189 341 505 712 1320 2170 4580 8570 13780 B 5.1 5.9 7.2 8.4 10 11 -13 15 18 20 . 22 25 . 29 35 42 47 A 2.85 5.3 1U 21.4 44.7 67.7 133 214 386 572 807 1490 2460 5190 9720 15650 B 5.7 6.7 8.1 9.5 12 13 . 15 17 20 - 22 24 29 33 40 47 54 60 70 80 100 150 200 300 400 500 600 800. A - 3.15 .5.85 12.4 23.6 r 49.4 74.9 147 B 6.3 : V.4 8.9 11 13 14 17 A B A. ,B 3.45 6.35 13.5 25.7 63.8 81.4 136.9 8.0 9.7 11 14 . 3.7 - 6.8 14.5 27.6 57.9 87.6 7.4 8.6 .. 10 12 16 17 160 18 172 20 A 4.15 7.7 16.4 31.1 65.4 99.0 194 B 8.3 9.7 12 14 iv 19 22 A 5.2 9.6 '20.4 38.8 81.6 124 243 B 10 12 15 17 21 23 28 A 6.05 11.2 23.9 45.4 . 95.5 145 285 B 12 14 17 20 25 27 33 A 7.5 13.9 29.7 56.6 119 181 356 B 15 18 21 25 31 \ 34 . 41 A 8.75 16.2 34.7 66.2 140 212 417 B 18 21 26 30 36 40 48 A 9.85 18.3 39.2 74.8 158 239 471 B 20 23 . 29 33 '.41 45 54 A B 10.9 20.2 43.2 82.5 174 264 - 521 22 26 32 37 -.45 50 60 -A. .B 12.7 23.6 50.5 96.5 204 310 610 25 30 37 43 52 59 ... V0 238 427 633 893 1650 2730 5760 10780 17360 19 '22 . 25 - 27 32 36 44 52 60 258 465 690 973 1800 2970 6280 11760 18950 21 24 27 29 . 35 40 48 57 65 278 500 .743 1050 1940 3200 6770 12690 20440 .22 26 29 32 37 43 52 62 70- 314 566 840 1190 2200 3630 7680 14400 23200 25 30 , 33 36 42 48 59 70 80 3&3 709 1050 1490 2760 4560 9650 18120 29220 32 37 41 45 53 61 74 88 101 461 832 1240 1750 3240 5360 11350 21320 34400 37 43 48 53 62 71 87 104 118 577 1040 1550 2190 4060 6730 14270 26830 43300 46 ; 54 60 66 78 90 110 131 149 676 1220 1820 2570 4780 7910 16790 31580 51000 54 64 71 78 92 105 129 154 175 765 1380 2060 2910 5410 8970 19040 35840 57880 62 72 80 88 104 119 147 174 199 846 1530 2280 3220 5990 9930 21100 39740 64210 68 . 80 89 97 115 ..132 162 193 : 221 992 1790 2670 3780 7030 11670 24820 46780 75620 80 94 104 114 135 155 191 228 260 aFor 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. 316 CHAPTER 16. HOT WATER HEATING SYSTEMS AND PIPINC Table 2. Heat-carrying Capacity of Type L Copper Tubing with Temperature Drop of 20 Fa Nominal Tube Sizes % 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.) Size, In. x ---------------- X H H 1 iH m `2 m 3 3M l A B A B A B A B A B A B A B A B A B A B A B A B Milinch Friction Loss per Foot op Tcbr 720 600 10 9 27 24 20 18 35 30 36 ' 30 37 34 51 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 3505 120 108 480 8 21 16 25 26 30 40 33 82 39 149 45 235 51 495 ' 59 890 69 1450 80 217089 3100 96 360 300 240 180 6.8 ` 6.2 5.4 4.6 18 16.5 14 13 13.5 12 10.8 21 19 17 9 15 22.1 20 17.8 15 24 21 19 17 34 31 28 23.2 27 24 21 19 70 63 56 47 34 30 25 22 125 112 39 35 100 30 84 25 200 180 160 134 43 39 35 30 420 375 335 280 '51 47 42 36 750 680 600 500 58 49 47 42 1210 66 1100 59. 980 . 820 52 47 1840 1650 75 .. 66 1450 57 1210 51 2600 83 2350 2090 73 63 1760 55 150 120 90 '4 3.6 3 11 10 8.5 8 7' . 6 13 12 10 13.1 11.8 15 .13 9.9 11 20.5 18.1 15.3 17 14 12 42 37 32 19 17 14.5 75 66 56 22 19 17 120 105 25 22 90 19 250 200 188 32 27 22 450 395 335 37 33 26 740 650 550 42 36 30 1100 . 980 45 40 820 35 1580 ' 1390 1180 49 44 . 37 75 - 60 2.8 2.4 8 .7 5.4 4.7 98 9 7.9 10 . 9 13.9 12.1 11J5 10 28 25 13 12 50 44 15 13 81 71 17 15 170 150 20 18 305 270 23 21 490 420 27 23 740 650 30 26 1080 34 950 29 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 Equivalents3 Fitting ' Iron Pipe Copper Tubing Elbow, 90-deg................................................;..i'.................... Elbow, 45-deg..................... :......_.......................................... Elbow, welded, 90-deg......................................................... Reducing coupling. 1............................................................ Open return band................. -.............................................. Open globe valve. ..................................................;....... Angle radiator valve.-- .................................................... .-. Radiator or convector......................................................... Boiler or heater. ............. ..................................................... Tee, per cent flowing through branch: 100.. ...........................................................................:.. 50. _ .............................................................................. 25__ ...............................;.V...:....................... :............. 1.0 0.7 0.5 0.5 0.4 1.0 . 0.5 12.0 2.0 3.0 3.0 i 1.8 4.0 16.0 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 aThe 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 25 diam long. Hence one elbow equivalent equals 25 D divided by 12 feet of straight pipe or tubing. 317