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144 Am. Soc. of Heat.-Vent. Engineers Guide, 1922 Table 6. Capacities of Steam Distributing Mains, with a Total Friction of 1 Lb. for the Length of Run--Radiation in Square Feet--Unwin Formula---Nominal Sizes of Pipe Pipe Size, Inches 4 4'A 5 6 7 8 9 10 12 14 16 Length of Run in Feet 300 3,300 4,600 5,900 9,800 . 14,700 21,000 29,400 37,600 60,400 89,800 127,400 400 2,800 3,950 5,100 8,500 12,800 18,400 25,600 32,600 52,500 78,000 110,000 600 2.300 3,200 4,100 7,000 10,500 15,000 21,000 27,000 43,000 64,000 91,000 800 2,000 2,800 3,600 6,000 9,000 13,000 18,000 23,000 37,000 55,000 78,000 1,000 1,800 2,500 3,200 5,500 8,250 11,900 16,500 21,100 34,000 50,400 71,500 1,200 1,600 2,300 2,950 4,900 7,350 10,600 14,700 18,800 30,200 45,000 63,700 1,500 1/450 2,050 2,600 4,400 6,600 9,500 13,200 16,900 27,100 40,300 57,200 2,000 1,250 1,750 2,250 3,800 5,700 8,200 11,400 14,600 23,400 34,800 49,400 Calculated on the asumption that fittings, entrained water, etc., double the friction of straight pipe. Maximum condensation of radiating surface arid connected pipes taken at 0.3 lb. per sq. ft. per hour. Capacities of Supply Mains in Direct C. I. Radiation Pipe Size, Inches 2'A 3 3'A 4 4'A 5 6 7' 8 10 Length of Main in Feet--Pressure Drop 400 520 950 1,430 2,020 2,750' 3,770 6,r50 8,300 12,840 23,440 500 470 890 1,280 1,810 - 2,460 3,370 5,400 7,420 11,480 20,950 750 370 720 1,030 1,460 1,980 2,700 4,410 5,970 9,210 17,840 1,000 330 630 . 900 1,280 1,740 2,380 3,890 5,240 8,110 14,810 1,250 290 560 810 1,140 1,560 2,130 3,480 4,680 / 7,260 13,250 . 1,500 260 500 710 1,000 1,350 1,880 3,080 4,000 6,400 11,700 Note: Allowance must be made for ells and fittings in the line of flow. Sizes of Steam Mains for Direct Radiation 248 388 560 1,000 '1,550 2.230 3,040 4,000 5,012 6,200 8,940 ;12 ,167 15,900 1.89 17,490 2.25 ;20,137 1.58 22,150 1.87 24.800 1.43 27,280 1.7 35.800 1.14 39,380 1.36 48,700 .95 53,570 1.13 63,600 .80 69,960 .95 15.8 40 18.5 75m 22.6 29. 286 34.5 536 40. 890 43.4 1.360 49. 1,950 54.8 , 2,747 58. : 3,600 66. 5,900 74.3 9.040 ; 80. 12.700 '26,170 87.4 17,600 32,240 92. 22,900 46,540 103. 37,000 63,310 113. 55.300 82,680 123. 78.300 Am. Soc. of Heat.-Vent. Engineers Guide. 1922 g bs oo q,p*h X 1- PA | 130 F t. 120 F t O' tD CO *5 & 0. 04 cn. 4 o Z C/3 Id ?3 wz aS 06 2 no H2 Q Z o o 2 & fHc oD Id fiti . 9c(0n td 06 cu o z on CO i 50 F t. | 60 F t. bS doiQ *0 0 iOoOnM^ ONOQOO 'id bg data *o . a.pey Be. 'id bg O data *o o^odcee 100 F t. a.pH Id bg doja *0 O --OP5 --i O ISISIO * nn<QnMr.e Opi .63 ,43,830 900 1,395 2,007 2,736 n,Pa b Id bg s dojQ *0 9.72 6.8 5.06 4.3 28,640 .76 32,220 19,840 .95 22.320 16,109 1.06 18,123 12,720 1.26 14,310 9,733 , 1.46 10,950 7,152 ; 1.86 8,046 ! 4,960 i 2.43 5,580 I 4,009 2.69 4,510 3,200 3.37 3,600 448 16.2 604 310 23.5 350 198 32.4 '224 ! 800 1 1,240 i 1,784 : 2,432 80 Ft. `id *>s dona *0 CON cod N CO nMO .67 17.360 .637 14,095 9,640 .76 11,130 7,300 .887 8,616 5,364 1.12 6,256 3,720 1.37 4,340 3,007 1.63 3,608 2,400 2.04 2,800 1.824 2.6 2,128 1,338 3.06 :1 ,561 930 4 .1 1,085 600 5.86 700 336 9 .8 392 271 1 148 19.6 174 70 Ft. *td *bg dooa *0 232 14.21 Id bg dtua *0 `n.P*H *7d *bg dota 10 1 124! 194: 280 500 775 1,115 1,520 2,000 2,506 3,100 4,470 6.083 V do ooetSa v4iNnoda9docn o onvnmt' "nocoN1* OMonH ! 100 155 224! 400 620 892 1.216 1,600 2,005 2,480 40 Ft. id :bs data *0 Sdon aaoc8oMoo^o> 74 116 168! 300 465 669 a.pey Be. `id bs a *3 data | eSnoSS **0 ".pin 1 SE2S : W t>S 1 "** : <*<a 1 : *0 1 --:: 1 i id *bg 1 o doia 1 o 1 : : : is8 2-a .a I iSS. co^ 1 -9^* S X * .53 67.240 145