Document 4mqpdznKXnZNjKQQgoN5nYkp

T able 38. Capacity of Pip e in Square F eet of D irect R a d ia tio n for V arious Parts of V arious Systems, W hen Pressure D rop is not Over 1 oz. per 100 ft. of E q u iv a le n t L ength of R u n . In itia l Steam Pressure 1 lb. Gage.__________________________________ ___________Capacity in Sq. Ft. of Radiation American Society of Heating and Ventilating Engineers Guide, 1925-26 T wo-Pipe Steam Radiator Valves Not Exceeding 400 ft. in Length. Graded no leas Supply Returns than 1 in. in 30 ft. fcsgS 05 2 < 2 . Sj P K Q gs & MpOA a5*H liP gili Sis6 igAoo 2 2B n ^fe JrS2n--sog'' a3li0~g--0* Q fc-c Z5WSC3d 2Wo d. _ 2 - o Eco . 0s5lE 8 5" - OQ pzog _ s < < 60 5Q a 0 IMS JBIE- a MB ssss1 g<So ao 1 in. Pitch per 10 ft. 16 ft. per Sec. Vel. } in. Pitch{ per VOft. 12 ft. per Sec. Vel. 180 420 900 1,500 3.000 4,900 9.000 13,000 18,500 D rips for Risers Drips to Returns Wet 00 -O CM.......................................... CO..................... 38888 ' : * oola8 --cO'OOoO'Or'--> --I CM CO ':8888'-` -t CM 8888 : : : * iHCNf) ' 1 s 35 cofi xx . CM CO CO tP >. ^____ i5 ae 3j 60 . :88S8888 : MN^Ttoeo 8,966 12,504 22,555 36,396 43 97 149 309 508 930 1,389 1,926 2,670 3,636 5,800 l CM CM t*5 CO rP lO 'O t-OOON , Drips to Returns Wet 64 H o lt,-- Up-feed tw o-pipe supply risers m ay be sized same as supply m ains and down-feed risers up to velocities of from 50 ft. to 100 ft. per second corresponding to pipe sizes fro m 1 in. to 4 in. American Society of Heating and Ventilating Engineers Guide, 1925-26 Table 39 Capacity of Pipe in Square Feet of Direct Radiation and Pressure 1A Drops in Ounces per 100 ft. of Equivalent Length of Pipe for Various Velocities of Steam Initial Steam Pressure 1 Lb. Gage. Size 12 Ft per Sec. 16 Ft. per Sec. 20 Ft. per Sec. 25 Fr. per Sec. 30 Ft. per Sec. 40 Ft. per Sec. Pipe Sq. Ft P. D.* Sq. Ft P. D.* Sq. Ft P. D.* Sq. Ft P. D.* Sq. Ft P. D.' Sq. Ft P. D.* k* 25 r 40 iK" 63 i w 90 2* 150 ?M" 220 3' 340 3H*. ,440 4' 650 1.0 0.8 0.4 0.4 0.2 0.18 0.17 0.16 0.15 35 2.4 60j 2.0 90 0.8 120 0.6 210 0.3 300 0.3 490 0.25 630 0.2 800 0.19 45 70 115 152 260 370 590 780 1000 3.9 2.7 1.2 0.9 0.7 0.5 0.4 0.3 0.2 55 85 145 195 325 460 750 960 1260 6.0 65 3.8 102 2.4 172 1.6 235 1.3 400 0.7 560 0.7 900 0.4 1150 0.3 1500 8.0 90 5.6 138 3.2 235 2.5 312 1.7 530 1.2 750 0.9 1210 0.6 1550 0.5 2000 16.0 10.0 5.8 4.2 3.0 27 1.8 1.5 1.0 *P. D. * Pressure drop in ounces. Table 40. Capacities of Return Mains in Square Feet Size of Pipe 1# IK' IK' 2' 3* 3H". `Length 300' " 800' " 1,750' " 2,500' 600 375 1,200 750 600 3,000 1,875 1,300 1,125 8,200 5,200 3,750 3,000 15,000 9.700 6.700 5,600 28,500 17.000 12.000 9,425 40.000 25.000 18.000 15,000 Length equals measured distance from vacuum pump to end of riser. Table 41. Capacities of Return Risers in Square Feet Size of Pipe K' *' IK' "Length 200' 700 1,400 3,150 " 400' 560 1,120 2,480 " 600' 420 840 1,750 " 1,000' 350 700 1,470 " 2,000' 230 460 1,050 as given in laoies 4U a Capacity in Sq. Ft. Radiation 1 to 60 . 61 to 100 101 to 200 ?01 to 350 Table 42. Radiator Connections Size of Inlet Valve Vt." i" IK" i nr Supply Vertical Pipe to Inlet Valve Horizontal Runout to Vertical Inlet Pipe Vi V IK' iK' i' IK" IK' 2" Return Size Trap Horizontal Stub to Trap Runout to Stub K" w K" K" M" Vi Ye Vi" Vi" Vi' Vi' Vi" taPDed f bUSh'd eccentric opposite ends "ith siPR'y Lushing 65