Document 4LVZ78KBMRLJ8Ek66wX9yw4p

T a b l e 38. C a p a c it y of Pip e in Sq u a r e F e e t of D ir e c t R a d ia t io n for O ne a n d w o-P ip e St e a m Sy s te m s, W h e n P ressureT D rop is not Over 1 oz. per 100 f t . of E q u iv a le n t L en g th of R u n . American Society of Heating and Ventilating Engineers Guide, 1920-27 ______________________ Sq.' Ft. of Radiation ____________________________Gage ______________ ______________________________________Capacity i n Drips to Returns Steam Risers . 0. - O filss $*=> {ass *a ' 3 Jl Q OLO ' --H PO. QOOO ^ OO > <N g, o jS a'gi ^ Cm J <-l Cm c3' S > 0^00.2CO . 43> X Q & 5 IS gs ,,BsrS.s. Q 1 " 8 e'S- SfiO-Sii Z II ESU 45sS f?B IS 82 *2 |l|o O o J' -Z. 25 < o SC O 30 " B PQ pCm -u- y,2eJ .5 208 *&! Hii- iCsQS 3C/KQ1 J> *0. 2*<zSa|g< sl>|, faSa"l" A|ftaSMJ2 i2gB 0Q S3 ^dS w,, 151 OOQQOQC CHO^aN>OoOoQoO>Cc 8OO 8oo8O8O8O5< :? f'O'OCoMOo-mCoCNN Drips to Returns C'J rr> Tf< & w'vmX S eo\M\rt\ S e.2oJ '^ 1-< "<- C* SO0 `O*NO''OO'HOOnHOrOOQTOf'OOO f^N0'2>00OOi'O "tO'^HOCOOfOiDOO>O^fONi cn M rn CO B* Tf pvlopioo^imoUDro'oOi 6o ** c 01 D,p ^'a =5* Steam Pressure 1 lb. ______________________I n i t i a l 64 American Society of Heating and Ventilating Engineers Guide, 1926-27 Table 39. Capacity of Pipe in Square Feet of Direct Radiation and Pressure 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.J'eh Sec. 25 Ft. 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.* A3 " 25 1.0 l" 40 0.8 mn 63 0.4 wl 90 0.4 2" 150 0.2 tw 220 0.18 r 340 0.17 iW 440 0.16 4" 650 0.15 35 2.4 45 3.9 55 6.0 65 60 2.0 70 2.7 85 3.8 102 90 0.8 115 1.2 145 2.4 172 120 0.6 152 0.9 195 1.6 235 210 0.3 260 . 0.7 325 1.3 400 300 0.3 370 0.5 460 0.7 560 490 0.25 590 0.4 750. 0.7 900 630 0.2 780 0.3 960 0.4 1150 800 0.19 1000 0.2 1260 0.3 1500 8.0 90 16.0 5.6 138 10.0 3.2 235 5.8 2.5 312 4.2 1.7 530 3.0 1.2 750 2.7 0.9 1210 1.8 0.6 1550 i:5 0.5 2000 1.0 *P. D. *= Pressure drop in ounces. Table 40. Capacities of Wet Return Mains in Square Feet For Vacuum Systems Size of Pipe 1# 1)4' 1)4' 2* 2)4' 3' 3M' 'Length 300' 600 1,200 3,000 8,200 15,000 28,500 40,000 " 800' 375 750 1,875 5,200 9,700 17,000 25,000 " 1,000' 700 1,700 4,680 8,700 15,100 23,600 " 1,500' 610 1,420 3,850 7,150 12,300 18,900 " 2,500' 1,125 3,000 5,600 9,425 15,000 Length equals measured distance from vacuum pump to end of riser. Table 41. Capacities of Return Risers in Square Feet for Vacuum Systems Size of Pipe K' 1'-/ IK' "Length 100' " 200' " 400' " 600' " 1,000' " 2,000' 925 1,850 3,910 700 1,400 3,150 560 1,120 2,480 420 840 1,750 350 700 1,470 230 460 1,050 Length equals measured distance from boiler or pressure reducing valve to end of riser. Capacities as given in Tables 40 and 41, include allowances for elbows, tees, etc. Table 42. Radiator Connections for Vacuum Systems Supply Return Capacity in Sq. Ft. Radiation Size of Inlet Valve Vertical Pipe to Inlet Valve Horizontal Runout to Vertical Inlet Pipe Size Trap Horizontal Stub to Trap Runout to Stub 1 to 60 61 to 100 101 to 200 201 to 350 w i" wi %" 1 \i*ys m* i" IK" 134" 2" 34" 34" 34" 34" 34" K' K" K" K" K" ' K" Radiators to be water pattern tapped or bushed top and bottom opposite ends. Steam pattern radiators can be used when tapped or bushed eccentric opposite ends with supply bushing turned up and return bushing turned down. 65