Document L6XOb5D3V9wbgEQJ0xwXq5nb

V22 CHAPTER 8 1962 Guide And Data BooV particular section of pipe may vary considerably from the average loss for the system due to the limitations of com mercial pipe sizes. For example, if the average friction loss ia 2.0 ft of water per 100 ft of pipe (240 milinches per ft), the actual friction las in particular sections of pipe may vary from 1.0 to 3.0 ft per-100 ft (120 to 360 milinches per ft). One method of nring pipe is based on preliminary selec tion of a pump. The bead which the pump can produce is divided by the equivalent length of the longest circuit to obtain an average design friction loss. The equivalent length of a system or circuit is the length of pipe in series flow in the circuit, phis the length of pjpg equivalent in resistance to the fittings and also the equip, merit in series flow in the circuit. For preliminary calculi, tion the equivalent length is sometimes assumed to be times the measured length. Table 1 can be used for pipe sizing by this method. It provides the designer with a means for quickly relative effects, economic and otherwise, of various pumps oq the system in terms of pipe size. After sizing the piping on the bad* of a preliminary design friction loss the actual friction loss at design rate of flov FLOW OF VWTER fN GALLONS PER MINUTE Lower teal* of chart is based on 20-deg temperature difference bofw--n flow and return risers. To And friction when feoiparatiw* drop is oter tea 20 deg, multiply the octet b*of coaroycf by (20-i-actef trap, drop) and read the eotretpoodmg friction. Comrsoa Ft/flOOFt) to M&sehet/ft Ft per 200 ft 0.5 ! 2- 3 4 5 Mfflnehes per ft 60 120 240 360 480 600 Fig. 5.... Friction Loss doe to Flow of Water in Iron Pipe 6000 4000 3000 2400 2000 1760 2000 1716 ,1430 1260 1140 1030 1500 1250 u o o [1000 jlllO 1200 ,1000 1060 Hot Water .Heating Systems to 8 1 co 1 5 I to d i d 1 CO o to S w oN g is d w 1 1 d to i d to 8 CO c~ d d cO CO 8 2 d t-- 2 d 8 CO oJdJ ao o T 8 00 tow oCOo 3 CO 8 to 'I ei n s toXCO S 2 w 2 00 dd to CO -S3 ci S d S 00 d w CO S 2 n d prlt n CO d s 03 d 3 T 00 2 <V 3 - d 0* R 0 CO 00 2 03 2 CO q0 2 CO to 00 o d CO o> - w so CO s: 2 ss 00 CO 50 >o 00 Sr 03 ddddd o StnSajjSgaJSco 2 03 a-a.fc.&.a.&,a.CL, &, cu Ofa.Ots.OU.Ofc, O 88g1 3 *1 X X i i S HOoj 1200 c iiig s i- s <0 oc i d 0 1 S to 3 i 1gl 1330 1200 1000 2000. 260oj [12200i 1 1200 1120 1040 1470 1330 1200 1070 1000 2200 2000 1800 1600 1500 1400 1300 1200 c 5 =: 6 to CO 22 s 2400 11 6OG 1 1I l 1i .8 1 g i1 i to < 1 2400 2130 2000; 1870 1730 3000 V 1 1 ao 1 4400 4000 8I 0 ct s i | i 0009 8 123 toi ft 1 00 1 | to 1 o dd 03 1 to 03 i d g i d o g co d d 5 d lO 03 1 c $ d o CO t- d T: CO i ao o CO 1 8 to8 <o 8 9 ao d d O d o 00 d - o to ao too o d ttoo d s to 3 & d o to 5 d to 00 o to s CO 3 d r> w 00 cO to co to 2 d CTOO CO eOoO CO "? rs CO 2 pi d d oo d 2 to CO c to d = d - d CO d 2 50 00 o O) o 03 to CO eo >o CO d 2 oo - at d CO ! 3 -- r K3 to CD Pt 1 8 1 ddd 1 1 2 CN d 8 i S d 8 5 o> d s ; d 3 i 8 a0 d i d o 00 1 o 1 d o So O 03 3 S to w 2 j ao CO s d d i 2 o s u n. o2 SO 8 8 U dddd o d s to d tCoO oo d - co 00 o s 8dods oo to d C0O3 d o s d 3 > d o op d 00 d g d S CO eS d 2 d 3 to d to d CO d CO to d 00 to o to d o d d O 2 rs d CO ao CO CO W3 c- ao 2 ao a d 4800 5000 6600 1 o 1 o 1 ac oo 1i g CO c~ | e dd 8 d 82 i o d 1 co d o & to d 1 d S d s 03 g d d 8 M 2 CO 00* pt 00 d d CP a 2 u Q 2 o d d a td r~ 3 03 d 8 >o s c-- d 00 co d s w s d ao 03 o ? d r- *r o 2 d d CO CO d o ao d o> o o co d cO d ao co o d CO to t> dd 2SO O d 2 CO o dd Z a. 03 a. Z a. CQ &, Z a. 03 a, Z a. at e- Z a. co a. O fa. O fa. O fa- O fa. O fa. fOfaSaEiSosj a-o-fa.a.cua.&.a.P Ofc.Ofc.Ofc.Ofc.C S a. 03 cu S a. oo a. S a. m a. 2 a. a. O fa. O fa. O fa, O fa. 0 0 3 0 I 0 0 8CO 8 S 1 0 3 I 0 to i PC Xp* X d0 CO S N 2 CO 8 i2 8 1 PS 3 3 | s 8CO 8 to s S0* s i 8 to 1 tO 8w 3 I 1 0w 8 i i s cw s0 tto 2 CO w 1 8 . i 3 1SI1 LO 03 i -- i s 1gi I 11s i CO X CO *CO 3W8 S1s to3ct M 2 N 8 09 3 3CO co 8pt IsI 1IIS di 8 CO 3 8CO 1 1 p w 3 8CO 88 1 i 3 1 1 So S S 2w g ' 8 . i S tes f i 0 to 2 ! g 2 Nao i g ' tO i 5? to ao 2 2 2g8g toto s 3 Q 3 s sp* S 8 g s 0 et p a50 S833 S' i S 1 8eo 3 i 8p> stcSo 2 8CO to 0 eo .3 3 CO to co I to ? 8 to . to cCwoO 0 3 1ii1 I 1 1 8to 8 813i 1000 M*y b u u a lor preliminary tilin g f Typo L upper tub*.