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PRESSURE DISTRIBUTION SYSTEM <br /> All boxed recfangles must be entered,the rest will be cak:ulated. <br /> 1. Seled number of perforated laterals: 03 ��u..-�:�<<-h�� <br /> 2. Select perforation spacing= 03 ft L��"��Q~'� T s <br /> ��r..,.•k <br /> i4:i�.`•..��nK i�s_s�ia^ --- <br /> 3. Since perforations should not be placed doser that 1 foot to <br /> the edge of the rock layer(see diagram),subtrad 2 feet from <br /> the rodc layer len th <br /> 62 -2ft= 60 ft <br /> 4 Detertnine the number of spaces between perForations. <br /> Divide the length(3)by perforation spaang(2)and round down to nearest whole number. <br /> Perforation spaang= 60 ft/ 3 ft= 20 <br /> 5. Number of perforations is equal to one plus the number of perforation spaces(4). <br /> •Check figure E-4 to assure the number of perforetions per latera/guarantees <br /> <10%disd►aige variation. ' <br /> 2p spaces+1 = 21 peiforations/lateral <br /> E�Maxfmum Number of 7/4 inch perforatlons E-6 PerForatlon Dfscha e in GPM � <br /> lateral to uara�es<10X dlscha variation Head Perforations diameter <br /> p��� feet inc�es <br /> �p�y 3/16 7/32 1/4 <br /> Teet 1 inch 1.25 inch 1.5 inch 2.0 inch 1' 0.42 0.56 0.74 <br /> 2.5 8 14 18 28 2b 0.59 0.80 1.04 <br /> 3.0 8 13 17 26 5 0.94 1.26 1.65 <br /> 3.3 7 12 16 25 a. Uae�.o foot for ainpl�tamiy homes. <br /> 4.0 7 11 15 23 b.use 2.o reee�cr ' eiae <br /> 5.0 6 10 14 22 <br /> 6. A Total number of perforations=perforations per lateral(5)times number of laterals(1). <br /> 21 perfs/lat x 3 laterals= 63 perForations <br /> B.Cak�late the square footage per pertoration. <br /> Reoommended value is 6-10 sqft/perf.Does not apply to at-grades. <br /> 1. Rodc bed area=rock width(ft)x rock length(ft) <br /> 10 ft x 62 ft= 620 ft� <br /> 2. Square foot per perforation=Rodc Bed Area/number of perfs(6) <br /> 620.0 ft� / 63 perfs = 9.8 ft�/perf <br /> 7. Detertnine required flow rate by multiplying the total number <br /> of perforations(GA)by flanr per perforations see figure E�) <br /> 63 perfs x 0.74 gpm/perfs= 46.6 gpm � __- - ___--- ; <br /> _ �,.,t,� <br /> 8. If laterals are connected to header pipe as shown - =��� �r� <br /> in Figure E-1,to select minimum required lateral �°� __ z`. <br /> diameter,enter figure E-4 with perforation spaang(2)and � ` " ` •_�. <br /> =- >�,,.,...�.,M. <br /> ��. <br /> ,_ �. . ,..,�,.� , <br /> number of perforations per lateral(5). �.E-�:M����d�w«�,..»^� ; <br /> Select minimum diameter for perforated laterals= 2.0 inches <br /> 9. If perforated lateral system is attached to manifold pipe ��-�,a;� "' ' <br /> near the center, like Figure E-2,perforated lateral length(3) .�- - - `' <br /> and number of perForations per lateral(5)will be approximately �t " - - <br /> one half of that in step 8. Using these values,seled • � ,,_. � ';�_ > - <br /> minimum diameter for perforated lateral= 1.5 inches. �--- �r�� <br /> I hereby certify that I have c�mpleted this wo�1c in accorcJance with all applicable ordinances,rules and laws. <br /> (signature) 810 (license#) p�f (date) <br /> Page 1 of 1 <br />