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. <br /> � OSTP Pressure Distribution fi;,�a, � <br /> �� , UNIVERSITY �.� ��� '.�' .. <br /> Minnesota Pollution Des�gn Worksheet OF MINNESOTA ;.o � � <br /> Control A enc - ,.�+,�,��- <br /> Project ID: v 11.09.22 <br /> 1. Setect Number of Perforated l.aterals fn system/zone: � _____ <br /> (2 feet is mfntmum and 3 feet is mmaxximum spocing) """"'."'"""'"" <br /> �� . 'r { � <br /> iz� ... . >iz�s u � � <br /> 2. Select Perforation Spacing: 3 0 ft _.. , , _ - <br /> _, <br /> �.� �- <br /> �� Minimum <br /> 't.'pertwafiom si�accd 3'rpart �"-2"ot rock .:�12' <br /> 3. Select Perforation Diometer Size 7/32 in _ _ <br /> 6'ol rxk . . . . <br /> 4. Length of Laterats =Media Bed Length-2 Feet. ���a���,•�=��K,:�,•-=o'/•" Pcrfwalion sWcinq:Z'to 3' <br /> 63 - 2ft = 61 k Perforation cun not be doser then 1 foot from edge. <br /> 5• Determir�the Number of Perforation Spoces. Divide the Length of Lvterals (Line 4)by the Perforvtion Spacir�g (Line 2)and <br /> r�nd down to the nearest whote number. <br /> Number of Perforation Spaces = 61 ft = ��ft = 20 Spaces <br /> 6. Number of Perforations per l.ateral is equal to 1.0 ptus the Number of Perforotion Spaces (Line 5). <br /> Perforat3ons Per l.atera! = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> Check tobte betow to verijy the number of perforQtions per lotera(quarantees less thon o 10%discharge vorladon. The vnlue�s <br /> double if the a center�nifold is used. <br /> Maximum N�nnber�Pe�farations Pe+r i.�erat tQ Guarantee<10%Oischacge Variakian <br /> !,} P arabans 7/32 inch Perfaratiorts <br /> P�rfarati�Spacing�Feet} �Pe Qia�rieter(Inchesl Perforatian S�acin8 Pi�e Qiameker(inches) <br /> f 1S� tth 2 3 (Feet� t 1S� 1�: 2 3 <br /> Z : 10 13 18 30 60 2 11 16 21 34 68 <br /> 2�t 8 12 ib 28 54 21h 10 14 20 32 64 <br /> 3 8 12 ib 25 52 3 9 !4 t9 30 bE1 <br /> 311 d trxh PefFaratia�s 118 Inch Perforations <br /> PerfQrat�an Pipe Diameter 11cu}�es► Perfaration Spacir�g Pipe D�ameter(lnchesl <br /> ���lF�� 1 1� 1i� 2 3 (Feet) i fYs tYt 2 3 <br /> 3 12 18 26 4l► $1 2 21 33 4# 74 t49 <br /> � 12 17 24 40 80 2Yt 20 30 41 69 135 <br /> � 12 16 22 37 75 3 20 14 38 N 128 <br /> 7• Toto!Number of Perforottons equals the Number of Perforatforu per Laterol (L9ne 6)multiplied by the Number of <br /> Perforated Luterals (Line 1). <br /> 21 Perf.Per Lateral X �Number of Perf. Laterats = 63 Total Number of Perf. <br /> 8. Calculate the S�are Feet per PerforaHon. Recommended vvlue�s 4-10 ft Z per perforatlon. �'°�"°"°�►«w'"► <br /> Does not apply to At-Grades ��,�� °"`°""°"D1�'"°" <br /> ,,� ,,� �,�� ,,� <br /> Bed Area = Bed Width(ft)X Bed Lerx�th(ft) �.w o.�s o.4+ o.ss o.�s <br /> 10 ft x 63 ft = 630 ft� +.: o.� o.s, o.�q o.9 <br /> 20� 0.26 0.59 .D.lO� �� ��4_01 <br /> LS 0.19 0.64 O.B9 1./J <br /> . 7.0 032 OJ2 D.f6 f.2t <br /> Scpiare Foot per Perforotion =Bed Aren divided by the Tota(Number of Perforotions (Line 7). ••o 0.3� o.a ,.,3 ,..� <br /> S.O 0.11 O.!] 1.76 t.K <br /> 630 ftz = 63 perforations = 10.0 ftZ/perforations „�� ����[t13/16fnChtOtJ15KA <br /> Ov+elting with 1/C inch pMwatbnc <br /> [r I(eet O[Ixr eytadishments andµ5T5 wlth 3/16 <br /> 9. Setect Minimum Average Heod: 1.0 �l inch to t/a�nch perforatiors <br /> S iKt Oth[f 6tLMWITMtS iM NSTS WItA 178 G1[A <br /> p!f/Ofdt�DlK <br /> 10. Select Perforntion Dfscharge (GPM)based on Table 111: 0.56 GPM per Perforation <br /> 11• Determine required Flow Kate by multiplying the i'otal Number of Perforations (Line 7)by the Perforation Dischorge (Line 10). <br />