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OSTP Pressure Distribution <br /> UNIVERSITY <br /> Minnesota Pollution DesiQ 11 WOf�(Sf1E'Ct �; -- <br /> Control A enc S OF MINNESOTA ,.-,�,,`�� <br /> ProjectlD: v 11.09.22 <br /> 1. Select Number of Perforated Laterals in rystem/zone: �� - ----_ <br /> (2 feet is minimum and 3 feet is moximum spacing) """`"'"""" L"` \` <br /> �� " -- r - <br /> 2. Select Perforation Spacing: ft "`� " ` ` ��<�,�,.: .- <br /> <...� ..,,�,. <br /> M�n�n�um ' •a--_`__� <br /> 'I:"piytor:�[�ion•.sp.��.rd i'.�f�.�rt t'-Z"of rork t1.. <br /> 3. Select Perforation Diameter Size �n _ _ <br /> (. nf�n�k <br /> 4. Length oj LaterQls =Media Bed Length -2 Feet. �^�+�..����,��_ , � � ���<<��.,���,�;,�:,����,:7 «,:; <br /> � - 2ft = ��ft Perforation can not be doser then 1 foot from edge. <br /> 5• Determine the Number of Perforation Spaces. Divide the Length of Laterals (Line 4)by the Perforation Spacing (Line 2)and <br /> round down to the nearest whole number. <br /> Number of Perforation Spoces = ��ft .- ��ft = �Spaces <br /> 6. Number of Perforations per Latera( is equal to 1.0 ptus the Number of Perforation Spoces (Line 5). <br /> Perforations Per Lateral = �Spaces + 1 = �Perfs. Per Lateral <br /> Check tab(e below to verify the number of perforotions per lateral guarantees less than Q f0%discharge variation. The value is <br /> doub(e if the a center manifo(d is used. <br /> Maximum Number of F'e�o�a:io�s Pe.*later�f to Guarantee<10�Discharge YariaLia� <br /> _Inc�Fe�t�xatic,�s 7,'32 Inc�P?rfe�ratio�s <br /> F��forat�n Spacng fFeet) <br /> f�pe Diaar►�.er�Inct�,i Pe�toration Spacing Pip?D:ameter(Inches) <br /> t 1�: 1tZ 2 3 f.Feeti t 11: 1�� 2 3 <br /> � 90 13 !8 30 6C� 2 11 16 2i 34 68 <br /> �?�- E 12 1b 2� 54 2�� tt� 14 2t� 32 �1 <br /> � R 12 16 25 52 3 9 14 19 30 60 <br /> 3'16 lnch Perforations i;`8 Inch Ferfarahons <br /> Pipe Diam�ter(Inches) Perforation Spacing Pipe Diast:eter�Irachr) <br /> Fe�orat�on S�cmR IFe�t) <br /> f 9t: �X; z ; (Feetl t t�� ti. 2 3 <br /> 2 12 18 25 4b 87 2 21 33 44 74 149 <br /> 2�'� 12 17 24 4fJ EO 2� 20 30 41 69 13` <br /> 3 12 9b 22 31 7� � t� 29 38 64 12� <br /> �• Tota(Number of Perforotions equals the Number of Perforotions per Latera! (Line 6)multiplied by the Number of <br /> Perforated Laternls (Line 1). <br /> �Perf. Per Lateral X �Number of Perf. Laterals = �Totat Number of Perf. <br /> _ __ _ __ <br /> 8. Calculate the Square Feet per Perforation. Recommended volue is 4-10 ft z per perforotion. "�'��"onDtx^���6PM> <br /> PcrtoraHon Diametcr <br /> Does not apply to At-Grodes Me�d,r�, _ <br /> ,,a ,,, , ,, <br /> BedArea = Bed Width (ft)X Bed Length(ft) ,.o• o.is o.�, o.sb o.�4 <br /> 1.5 0.72 0.51 0.69 0.9 <br /> �ft X �� ft = �ft2 :.o° o.zs o.ss o.eo �.oa <br /> 2.5 0.29 0.65 0.89 1./7 <br /> 3.0 D.32 0.72 0.98 i.28 <br /> Square Foot per Perforation =Bed Area divided by the Tota(Number of Perforations (Line 7). •.o o.» o.e3 ,.,s ,..� <br /> 5.0` O.at 0.93 1.26 1.65 <br /> 2 Dwelli�:with 3l76 in[A Io t/i inCh <br /> ft � � perforations - �ftz/perforations t fooc pertora[iom <br /> Dwellimy vrich 1/8 inch peAoratb� <br /> Z�eet Ocher establishment;and;.t5T5 vri[h 3/f6 <br /> 9. Select Minimum Average Head: ft inch to 7/4 inch peAoratiora <br /> 5 ftt[ aher geabtishments and?:5T5 with t/8 i�h <br /> p�no�a��o�s <br /> 10. Select Perforation Discharge (GPM)based on Table III: GPM per Perforation <br /> 11• Determine required Flow Rote by multiplying the Tota!Number of Perforations (Line 7)by the Perforation Discharge (Line 10). <br />