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' E-26 <br /> , , PRESSURE DISTRIBUI70N SYSTEM . � <br /> 1. Select number of perforated laterals ' , _ � - <br /> ,, <br /> 2. Select perforation spacing =�_ft. � <br /> 3. Since perforations should not be placed closer than 1 ft. to <br /> the edge of the rock layer (see p. E-14),subtract 2 ft. from the <br /> rock layer length. <br /> Li � -2 ft. _��,ft. � <br /> Rock laya la+gth <br /> 4. Determine the number of spaces between perforations. <br /> Divide the length above by perforation spacing and round E-17a <br /> down to nearest whole number. <br /> O F I A 1NGI'M <br /> Hnd Perforation diameter(inches) � <br /> Length perf. spacing =�ft.+ 3 ft. __I�spaces �i32 �i4 ` <br /> . (3) (2) i.a o.sb o.�a <br /> 1S 0.69 0.90 <br /> 5. Number of perforations is equal to one plus the number of Z°b o.s° l.oa <br /> 2.5 0.89 1.17 ► <br /> perforarion spaces . 3.0 0.98 128 � <br /> 4.0 1.I3 1.47 <br /> 5.Q 1 Z6 1.65 <br /> � �spaces +1 = �� perforations/lateral aUx lA foot oI hesd for residenbal systems. <br /> bUse 2A feet of hnd fot othc establishmmts <br /> 6. Multiply perforadons per lateral by number of laterals to <br /> get total number of perforations. E-17b `�'���� <br /> � � M�Jwii�rltrr's!}d�e�1�Y�1� <br /> x � - �IS rforations. •...•-<�°`°'.�.„.'..• <br /> laeeral s peri:/Lusa!— � � 1.?S inch 1 S inch 2.0 inch <br /> 2s ia is Zs <br /> 7. Detezmine required flow rate by multiplying 3A �3 i� 26 <br /> number of perforations by flow per perforation a o ii is i3 �` <br /> (see page E-1� s.o io �a 2z <br /> � X 0,7�I =3�3 gpm. ` <br /> � ��� E-15 <br /> � ....,�Q a..�.��,�...�. <br /> � <br /> 8. If laterals are connected to header pipe as shown on page E- � <br /> 15,select minimum required lateral diazneter from table on . �. <br /> page E-17;enter table with perforation spacing and number ,,.�°' �-� <br /> of perforations per lateral. Select minimum diazneter for ., ', �'� <br /> perforated lateral= 1.5 inches. . <br /> �� E-12 <br /> .. <br /> r-.s.�:rr:- ,. <br /> 9. If perforated lateral system is attached to manifold pipe near �"�""'�' . <br /> :�� - ="•�' , <br /> the center,as on page E-12,perforated lateral length and ��w_ +�- :=��. �:��� <br /> number of perforations per lateral will be approximately one <br /> .� <br /> half of that in step 8. Using these values,select minimum __ . � <br /> diameter for perforated lateral from page E-17 as r,25 •'� "" <br /> �� <br /> inches. <br />