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4...,T,,.zyr..,,.,m.t�s•,wP,..,T, �'�:�.,��, ,�/i�:�"7�7/�,,t7/'s,�.'�T�::�7�-e+�rru�r*C'Ki.R��.c?.-. .w,t. u:��r^- .. � :a
<br /> ,. � ��l��`. i���� 'r^�: l{ /';� �' i4'w i"—•! /(_ / J'; L,�,r��.�
<br /> !R":3R'
<br /> ¢ pRESSURE DISTRIBUTiON SYSTEM
<br /> 1. Select number of perforated laterals .;::;� �
<br /> ��;
<br /> -, :;:'.
<br /> 2. Select perforation spacing = � ft.
<br /> 3. Since perforations silould not be placed closer than 1 ft. ro =�
<br /> the edge of the rock layer (see p. F-14), subtract 2 ft. from the
<br /> rock layer length.
<br /> ,-<'
<br /> Rcx�k laycr lenRth — � �t. _ � f t.
<br /> '-=,`�,
<br /> 4. Determine the number of spaces between perforations.
<br /> Divide the length above by perforation spacing and round E-17a
<br /> docvn to nearest whole number.
<br /> TABLE OFPERFORATION D[SCHARCES I.ti Cf'".'
<br /> - Head Perfora�ion cii,unetr.:(inches)
<br /> Length perf. spacing =.�• ''�� ft. �- :::. ft. _ � _ spaces �i3z ��a
<br /> �3� �2� I.Oa OS6 0.��
<br /> 1.5 0.69 0.90
<br /> 5. Number of perforations is equal to one plus the number of z.ob �,�� �.oa
<br /> 2.5 089 1.17
<br /> perforation spaces . 3.o aya �zs
<br /> 4.0 1.13 1.4i
<br /> 5.0 1.26 1.65
<br /> � spaces + 1 = %� ''� perforations/lateral aUse lA foot of head for residential systems
<br /> bUse 2.0 feet of head(or other establishments
<br /> 6. Multiply perforations per lateral by number of laterals to
<br /> get total number of perforations. E-17b
<br /> - �_ �,.��,�.�.��,���e,�,x..m,��.,,o
<br /> _" x = ;;.�.<��� erforations. m ".�"<�°` ""'°�'°°
<br /> laterals perfs/lateral � «�'p"°� 115 inch 1.5 inch 2.0 ir,_r
<br /> 2.5 14 18 2�3
<br /> 7. Deter.nine required flo��: rate by :nultiplying 3.0 13 t� � z�
<br /> number of perforations by flow per perforation a:o ii is � z�
<br /> (see page E -17; s.o io ia l z,
<br /> c� ,�fs X �:��...� L��' fic r... �: � ;
<br /> 1 "'�;i� ;,. `�'�
<br /> , WwiOID lO4!m�T 00�1�[]}K OT��wR�f-+��� �
<br /> __w__..�__,__
<br /> .��,�.... ..f.'� .._ -,x
<br /> .
<br /> 8. If laterals are connected to header pipe as shown on page E-
<br /> z
<br /> 15, select minimum requireci l�teral diameter from table on
<br /> page E-17; enter table with perforatinn spacing and number �_.�;�.•�''� ����'
<br /> of perforations per lateral. S�leci .ninimum diameter for �,j�
<br /> perforated lateral = - - incheti.
<br /> F.-12
<br /> �.�...� .,....._._,,..
<br /> ��. If perforated lat�r�: sti stem is attached to manifold pipe near ����,�" ,..
<br /> �:—.-•� ,,.�--
<br /> the center, z: on page E-12, perforated lateral length and '�'^�
<br /> -�
<br /> num�>er oE �.�erforations per lateral will be approximately one "�''��'�� �
<br /> "�'L7•L"�
<br /> half of that in step f3. Using these values, select minimum _� . ,�
<br /> diameter for �erforated lateral from page E-17 as �,,.-�� "'-"
<br /> inches.
<br /> �; , ;-::_ .:.>��
<br />
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