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0 <br />TOTAL SIDEROLL HEADLOSS <br />WITH 5" LATE.R.AL = (Sideroll Lenght {SRLJ x Headloss 081)(F) <br />(2.31) x (100) <br />L ) x xt <br />2.31 x 100 <br />(19) <br />PRESSURE GAIN (or LOSS) DUE TO FIELD SLOPE _ <br />Note" Look at most restrictive conditions <br />in an entire field <br />(S)% x (SELj )x( ) <br />2.31x100 2.31x100 <br />+/- psi (20) <br />pressure due to elevation change <br />• PRESSURE VARIATION: <br />= Sideroll Headloss (19) + Elev pressure Gain /Loss (20) <br />(DP) <br />x 100 <br />7 <br />PRESSURE VA.R.IATION MUST NOT EXCEED +/ -10 % OF DP. If flow control nozzles are <br />used, then =/ -10 %pressure limit can be dealt with easily. <br />REQUIRED PRESSURE AT MAINLINE AT BEGINNING OF SIDEROLL (MPS) <br />For Level Laterals = (DP) + 0.75 (19) + I <br />+0.75( ) + I (MPS) <br />MANIFOLD LENGTH (ML)* =Field Length (L) - (1)(Sm) <br />_( ) -(1x60 ) = ft(ML) <br />