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7 <br />TOTAL SIDEROLL HEADLOSS <br />WITH 5" LATERAL = (Sideroll Lenght {SRL} x f eadloss {181) x (F) <br />(2.31) x (100) <br />_ ( ))x )x( ) <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 (SRL) =_c ) x ( ) <br />2.31x100 2.31x100 <br />PRESSURE VARIATION: <br />+/- Psi (20) <br />Pressure due to elevation change <br />= Sideroll Headloss (19) + Elev Pressure Gain/Loss (20) <br />(DP) <br />_( ) + / -( ) x 100 <br />*PRESSURE VARIATION 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) + 1 <br />+0.75( ) + 1 =_ (MPS) <br />MANIFOLD LENGTH (ML)* =Field Length (L) - (1)(Sm) <br />Ix 60 ) _ ___ft (ML) <br />