Laserfiche WebLink
Crone High School DrawingDate:i2r 3t_L4/30/18 11:22 <br /> `age <br /> FITTING NAME _'. BLE <br /> A2DREY%. NAME <br /> C Coupling <br /> 90' Standard Elbow <br /> F 45' Elbow <br /> S Straight Flow Thru Tee <br /> T 90' Flow Thru Tee <br /> V Valve <br /> LEGEND <br /> HYD REF Hydraulic reference. Refer to accompanying flow diagram. _ <br /> K FACTOR Flow factor for open head or path where Flow (gpm) = K x -\/P <br /> Qa Flow added or subtracted <br /> Qt Total flow <br /> DIA Actual internal diameter of pipe <br /> C Hazen Williams pipe roughness factor <br /> Pf/ft Friction loss per foot of pipe <br /> PIPE Length of pipe <br /> FTNG'S Number of fittings. See table above. <br /> TOTAL Total length (PIPE + FTNG'S) <br /> Pt Total pressure (psi) at fitting <br /> Pe Pressure due to change in elevation <br /> where Pe = 0.433 x change in elevation <br /> Pf Friction loss (psi) to fitting <br /> where Pf = 1 x 4 . 52 x (Q/C) ^1. 85 / ID^4 .87 <br /> Pv Velocity pressure (psi) <br /> where Pv = 0.001123 x Q^2/ID^4 <br /> Pn. Normal pressure (psi) , where Pn = Pt - Pv <br /> NOTES: <br /> - Pressures are balanced to 0.01 psi. Pressures are listed to <br /> 0.1 psi. Addition may vary by 0. 1 psi due to accumulation of <br /> round off. <br /> - Calculations conform to NFPA 13. <br /> - Velocity Pressures are not considered in these Calculations <br />