Table Showing Friction Loss In Feet Head For Each 100 Feet Length Of New Straight
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CAST IRON OR WROUGHT IRON PIPE. FOR SHORT LINES THIS TABLE MAY ALSO BE USED FOR CONCRETE, ASBESTOS-CEMENT OR SHEET METAL PIPING
NOTE: The figures in Table 7 represent the loss 1 a percentage of the total length of pipe.
The friction head (H) may be interpolated for in rmediate quantities (Q) by using the approximate lation: —4- H 2 = Q x 2 -- q 2 2.
Straight direct leading pipes with the minimum of
bends should, if possible, always be arranged, and when the piping is long, the output large and high ° verall efficiency desired, taper pipes and increased bore , mam P l ? es are necessary. It is however neces sary to mamtam a balance between the increased cost of larger piping and the increased power costs incurred by the use of smaller piping.
Gallons Per Minute Flowing Through Pipe
iize of Pipe in Inches 5 10 15 20 25 30 35 40 45 50 60 ft. ft. ft. ft. ft. ft. ft. ft. ft. ft. ft. 1 3-4 13-3 29-5 51-0 78-0 H 1-2 4-5 10*0 17-0 27-0 39-0 52-0 68-0 85-0 .
H •5 1-7 3*8 6*5 10-0 14-8 20-0 26-0 32-0 40-0 57-0 •21 •8 1-8 3-1 4-8 7-0 9*3 12-0 15-0 19-0 27-0 2 •11 •4 •9 1-6 2-4 3-5 4-7 6-0 7-6 9-4 13-5 u — — — •5 •77 1-1 1-5 2-0 2-5 3-0 4-3 3 — — — — — •47 •63 •8 1-0 1-25 1*8 3£ — — — — — — — — — •55 •77 4 ““ — — — — — •4 ize of Pipe in Inches 70 80 90 100 110 120 130 140 150 160 ft. ft. ft. ft. ft. ft. ft. ft. ft. ft.
H 78-0 — — — 36-0 48-0 60-0 75-0 — 2 18-0 24-0 30-0 37-0 43-0 51-0 60-0 69-0 80-0 5*8 7-5 9-4 12-0 14-0 16-5 19-0 22-0 26-0 29-0 5 2-4 3-1 3-9 4-9 5-7 6-8 7-9 9-2 10-5 12-0 H 1-05 1-4 1-7 2-15 2-55 3-0 3-5 4-2 4-7 5-3 1 •55 •72 •9 1-12 1-3 1-58 1-82 2-15 2-4 2-75 3 — — •28 — •41 — — •66 •76 3 — — •13 — •19 — — •3 •34 — 1 — " — — — — •15 — ize of Pipe in Inches 170 180 190 200 210 220 230 250 300 350 400 ft. ft. ft. ft. ft. ft. ft.
St. ft. ft. ft. 32-0 36-0 40-0 45-0 49-0 54-0 — ! 13-3 14-9 16-4 18-5 20-0 22-0 22-0 27-5 40-0 1 2 6-0 6-6 7-3 8-3 9-1 10-0 10-8 12-5 18-0 24-2 , 31-9 3*1 3-45 3-8 4*25 4-7 5-2 5-6 6-45 9-3 12-5 16-3 > •96 — — 1-33 — — 1-77 2-05 3-0 4-0 5-2 1 •44 — — •6 — — •78 •92 1-3 1-75 2-27 r ... •19 — — •26 — — •34 •4 •57 •75 •99 \ — — — •135 — — •17 •20 •29 •38 •5 i — — — — — — — •12 •17 •23 •3 i — — — — — — — — •095 •127 • 166 ■ — — — — — — — — •07 ze of Pipe in Inches 450 500 600 700 800 900 1000 1100 1200 1300 ft. ft. ft. ft. ft. ft. ft. ft. ft. ft. t 20-0 25-0 34-0 — — — i 6-5 8-0 11-3 15-4 19-6 25-0 31-0 — — — 2-8 3-4 4-8 6-5 8-3 10-3 12-9 15-6 18-2 21-2 1-2 1-5 2-1 2-8 3-6 4-5 5-6 6-9 8-0 9-4 » •62 •76 1-07 1-44 . 1-83 2-3 2-8 3-43 4-05 4-75 •38 •46 •65 •87 1-1 1-4 1-7 2-1 2*45 2-83 1 •2 •25 •36 •48 •62 •77 •95 1-16 1-35 1-59 •086 •11 •15 •2 •26 •33 •4 •49 •58 •67 — — •079 •107 •137 •172 •214 •26 •304 •355 > — — — •065 •084 •105 •13 •157 •188 •22 — — — — •055 •07 •078 •103 •124 •143 — —■ — — — •043 •054 •064 •075 •086 — — — — — — — — — — •05