2000 Hook-up Book
Friction Head Loss for Water
Table 36: Equivalent Length in Feet of New Straight Pipe for Valves and Fittings for Turbulent Flow Only Pipe Size 1/4 3/8 1/2 3/4 1 1 1 / 4 1 1 / 2 2 2 1 / 2 3 4 5 6 8 10 12 14 16 18 20 24 2.3 3.1 3.6 4.4 5.2 6.6 7.4 8.5 9.3 11 13 9.0 11 .92 1.2 1.6 2.1 2.4 3.1 3.6 4.4 5.9 7.3 8.9 12 14 17 18 21 23 25 30 3.6 4.8 7.2 9.8 12 15 17 19 22 24 28 1.5 2.0 2.2 2.3 2.7 3.2 3.4 3.6 3.6 4.0 4.6 3.3 3.7 1.1 1.3 1.6 2.0 2.3 2.7 2.9 3.4 4.2 5.0 5.7 7.0 8.0 9.0 9.4 10 11 12 14 2.8 3.4 4.7 5.7 6.8 7.8 8.6 9.6 11 11 13 .34 .52 .71 .92 1.3 1.7 2.1 2.7 3.2 4.0 5.5 3.3 4.5 .45 .59 .81 1.1 1.3 1.7 2.0 2.6 3.5 4.5 5.6 7.7 9.0 11 13 15 16 18 22 2.1 2.9 4.5 6.3 8.1 9.7 12 13 15 17 20 .79 1.2 1.7 2.4 3.2 4.6 5.6 7.7 9.3 12 17 9.9 14 .69 .82 1.0 1.3 1.5 1.8 1.9 2.2 2.8 3.3 3.8 4.7 5.2 6.0 6.4 7.2 7.6 8.2 9.6 1.9 2.2 3.1 3.9 4.6 5.2 5.9 6.5 7.2 7.7 8.8 2.4 3.5 4.2 5.3 6.6 8.7 9.9 12 13 17 21 14 17 2.0 2.6 3.3 4.4 5.2 6.6 7.5 9.4 12 15 18 24 30 34 37 43 47 52 62 7.7 10 15 20 25 30 35 39 44 49 57 2.3 3.1 3.6 4.4 5.2 6.6 7.4 8.5 9.3 11 13 9.0 11 .92 1.2 1.6 2.1 2.4 3.1 3.6 4.4 5.9 7.3 8.9 12 14 17 19 21 23 25 30 3.6 4.8 7.2 9.8 12 15 17 19 22 24 28 1.1 1.3 1..6 2.0 2.3 2.7 2.9 3.4 4.2 5.0 5.7 7.0 8.0 9.0 9.4 10 11 12 14 2.8 3.4 4.7 5.7 6.8 7.8 8.6 9.6 11 11 13 21 22 22 24 29 37 42 54 62 79 110 65 86 38 40 45 54 59 70 77 94 120 150 190 260 310 390 77 99 150 210 270 330 .32 .45 .56 .67 .84 1.1 1.2 1.5 1.7 1.9 2.5 1.6 2.0 2.6 2.7 2.8 2.9 3.1 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 2.3 2.4 2.6 2.7 2.8 2.9 2.9 3.0 3.0 3.0 3.0 12.8 15 15 15 17 18 18 18 18 18 18 15 15 15 15 17 18 18 21 22 28 38 50 63 90 120 140 160 190 210 240 300 23 31 52 74 98 120 150 170 200 230 280 7.2 7.3 8.0 8.8 11 13 15 19 22 27 38 22 31 3.8 5.3 7.2 10 12 17 21 27 38 50 63 90 120 140 22 31 52 74 98 120 .14 .18 .21 .24 .29 .36 .39 .45 .47 .53 .65 .44 .52 .04 .07 .10 .13 .18 .26 .31 .43 .52 .67 .95 1.3 1.6 2.3 2.9 3.5 4.0 4.7 5.3 6.1 7.6 .55 .77 1.3 1.9 2.4 3.0 3.6 4.3 5.0 5.7 7.0 .44 .68 .96 1.3 1.8 2.6 3.1 4.3 5.2 6.7 9.5 13 16 23 29 35 40 47 53 61 76 5.5 7.7 13 19 24 30 36 43 50 57 70 .88 1.4 1.9 2.6 3.6 5.1 6.2 8.5 10 13 19 25 32 45 58 70 80 95 110 120 150 11 15 26 37 49 61 73 86 100 110 140 4.6 5.0 6.6 7.7 18 20 27 29 34 42 53 61 Fittings Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Reg. Steel Flanged C.I. Long Rad Steel Flanged C.I. Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Flanged Steel C.I. Screwed Steel C.I. Bell Mouth Steel Inlet C.I. Square Steel Mouth Inlet C.I. Re-entrant Steel Pipe C.I. Y Regular 90° ELL Regular 45° ELL 180° Return Bend Coupling or Union Tee- Line Flow
SYSTEM DESIGN
Long Radius 90° ELL
Tee- Branch Flow
Globe Valve
Gate Valve
Angle Valve
Swing Check Valve
Strainer Sudden Enlarge ment
2 FEET OF LIQUID
h = (V 1 - V 2 ) 2 FEET OF LIQUID; IF V 2 = 0 h = V 1
2g
2g
Reprinted from the STANDARDS OF THE HYDRAULIC INSTITUTE, Eleventh Edition. Copyright 1965 by the Hydraulic Institute, 122 East 42nd Street, New York, New York 10017.
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