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Friction Loss Table Chart

Volume rate of flow LPM

Nominal Pipe outer dia. in mm
25
32
40
50
65
80
100
125
150
Friction loss in mtr
30
0.364
-
-
-
-
-
-
-
-
60
1.315
0.341
-
-
-
-
-
-
-
75
1.988
0.516
0.246
-
-
-
-
-
-
96
3.140
0.814
0.388
-
-
-
-
-
-
120
-
1.231
0.587
-
-
-
-
-
-
150
-
1.861
0.888
0.282
-
-
-
-
-
192
-
2.940
1.402
0.190
0.126
-
-
-
-
240
-
-
2.120
0.288
0.190
-
-
-
-
300
-
-
3.205
0.887
0.288
-
-
-
-
480
-
-
-
1.038
0.887
0.313
-
-
-
600
-
-
-
1.570
1.038
0.474
0.131
-
-
750
-
-
-
2.479
1.570
0.716
0.198
-
-
960
-
-
-
3.747
2.479
1.131
0.312
0.111
-
1200
-
-
-
-
3.747
1.710
0.472
0.167
-
1500
-
-
-
-
-
2.585
0.713
0.253
0.106
1920
-
-
-
-
-
4.033
1.127
0.400
0.157
2400
-
-
-
-
-
-
1.704
0.605
0.252
3000
-
-
-
-
-
-
2.576
0.914
0.351
3600
-
-
-
-
-
-
-
1.281
0.534
4800
-
-
-
-
-
-
-
0.182
0.910
6000
-
-
-
-
-
-
-
3.299
1.376
7500
-
-
-
-
-
-
-
-
0.051
Permissible Flow Rate Table

Grade

Nominal Pipe outer dia. in mm
40
50
60
80
100
125
150
Friction loss in mtr
Light (A-class)
114 - 164
164 - 314
314 - 598
598 - 932
932 - 1850
-
-
Medium (B-class)
107 - 160
160 - 297
297 - 588
588 - 898
898 - 1800
1800 - 3150
3150 - 5088
Heavy (C-class)
95 - 144
144 - 272
272 - 550
550 - 852
852 - 1720
1720 - 3082
3082 - 4957

Friction loss in metres for 10 mtrs. long pipe (C=150)
Permissible ranges of volume rates of flow (LPM) to limit friction losses to 10 % of the pipe length.

 
Friction Loss Table Chart

Volume rate of flow LPM

Nominal Pipe outer dia. in mm
25
32
40
50
65
80
100
125
150
Friction loss in mtr
30
0.364
-
-
-
-
-
-
-
-
60
1.315
0.341
-
-
-
-
-
-
-
75
1.988
0.516
0.246
-
-
-
-
-
-
96
3.140
0.814
0.388
-
-
-
-
-
-
120
-
1.231
0.587
-
-
-
-
-
-
150
-
1.861
0.888
0.282
-
-
-
-
-
192
-
2.940
1.402
0.190
0.126
-
-
-
-
240
-
-
2.120
0.288
0.190
-
-
-
-
300
-
-
3.205
0.887
0.288
-
-
-
-
480
-
-
-
1.038
0.887
0.313
-
-
-
600
-
-
-
1.570
1.038
0.474
0.131
-
-
750
-
-
-
2.479
1.570
0.716
0.198
-
-
960
-
-
-
3.747
2.479
1.131
0.312
0.111
-
1200
-
-
-
-
3.747
1.710
0.472
0.167
-
1500
-
-
-
-
-
2.585
0.713
0.253
0.106
1920
-
-
-
-
-
4.033
1.127
0.400
0.157
2400
-
-
-
-
-
-
1.704
0.605
0.252
3000
-
-
-
-
-
-
2.576
0.914
0.351
3600
-
-
-
-
-
-
-
1.281
0.534
4800
-
-
-
-
-
-
-
0.182
0.910
6000
-
-
-
-
-
-
-
3.299
1.376
7500
-
-
-
-
-
-
-
-
0.051
Permissible Flow Rate Table

Capacity / Grade

Nominal Pipe outer dia. in mm
40
50
63
75
90
110
125
140
160
Friction loss in mtr
2.5 kg/cm (0.25Mpa)
-
-
-
-
690 - 1174
1174 - 1995
1995 - 2798
2798 - 3775
3775 - 5357
4.0 kg/cm (0.40Mpa)
-
-
228 - 434
434 - 688
688 - 1110
1110 - 1902
1902 - 2660
2660 - 3587
3587 - 5097
6.0 kg/cm (0.60Mpa)
Up to 122
122 - 222
222 - 406
406 - 645
645 - 1044
1044 - 1785
1785 - 2486
2486 - 3358
3358 - 4785

Friction loss in metres for 10 mtrs. long pipe (C=150)
Permissible ranges of volume rates of flow (LPM) to limit friction losses to 10 % of the pipe length

 
Head – Loss Table
Length of Straight Pipe in Metres Giving Equivalent Head Loss in Pipe Fittings, Valves etc

Size of Pipe in mm

Nominal Pipe outer dia. in mm
Standard Elbow
Medium Elbow
Long Radius Elbow
45° Elbow
Tee
Sliuce Valve Full Open
Globe Valve Full Open
Angle Valve Open
Foot Valve or Reflux Valve
Friction loss in mtr
25
0.82
0.70
0.52
0.40
1.77
0.18
8.24
4.57
2.04
40
1.31
1.10
0.85
0.61
2.74
0.29
13.4
6.71
3.05
50
1.67
1.40
1.07
0.76
3.35
0.37
17.4
8.54
3.96
65
1.98
1.65
1.28
0.92
4.26
0.42
20.1
10.0
5.18
65
1.98
1.65
1.28
0.92
4.26
0.42
20.1
10.0
5.18
80
2.47
2.00
1.55
1.15
5.18
0.52
25.9
12.8
6.10
100
3.35
2.77
2.13
1.53
6.71
0.70
33.5
17.7
8.23
125
4.26
3.66
2.78
1.86
8.24
0.88
42.6
21.2
10.0
150
4.87
4.26
3.35
2.35
10.0
1.07
48.7
25.3
12.2
200
6.40
5.48
4.26
3.05
13.1
1.37
67.1
33.5
16.2
250
7.62
6.71
5.18
3.86
17.1
1.74
88.5
42.6
20.4
300
9.75
7.92
6.10
4.57
20.1
2.04
100.5
51.8
24.4