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8/12/2019 2K Method Excess Head Loss in Pipe Fittings Rev1
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K1 K NRe
Nom. Pipe
Size,
inches Schedule
Pipe ID,
inches
Std (R/D =1), welded 800 0.25 1 2 40 2.067
2 3
4
5
10
15
20
25
50
75
100
125
150
175
200
300 400
500
Long-radius (R/D = 1.5), all types
800 0.2 1 2 40 2.067
2
3
4
5
10
15
20
25
50
75
100 125
150
175
200
300
400
500
Std (R/D =1), all types 500 0.2 1 2 40 2.067
2
3
4
5
10
15 20
25
50
75
100
125
150
175
200
300
400
500
Fitting Type
Elbow 90
Elbow 45
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8/12/2019 2K Method Excess Head Loss in Pipe Fittings Rev1
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K1 K NRe
Nom. Pipe
Size,
inches Schedule
Pipe ID,
inchesFitting Type
Long-radius (R/D =1.5), all types 500 0.15 1 2 40 2.067
2
3 4
5
10
15
20
25
50
75
100
125
150
175
200
300
400 500
Std (R/D =1), welded 1000 0.35 1 2 40 2.067
2
3
4
5
10
15
20
25
50
75
100 125
150
175
200
300
400
500
Long-radius (R/D =1.5), all types 1000 0.3 1 2 40 2.067
2
3
4
5
10
15 20
25
50
75
100
125
150
175
200
300
400
500
Elbow 180
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K1 K NRe
Nom. Pipe
Size,
inches Schedule
Pipe ID,
inchesFitting Type
Flow straight thru, welded or flanged 150 0.05 1 2 40 2.067
2 3
4
5
10
15
20
25
50
75
100
125
150
175
200
300 400
500
Flow thru side outlet, std., flanged/welded 800 0.8 1 2 40 2.067
2
3
4
5
10
15
20
25
50
75
100 125
150
175
200
300
400
500
Gate, Ball, plug (Full bore) ( = 1) 300 0.1 1 2 40 2.067
2
3
4
5
10 15
20
25
50
75
100
125
150
175
200
300
400
500
Tee-Equal
Valves
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K1 K NRe
Nom. Pipe
Size,
inches Schedule
Pipe ID,
inchesFitting Type
Gate, Ball, plug (Reducedl bore) ( = 0.9) 500 0.15 1 2 40 2.067
2 3
4
5
10
15
20
25
50
75
100
125
150
175
200
300 400
500
Gate, Ball, plug (Reducedl bore) ( = 0.8) 1000 0.25 1 2 40 2.067
2
3
4
5
10
15
20
25
50
75
100 125
150
175
200
300
400
500
Globe, standard 1500 4 1 2 40 2.067
2
3
4
5
10
15 20
25
50
75
100
125
150
175
200
300
400
500
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K1 K NRe
Nom. Pipe
Size,
inches Schedule
Pipe ID,
inchesFitting Type
Globe, angle or Y-type 1000 2 1 2 40 2.067
2 3
4
5
10
15
20
25
50
75
100
125
150
175
200
300 400
500
Butterfly 800 0.25 1 2 40 2.067
2
3
4
5
10
15
20
25
50
75
100 125
150
175
200
300
400
500
Check, Lift type 2000 10 1 2 40 2.067
2
3
4
5
10
15 20
25
50
75
100
125
150
175
200
300
400
500
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8/12/2019 2K Method Excess Head Loss in Pipe Fittings Rev1
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K1 K NRe
Nom. Pipe
Size,
inches Schedule
Pipe ID,
inchesFitting Type
Check, Swing type 1500 1.5 1 2 40 2.067
2 3
4
5
10
15
20
25
50
75
100
125
150
175
200
300 400
500
Check, Tilting Disk 1000 0.5 1 2 40 2.067
2
3
4
5
10
15
20
25
50
75
100 125
150
175
200
300
400
500
Prepared by: Ankur Srivastava
Chemical Engineer
e-mail: [email protected]
Disclaimer: The information and methods included within this spreadsheet are presented for calculation of 'K' factor & Equivalent L
(Le) of fittings/valves using '2-K method' for excess head loss in pipe fittings. It is intended to be used by technically skilled personsown discretion. I do not warrant the suitability or accuracy of these methods.
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8/12/2019 2K Method Excess Head Loss in Pipe Fittings Rev1
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Pipe Inside Diameter Table in InchesPipe
Nominal
Dia.,
inches
10 20 30 40 60 80 100 120 140 160 STD XS XXS
0.125NA NA NA 0.269 NA 0.215 NA NA NA NA 0.269 0.215 NA
0.25NA NA NA 0.364 NA 0.302 NA NA NA NA 0.364 0.302 NA
0.375NA NA NA 0.493 NA 0.423 NA NA NA NA 0.493 0.423 NA
0.5 0.674 NA NA 0.622 NA 0.546 NA NA NA 0.464 0.622 0.546 0.252
0.75 0.884 NA NA 0.824 NA 0.742 NA NA NA 0.612 0.824 0.742 0.434
1 1.097 NA NA 1.049 NA 0.957 NA NA NA 0.815 1.049 0.957 0.599
1.25NA NA NA 1.38 NA 1.278 NA NA NA 1.16 1.38 1.278 0.896
1.5 1.682 NA NA 1.61 NA 1.5 NA NA NA 1.338 1.61 1.5 1.1
2 2.157 NA NA 2.067 NA 1.939 NA NA NA 1.689 2.067 1.939 1.503
2.5 2.635 NA NA 2.469 NA 2.323 NA NA NA 2.125 2.469 2.323 1.771
3 3.26 NA NA 3.068 NA 2.9 NA NA NA 2.624 3.068 2.9 2.3
3.5 3.76 NA NA 3.548 NA 3.364 NA NA NA NA 3.548 3.364 2.728
4 4.26 NA NA 4.026 NA 3.826 NA 3.624 NA 3.438 4.026 3.826 3.152
5NA NA NA 5.047 NA 4.813 NA 4.563 NA 4.313 5.047 4.813 4.063
6 6.357 NA NA 6.065 NA 5.761 NA 5.486 NA 5.187 6.065 5.761 4.897
8 8.329 8.125 8.071 7.981 7.813 7.625 7.437 7.187 7.001 6.813 7.981 7.625 6.875
10 10.42 10.25 10.136 10.02 9.75 9.564 9.312 9.062 8.75 8.5 10.02 9.75 8.75
12 12.39 12.25 12.09 11.938 11.626 11.376 11.062 10.75 10.5 10.126 12 11.75 10.75
14 13.5 13.376 13.25 13.126 12.812 12.5 12.124 11.812 11.5 11.188 13.25 13 NA
16 15.5 15.376 15.25 15 14.688 14.314 13.938 13.562 13.124 12.812 15.25 15 NA
18 17.5 17.376 17.126 16.876 16.5 16.126 15.688 15.25 14.876 14.438 17.25 17 NA
20 19.5 19.25 19 18.814 18.376 17.938 17.438 17 16.5 16.062 19.25 19 NA
22 21.5 21.25 21 NA 20.25 19.75 19.25 18.75 18.25 17.75 21.25 21 NA
24 23.5 23.25 22.876 22.626 22.062 21.564 20.938 20.376 19.876 19.312 23.25 23 NA
26 25.376 25 NA NA NA NA NA NA NA NA 25.25 25 NA
28 27.376 27 26.75 NA NA NA NA NA NA NA 27.25 27 NA
30 29.376 29 28.75 NA NA NA NA NA NA 29 29.25 29 NA
32 31.376 31 30.75 30.624 NA NA NA NA NA NA 31.25 31 NA
34 33.376 33 32.75 32.624 NA NA NA NA NA NA 33.25 33 NA36 35.376 35 34.75 34.5 NA NA NA NA NA NA 35.25 35 NA
38NA NA NA NA NA NA NA NA NA NA 37.25 37 NA
40NA NA NA NA NA NA NA NA NA NA 39.25 39 NA
42NA NA NA NA NA NA NA NA NA NA 41.25 41 NA
44NA NA NA NA NA NA NA NA NA NA 43.25 43 NA
46NA NA NA NA NA NA NA NA NA NA 45.25 45 NA
48NA NA NA NA NA NA NA NA NA NA 47.25 47 NA
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Pipe Schedule
