Nominal Pipe Size
( in. )
Outside Diameter
( in. )
Inside Diameter
Wall thickness
( in. )
Flow Area
( in.)
( ft. )
( in2 )
( ft2 )
1/8
0.405
0.269
0.0224
0.068
0.0568
0.000394
1/4
0.540
0.364
0.0303
0.088
0.1041
0.000723
3/8
0.675
0.493
0.0411
0.091
0.1910
0.00133
1/2
0.840
0.622
0.0518
0.109
0.304
0.00211
3/4
1.050
0.824
0.0687
0.113
0.533
0.00370
1
1.315
1.049
0.0874
0.133
0.864
0.00600
1 1/4
1.660
1.380
0.1150
0.140
1.496
0.01039
1 1/2
1.900
1.610
0.1342
0.145
2.036
0.01414
2
2.375
2.067
0.1723
0.154
3.36
0.02333
2 1/2
2.875
2.469
0.2058
0.203
4.79
0.03326
3
3.500
3.068
0.2557
0.216
7.39
1.05132
3 1/2
4.000
3.548
0.2957
0.226
9.89
0.06868
4
4.500
4.026
0.3355
0.237
12.73
0.08840
5
5.563
5.047
0.4206
0.258
20.01
0.1390
6
6.625
6.065
0.5054
0.280
28.89
0.2006
8
8.625
7.981
0.6651
0.322
50.0
0.3472
10
10.750
10.020
0.8350
0.365
78.9
0.5479
12
12.750
11.938
0.9948
0.406
111.9
0.7771
14
14.000
13.126
1.094
0.437
135.3
0.9396
16
16.000
15.000
1.250
0.500
176.7
1.227
18
18.000
16.876
1.406
0.562
223.7
1.553
20
20.000
18.814
1.568
0.593
278.0
1.931
24
24.000
22.626
1.886
0.687
402
2.792
Nominal Pipe Size
( in. )
Outside Diameter
( in. )
Inside Diameter
Wall thickness
( in. )
Flow Area
( in.)
( ft. )
( in2 )
( ft2 )
1/8
0.405
0.215
0.01792
0.095
0.0364
0.000253
1/4
0.540
0.302
0.02517
0.119
0.0716
0.000497
3/8
0.675
0.423
0.03525
0.126
0.1405
0.000976
1/2
0.840
0.546
0.04550
0.147
0.2340
0.001625
3/4
1.050
0.742
0.06183
0.154
0.432
0.00300
1
1.315
0.957
0.07975
0.179
0.719
0.00499
1 1/4
1.660
1.278
0.1065
0.191
1.283
0.00891
1 1/2
1.900
1.500
0.1250
0.200
1.767
0.01227
2
2.375
1.939
0.1616
0.218
2.953
0.02051
2 1/2
2.875
2.323
0.1936
0.276
4.24
0.02944
3
3.500
2.900
0.2417
0.300
6.61
0.04590
3 1/2
4.000
3.364
0.2803
0.318
8.89
0.06174
4
4.500
3.826
0.3188
0.337
11.50
0.07986
5
5.563
4.813
0.4011
0.375
18.19
0.1263
6
6.625
5.761
0.4801
0.432
26.07
0.1810
8
8.625
7.625
0.6354
0.500
45.7
0.3174
10
10.750
9.564
0.7970
0.593
71.8
0.4986
12
12.750
11.376
0.9480
0.687
101.6
0.7056
14
14.000
12.500
1.042
0.750
122.7
0.8521
16
16.000
14.314
1.193
0.842
160.9
1.117
18
18.000
16.126
1.344
0.937
204.2
1.418
20
20.000
17.938
1.495
1.031
252.7
1.755
24
24.000
21.564
1.797
1.218
365
2.535
Pipe Dimensions and Properties (Schedule 40, Schedule 80)
Applied Statics and Strength of Materials . 2nd ed. Upper Saddle River, NJ: Prentice Hall, 1991.]
