NORTH AMERICAN PIPE SCHEDULES
Steel, Stainless Steel, PVC Pipe, Standard Classes
NPS
in.
OD
in.
SCH 60 X STG. SCH 80 SCH 100 SCH 120/140 SCH 180
ID
in.
Wall
in.
ID
in.
Wall
in.
ID
in.
Wall
in.
ID
in.
Wall
in.
ID
in.
Wall
in.
ID
in.
Wall
in.
1 1.315
—
0.957 0.179 0.957 0.179
— —
0.815 0.250
1.25 1.660 1.278 0.191 1.278 0.191 1.160 0.250
1.5 1.900 1.500 0.200 1.500 0.200 1.338 0.281
2 2.375 1.939 0.218 1.939 0.218 1.687 0.344
2.5 2.875 2.323 0.276 2.323 0.276 2.125 0.375
3 3.500 2.900 0.300 2.900 0.300 2.624 0.438
3.5 4.000
—
3.364 0.318 3.364 0.318
—
— —
4 4.500 3.826 0.337 3.826 0.337 3.624 0.438 3.438 0.531
5 5.563 4.813 0.375 4.813 0.375 4.563 0.500 4.313 0.625
6 6.625 5.761 0.432 5.761 0.432 5.501 0.562 5.187 0.719
8 8.625 7.813 0.406 7.625 0.500 7.625 0.500 7.437 0.594 7.178 0.719 6.183 1.221
10 10.75 9.750 0.500 9.75 0.500 9.562 0.594 9.312 0.719 9.062 0.844 8.500 1.125
12 12.75 11.626 0.562 11.75 0.500 11.37 0.690 11.06 0.845 10.75 1.000 10.12 1.315
14 14.00 12.814 0.593 13.00 0.500 12.50 0.750 12.31 0.845 11.81 1.095 11.18 1.410
16 16.00 14.688 0.656 15.00 0.500 14.31 0.845 13.93 1.035 13.56 1.220 12.81 1.595
18 18.00 16.564 0.718 17.00 0.500 16.12 0.940 15.68 1.160 15.25 1.375 14.43 1.785
20 20.00 18.376 0.812 19.00 0.500 17.93 1.035 17.43 1.285 17.00 1.500 16.06 1.970
24 24.00 22.126 0.937 23.00 0.500 21.56 1.220 20.93 1.535 20.93 1.535 19.31 2.345
30 30.00
—
29.00 0.500
— — — —
36 36.00 35.00 0.500
42 42.00 41.00 0.500
48 48.00 47.00 0.500
Table 21: Steel, stainless steel, PVC pipe, standard classes
North American Pipe Schedules
Page 110 May 2016TTM-UM-00136-EN-06