The wall thickness associated with a particular schedule depends on the pipe size as can be seen from the charts below for some of the more common sized carbon steel pipes encountered.
Abbreviations used: NB – nominal bore, STD – Standard, EH – Extra Heavy, DBL EH – Double Extra Heavy.
| 2″NB | OD = 2.375 inch (60.32 mm) | ||||||||||||
| Schedule | 5 | 10 | 20 | 30 | 40 STD |
60 | 80 EH |
100 | 120 | 140 | 160 | DBL EH | |
| ID (ins) | 2.245 | 2.157 | — | — | 2.067 | — | 1.939 | — | — | — | 1.689 | 1.503 | |
| ID (mm) | 57.02 | 54.79 | — | — | 52.5 | — | 49.25 | — | — | — | 42.9 | 38.18 | |
| 3″ NB | OD = 3.5 inch (88.9 mm) | |||||||||||||
| Schedule | 5 | 10 | 20 | 30 | 40 STD |
60 | 80 EH |
100 | 120 | 140 | 160 | DBL EH |
||
| ID (ins) | 3.334 | 3.260 | — | — | 3.068 | — | 2.900 | — | — | — | 2.624 | 2.300 | ||
| ID (mm) | 84.68 | 82.8 | — | — | 77.93 | — | 73.66 | — | — | — | 66.65 | 58.42 | ||
| 4″ NB | OD = 4.5 inch (114.3 mm) | |||||||||||||
| Schedule | 5 | 10 | 20 | 30 | 40 STD |
60 | 80 EH |
100 | 120 | 140 | 160 | DBL EH | ||
| ID (ins) | 4.334 | 4.260 | — | — | 4.026 | — | 3.826 | — | 3.624 | — | 3.438 | 3.152 | ||
| ID (mm) | 110.08 | 108.2 | — | — | 102.26 | — | 97.18 | — | 92.05 | — | 87.33 | 80.06 | ||
| 6″ NB | OD = 6.625 inch (168.275 mm) | |||||||||||||
| Schedule | 5 | 10 | 20 | 30 | 40 STD |
60 | 80 EH |
100 | 120 | 140 | 160 | DBL EH | ||
| ID (ins) | 6.407 | 6.357 | — | — | 6.065 | — | 5.761 | — | 5.501 | — | 5.189 | 4.897 | ||
| ID (mm) | 162.74 | 161.47 | — | — | 154.05 | — | 146.33 | — | 139.73 | — | 131.8 | 124.38 | ||
| 8″ NB | OD = 8.625 inch (219.1 mm) | |||||||||||||
| Schedule | 5 | 10 | 20 | 30 | 40 STD |
60 | 80 EH |
100 | 120 | 140 | 160 | DBL EH | ||
| ID (ins) | 8.407 | 8.329 | 8.125 | 8.071 | 7.981 | 7.813 | 7.625 | 7.439 | 7.189 | 7.001 | 6.813 | 6.375 | ||
| ID (mm) | 213.54 | 211.56 | 206.38 | 205 | 202.72 | 198.45 | 193.67 | 188.95 | 182.6 | 177.83 | 173.05 | 161.93 | ||
| 10″ NB | OD = 10.750 inch (273 mm) | |||||||||||||
| Schedule | 5 | 10 | 20 | 30 | 40 STD |
60 | 80 EH |
100 | 120 | 140 | 160 | DBL EH | ||
| ID (ins) | 10.482 | 10.42 | 10.25 | 10.136 | 10.02 | 9.750 | 9.564 | 9.314 | 9.064 | 8.750 | 8.500 | — | ||
| ID (mm) | 266.24 | 264.67 | 260.35 | 257.45 | 254.5 | 247.65 | 242.93 | 236.58 | 230.23 | 222.25 | 215.9 | — | ||
| 12″ NB | OD = 12.750 inch (323.85 mm) | |||||||||||||
| Schedule | 5 | 10 | 20 | 30 | 40 STD |
60 | 80 EH |
100 | 120 | 140 | 160 | DBL EH | ||
| ID (ins) | 12.42 | 12.39 | 12.25 | 12.09 | 11.938 12.000 |
11.626 | 11.376 11.750 |
11.064 | 10.75 | 10.50 | 10.126 | — | ||
| ID (mm) | 315.47 | 314.7 | 311.15 | 307.1 | 303.22 304.8 |
295.3 | 288.95 298.45 |
281.03 | 273.05 | 266.7 | 257.2 | — | ||
Releated References:
- Does Pipe Schedule Change With Pipe Size?
- What is a pipe schedule?
- What Standards Govern Pipe Schedule Sizes?
- Heavyweight Galvanized Pipe SS-40 Industrial Grade Fence Pipe
- Recommended Change-Out Schedule For Electronic Grade Gas Filters