Pipe Schedule and Wall Thickness Explained:
In the world of piping, understanding the relationship between pipe schedule and wall thickness is paramount. Pipe schedule, denoted by numbers like “Sch 40” or “Sch 80,” signifies the thickness of the pipe’s walls. The higher the schedule number, the thicker the wall. Wall thickness is a critical factor in pipeline integrity, affecting the pipe’s capacity to handle pressure, temperature, and external forces. Choosing the right schedule ensures a safe and efficient flow of fluids through the pipeline, making it an essential consideration in pipeline design and construction.
t’s important to note that while higher schedule numbers indicate thicker walls and increased strength, they also come with added weight and cost. Therefore, striking a balance between strength and practicality is essential, and pipe schedule charts play a vital role in achieving this equilibrium. Proper wall thickness selection is essential for pipeline safety and efficiency, making pipe schedules a valuable tool in the world of piping.
Standard Pipe Schedule & Wall Thickness Chart - ASME B36.10M
wdt_ID | Nom. NPS (in) | O.D (in) | SCH 5 | SCH 10 | SCH 20 | SCH 30 | SCH STD | SCH 40 | SCH 60 | SCH XS | SCH 80 | SCH 100 | SCH 120 | SCH 140 | SCH 160 | SCH XXS |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 1/8 | 0.405 | 0.035 | 0.049 | 0.068 | 0.068 | 0.095 | 0.095 | ||||||||
2 | 1/4 | 0.540 | 0.049 | 0.065 | 0.088 | 0.088 | 0.119 | 0.119 | ||||||||
3 | 3/8 | 0.675 | 0.049 | 0.065 | 0.091 | 0.091 | 0.126 | 0.126 | ||||||||
4 | 1/2 | 0.840 | 0.065 | 0.083 | 0.109 | 0.109 | 0.147 | 0.147 | 0.187 | 0.294 | ||||||
5 | 3/4 | 1.050 | 0.065 | 0.083 | 0.113 | 0.113 | 0.154 | 0.154 | 0.218 | 0.308 | ||||||
6 | 1 | 1.315 | 0.065 | 0.109 | 0.133 | 0.133 | 0.179 | 0.179 | 0.250 | 0.358 | ||||||
7 | 1.25 | 1.66 | 0.065 | 0.109 | 0.140 | 0.140 | 0.191 | 0.191 | 0.250 | 0.382 | ||||||
8 | 1.5 | 1.90 | 0.065 | 0.109 | 0.145 | 0.145 | 0.200 | 0.200 | 0.281 | 0.400 | ||||||
9 | 2 | 2.375 | 0.065 | 0.109 | 0.154 | 0.154 | 0.218 | 0.218 | 0.343 | 0.436 | ||||||
10 | 2.5 | 2.875 | 0.083 | 0.120 | 0.203 | 0.203 | 0.276 | 0.276 | 0.375 | 0.552 | ||||||
11 | 3 | 3.5 | 0.083 | 0.120 | 0.216 | 0.216 | 0.300 | 0.300 | 0.437 | 0.600 | ||||||
12 | 3.5 | 4.0 | 0.083 | 0.120 | 0.226 | 0.226 | 0.318 | 0.318 | 0.636 | |||||||
13 | 4 | 4.5 | 0.083 | 0.120 | 0.237 | 0.237 | 0.281 | 0.337 | 0.337 | 0.437 | 0.531 | 0.674 | ||||
14 | 4.5 | 5.0 | 0.247 | 0.355 | 0.710 | |||||||||||
15 | 5 | 5.563 | 0.109 | 0.134 | 0.258 | 0.258 | 0.375 | 0.375 | 0.500 | 0.625 | 0.750 | |||||
16 | 6 | 6.625 | 0.109 | 0.134 | 0.280 | 0.280 | 0.432 | 0.432 | 0.562 | 0.718 | 0.864 | |||||
17 | 7 | 7.625 | 0.301 | 0.500 | 0.875 | |||||||||||
18 | 8 | 8.625 | 0.109 | 0.148 | 0.250 | 0.277 | 0.322 | 0.322 | 0.406 | 0.500 | 0.500 | 0.593 | 0.718 | 0.812 | 0.906 | 0.875 |
19 | 9 | 9.625 | 0.342 | 0.500 | ||||||||||||
20 | 10 | 10.75 | 0.134 | 0.165 | 0.250 | 0.307 | 0.365 | 0.365 | 0.500 | 0.500 | 0.593 | 0.718 | 0.843 | 1.000 | 1.125 | |
21 | 11 | 11.75 | 0.375 | 0.500 | ||||||||||||
22 | 12 | 12.75 | 0.165 | 0.180 | 0.250 | 0.330 | 0.375 | 0.406 | 0.562 | 0.500 | 0.687 | 0.843 | 1.000 | 1.125 | 1.312 | |
23 | 14 | 14.0 | 0.250 | 0.312 | 0.375 | 0.375 | 0.437 | 0.593 | 0.500 | 0.750 | 0.937 | 1.093 | 1.250 | 1.406 | ||
24 | 16 | 16.0 | 0.250 | 0.312 | 0.375 | 0.375 | 0.500 | 0.656 | 0.500 | 0.843 | 1.031 | 1.218 | 1.437 | 1.593 | ||
25 | 18 | 18.0 | 0.250 | 0.312 | 0.437 | 0.375 | 0.562 | 0.750 | 0.500 | 0.937 | 1.156 | 1.375 | 1.562 | 1.781 | ||
26 | 20 | 20.0 | 0.250 | 0.375 | 0.500 | 0.375 | 0.593 | 0.812 | 0.500 | 1.031 | 1.280 | 1.500 | 1.750 | 1.968 | ||
27 | 24 | 24.0 | 0.250 | 0.375 | 0.562 | 0.375 | 0.687 | 0.968 | 0.500 | 1.218 | 1.531 | 1.812 | 2.062 | 2.343 | ||
28 | 26 | 26.0 | 0.312 | 0.500 | 0.375 | 0.500 | ||||||||||
29 | 28 | 28.0 | 0.312 | 0.500 | 0.625 | 0.375 | ||||||||||
30 | 30 | 30.0 | 0.312 | 0.500 | 0.625 | 0.375 | 0.500 | |||||||||
31 | 32 | 32.0 | 0.312 | 0.500 | 0.625 | 0.375 | 0.688 | 0.500 | ||||||||
32 | 34 | 34.0 | 0.312 | 0.500 | 0.625 | 0.375 | 0.688 | |||||||||
33 | 36 | 36.0 | 0.312 | 0.625 | 0.375 | 0.750 | 0.500 | |||||||||
34 | 42 | 42.0 | 0.375 | 0.500 | ||||||||||||
35 | 48 | 48.0 | 0.375 | 0.500 | ||||||||||||
Nom. NPS (in) | O.D (in) |