Steel Pipe Sizes and Schedules
All the piping used by CRP is dimensionally to ASME B36.1 /API 5L
The nominal bore is loosely related to the i/d of the pipe, there are different wall thicknesses or schedules available for each size, the o/d stays constant for each NB, the heavier the schedule of pipe the smaller the bore.
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Inches
|
NB |
DN |
OD (inches) |
Pipe Schedule |
|
SCH 5 |
SCH 10 |
SCH
20 |
SCH 30 |
SCH 40 |
SCH 60 |
SCH 80 |
SCH 100 |
SCH 120 |
SCH 160 |
|
3/4" |
20 |
1.05 |
0.065 |
0.11 |
x |
0.095 |
0.113 |
x |
x |
0.17 |
x |
0.219
|
|
1" |
25 |
1.315 |
0.065 |
0.11 |
x |
0.114 |
0.133 |
x |
x |
0.2 |
x |
0.25 |
|
1.1/2" |
40 |
1.9 |
0.065 |
0.11 |
x |
0.125 |
0.145 |
x |
x |
0.225 |
x |
0.281 |
|
2" |
50 |
2.375 |
0.065 |
0.12 |
x |
x |
0.154 |
x |
x |
0.25 |
x |
0.344 |
|
2.1/2" |
65 |
2.875 |
0.083 |
0.12 |
x |
x |
0.203 |
x |
x |
0.3 |
x |
0.375 |
|
3" |
80 |
3.5 |
0.083 |
0.12 |
x |
x |
0.216 |
x |
x |
0.35 |
x |
0.438 |
|
4" |
100 |
4.5 |
0.083 |
0.12 |
x |
x |
0.237 |
x |
x |
0.437 |
x |
0.531 |
|
5" |
125 |
5.563 |
0.109 |
0.12 |
x |
x |
0.258 |
x |
x |
0.5 |
x |
0.625 |
|
6" |
150 |
6.625 |
0.109 |
0.13 |
x |
x |
0.28 |
x |
x |
0.562 |
x |
0.719 |
|
8" |
200 |
8.625 |
0.109 |
0.15 |
0.25 |
0.277 |
0.322 |
0.406 |
0.593 |
0.718 |
0.812 |
0.906 |
|
10" |
250 |
10.75 |
0.134 |
0.17 |
0.25 |
0.307 |
0.365 |
0.5 |
0.718 |
0.843 |
1.0 |
1.125 |
|
12" |
300 |
12.75 |
0.165 |
0.18 |
0.25 |
0.33 |
0.406 |
0.5 |
0.843 |
1.0 |
1.125 |
1.312 |
mm
|
NB |
DN |
OD (mm) |
Pipe Schedule |
|
SCH 5 |
SCH 10 |
SCH
20 |
SCH 30 |
SCH 40 |
SCH 60 |
SCH 80 |
SCH 100 |
SCH 120 |
SCH 160 |
|
3/4" |
20 |
26.67 |
1.65 |
2.11 |
x |
2.41 |
2.87 |
x |
3.91 |
x |
4.32 |
5.56 |
|
1" |
25 |
33.40 |
1.65 |
2.77 |
x |
2.90 |
3.38 |
x |
4.55 |
x |
5.08 |
6.35 |
|
1.1/2" |
40 |
48.26 |
1.65 |
2.77 |
x |
3.18 |
3.68 |
x |
5.08 |
x |
5.72 |
7.14 |
|
2" |
50 |
60.32 |
1.65 |
2.77 |
x |
x |
3.91 |
x |
5.54 |
x |
6.35 |
8.74 |
|
2.1/2" |
65 |
73.02 |
2.11 |
3.05 |
x |
x |
5.16 |
x |
7.01 |
x |
7.62 |
9.53 |
|
3" |
80 |
88.9 |
2.11 |
3.05 |
x |
x |
5.49 |
x |
7.62 |
x |
8.89 |
11.13 |
|
4" |
100 |
114.3 |
2.11 |
3.05 |
x |
x |
6.02 |
x |
8.56 |
x |
11.10 |
13.49 |
|
5" |
125 |
141.3 |
5.77 |
3.4 |
x |
x |
6.55 |
x |
9.53 |
x |
12.70 |
15.88 |
|
6" |
150 |
168.27 |
2.77 |
3.4 |
x |
x |
7.11 |
x |
10.97 |
x |
14.27 |
18.26 |
|
8" |
200 |
219.07 |
2.77 |
3.76 |
6.35 |
7.04 |
8.18 |
12.7 |
12.70 |
15.06 |
18.24 |
23.01 |
|
10" |
250 |
273.05 |
3.4 |
4.19 |
6.35 |
7.8 |
9.27 |
12.7 |
15.06 |
18.24 |
21.41 |
28.58 |
|
12" |
300 |
323.85 |
4.19 |
4.57 |
6.35 |
8.38 |
10.31 |
12.7 |
17.45 |
21.41 |
25.40 |
33.32 |