Basic Dimensions of American Standard Taper Pipe Threads
For all dimensions see corresponding reference letters in table. Angle between sides of thread is 60 degrees. Taper of thread on diameter is ¾ inches per foot. Angle of taper with centerline is 1° 47’ 24” (1.7899°). The basic maximum thread height, h of the truncated thread is 0.8 x (pitch of thread). The crest and root are truncated a minimum of 0.033 x (pitch) for all pitches.
|
Nominal Pipe Size |
Outside Diameter of Pipe, |
Threads per Inch, |
Pitch of Thread, |
Pitch Dia, at Beginning of External Thread, |
Handtight Engagement Length", Diameter, |
Handtight Engagement Length", Diameter, |
||
|
1/16 |
0.3125 |
27 |
0.03704 |
0.27118 |
0.160 |
0.28118 |
0.2611 |
0.28750 |
|
1/8 |
0.405 |
27 |
0.03704 |
0.36351 |
0.1615 |
0.37360 |
0.2639 |
0.38000 |
|
1/4 |
0.540 |
18 |
0.05556 |
0.47739 |
0.2278 |
0.49163 |
0.4018 |
0.50250 |
|
3/8 |
0.675 |
18 |
0.05556 |
0.61201 |
0.240 |
0.62701 |
0.4078 |
0.63750 |
|
1/2 |
0.840 |
14 |
0.07143 |
0.75843 |
0.320 |
0.77843 |
0.5337 |
0.79179 |
|
3/4 |
1.050 |
14 |
0.07143 |
0.96768 |
0.339 |
0.98887 |
0.5457 |
1.00179 |
|
1 |
1.315 |
11.5 |
0.08696 |
1.21363 |
0.400 |
1.23863 |
0.6828 |
1.25630 |
|
1-1/4 |
1.660 |
11.5 |
0.08696 |
1.55713 |
0.420 |
1.58338 |
0.7068 |
1.60130 |
|
1-1/2 |
1.900 |
11.5 |
0.08696 |
1.79609 |
0.420 |
1.82234 |
0.7235 |
1.84130 |
|
2 |
2.375 |
11.5 |
0.08696 |
2.26902 |
0.436 |
2.29627 |
0.7565 |
2.31630 |
|
2-1/2 |
2.875 |
8 |
0.12500 |
2.71953 |
0.682 |
2.76216 |
1.1375 |
2.79062 |
|
3 |
3.5 |
8 |
0.12500 |
3.34062 |
0.766 |
3.38850 |
1.2000 |
3.41562 |
|
3-1/2 |
4 |
8 |
0.12500 |
3.83750 |
0.821 |
3.88881 |
1.2500 |
3.91562 |
|
4 |
4.5 |
8 |
0.12500 |
4.33438 |
0.844 |
4.38712 |
1.3000 |
4.41562 |
|
5 |
5.563 |
8 |
0.12500 |
5.39073 |
0.937 |
5.44929 |
1.4063 |
5.47862 |
|
6 |
6.625 |
8 |
0.12500 |
6.44609 |
0.958 |
6.50597 |
1.5125 |
6.54062 |
|
8 |
8.625 |
8 |
0.12500 |
8.43359 |
1.063 |
8.50003 |
1.7125 |
8.54062 |
|
10 |
10.750 |
8 |
0.12500 |
10.54531 |
1.210 |
10.62094 |
1.9250 |
10.66562 |
|
12 |
12.750 |
8 |
0.12500 |
12.53281 |
1.360 |
12.61781 |
2.1250 |
12.66562 |
H1: Dimensions of American Standard Pipe Sizes
|
Nominal Size |
Schedule Number |
Outside Diameter |
Inside Diameter |
Wall Thickness |
Inside Area |
Weight Per Ft. |
Metal Area |
|
1/8 |
40 |
0.405 |
0.269 |
0.068 |
0.057 |
0.245 |
0.072 |
|
80 |
0.405 |
0.215 |
0.095 |
0.036 |
0.315 |
0.093 |
|
|
1/4 |
40 |
0.540 |
0.364 |
0.088 |
0.104 |
0.425 |
0.125 |
|
80 |
0.540 |
0.302 |
0.119 |
0.072 |
0.535 |
0.157 |
|
|
3/8 |
40 |
0.675 |
0.493 |
0.091 |
0.191 |
0.568 |
0.167 |
|
80 |
0.675 |
0.423 |
0.126 |
0.141 |
0.739 |
0.217 |
|
|
1/2 |
40 |
0.840 |
0.622 |
0.109 |
0.304 |
0.851 |
0.250 |
|
80 |
0.840 |
0.546 |
0.147 |
0.234 |
1.088 |
0.320 |
|
|
3/4 |
40 |
1.050 |
0.824 |
0.113 |
0.533 |
1.131 |
0.333 |
|
80 |
1.050 |
0.742 |
0.154 |
0.432 |
1.474 |
0.433 |
|
|
1 |
40 |
1.315 |
1.049 |
0.133 |
0.864 |
1.679 |
0.494 |
|
80 |
1.315 |
0.957 |
0.179 |
0.719 |
2.172 |
0.639 |
|
|
1-1/4 |
40 |
1.660 |
1.380 |
0.140 |
1.496 |
2.273 |
0.668 |
|
80 |
1.660 |
1.278 |
0.191 |
1.283 |
2.996 |
0.881 |
|
|
1-1/2 |
40 |
1.900 |
1.610 |
0.145 |
2.036 |
2.718 |
0.799 |
|
80 |
1.900 |
1.500 |
0.200 |
1.767 |
3.631 |
1.068 |
|
|
2 |
40 |
2.375 |
2.067 |
0.154 |
3.356 |
3.653 |
1.074 |
|
80 |
2.375 |
1.939 |
0.218 |
2.953 |
5.022 |
1.477 |
|
|
2-1/2 |
40 |
2.875 |
2.469 |
0.203 |
4.788 |
5.792 |
1.704 |
|
80 |
2.875 |
2.323 |
0.276 |
4.238 |
7.660 |
2.253 |
|
|
3 |
40 |
3.500 |
3.068 |
0.216 |
7.393 |
7.575 |
2.228 |
|
80 |
3.500 |
2.900 |
0.300 |
6.605 |
10.252 |
3.016 |
|
|
3-1/2 |
40 |
4.000 |
3.548 |
0.226 |
9.887 |
9.108 |
2.679 |
|
80 |
4.000 |
3.364 |
0.318 |
8.888 |
12.504 |
3.678 |
|
|
4 |
40 |
4.500 |
4.026 |
0.237 |
12.730 |
10.789 |
3.174 |
|
80 |
4.500 |
3.826 |
0.337 |
11.497 |
14.982 |
4.407 |
|
|
5 |
40 |
5.563 |
5.047 |
0.258 |
20.006 |
14.615 |
4.299 |
|
80 |
5.563 |
4.813 |
0.375 |
18.194 |
20.776 |
6.111 |
|
|
6 |
40 |
6.625 |
6.065 |
0.280 |
28.890 |
18.971 |
5.580 |
|
80 |
6.625 |
5.761 |
0.432 |
26.607 |
28.570 |
8.404 |
|
|
8 |
40 |
8.625 |
7.981 |
0.322 |
50.027 |
28.548 |
8.397 |
|
80 |
8.625 |
7.625 |
0.500 |
45.664 |
43.382 |
12.761 |
|
|
10 |
40 |
10.750 |
10.020 |
0.365 |
78.854 |
40.474 |
11.905 |
|
80 |
10.750 |
9.750 |
0.500 |
74.662 |
54.726 |
16.098 |
|
|
12 |
40 |
12.750 |
11.938 |
0.406 |
111.932 |
53.512 |
15.741 |
|
80 |
12.750 |
11.750 |
0.500 |
108.434 |
65.402 |
19.238 |
Thread forms of Various Pipe Threads
American Standard Taper Pipe
British Standard Taper Pipe
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