In context, this word refers to the wall thickness of the pipe. Than the parameter, the higher and wall thickness. For example, a 2-inch nominal size steel pipe: schedule 40 has a wall thickness of 0.154 inches and schedule 80 has a wall thickness of 0.218 inches. The word schedule in the English language is highly polysemous, and can be translated also as «Range of pipes.» However, in English literature of the schedule is linked also with the complex physico-mechanical characteristics of the material of the pipe. Specifically, the parameter responsible for the value of the maximum mechanical stress that can occur in the pipe when pumping a specific working environment, and which do not affect its performance.
Thus, for full compliance refer to traditional domestic internal diameter of the pipe and/or wall thickness is required at the same time knowing and operating conditions of the pipe. The meaning of the word schedule more in line with the technical term «gradation» and not «size» as it defines also the size of the pipeline.
To buy at cost-effective prices from the manufacturer of the pipe of foreign manufacture of any brand and cross-sectional dimensions of the CMH offers. Supplier guaranteed expeditious shipment of tubular metal at any point, set by the client.
How to translate the number of Sch in mm
The operation can be performed in two ways — calculated and tabulated. In the first case, you calculate a gradation Sch, using the formula Sch = 1000P/S, where p is the internal pressure of the working fluid in the pipe in pounds per square inch, S is the allowable working stress in pounds. The calculation, however, will not be very accurate since the pressure in the working pipe is constant. Thus, simply, directly proportional to the ratio between the Sch and mm no. In addition, the calculation is extremely difficult to account for the tolerances on the wall thickness of the pipe, which are laid by the manufacturers.
Therefore, the most accurate domestic equivalent of the concept is the original thickness of the pipe wall, i.e. if the user specified that the pipe is made from Sch 40/20/80 pipe, then the closest translation would be the expression «product, which is made of a standard/thin-walled/thick-walled pipes.»
When a tabular method of determining the compliance you can use the following information:
Nominal diameter (nominal) |
Schedule |
Outer diameter — D — (mm) |
Wall thickness — t — (mm) |
Inner diameter — d — (mm) |
The passage (a sectional area at the inner diameter) (cm2) |
Pipe Weight (kg/m) |
Water Weight (kg/m) |
(inches) |
(mm) |
1/8 |
3 |
10S |
|
10.3 |
1.245 |
7.811 |
0.479 |
0.277 |
0.048 |
Std |
40 |
1.727 |
6.846 |
0.368 |
0.364 |
0.037 |
XS |
80 |
2.413 |
5.474 |
0.235 |
0.468 |
0.024 |
¼ |
6 |
10S |
|
13.7 |
1.651 |
10.398 |
0.846 |
0.489 |
0.085 |
Std |
40 |
2.235 |
9.23 |
0.669 |
0.630 inch |
0.067 |
XS |
80 |
3.023 |
7.654 |
0.460 |
0.794 |
0.046 |
3/8 |
10 |
10S |
|
17.145 |
1.651 |
13.843 |
1.505 |
0.629 |
0.151 |
Std |
40 |
2.311 |
12.523 |
1.232 |
0.843 |
0.123 |
XS |
80 |
3.2 |
10.745 |
0.907 |
1.098 |
0.091 |
½ |
15 |
5S |
|
21.336 |
1.651 |
18.034 |
2.554 |
0.799 |
0.255 |
10S |
|
2.108 |
17.12 |
2.302 |
0.997 |
0.230 |
Std |
40 |
2.769 billion |
15.798 |
1.960 |
1.265 |
0.190 |
XS |
80 |
3.734 |
13.868 |
1.510 |
1.617 |
0.151 |
|
160 |
4.75 |
11.836 |
1.100 |
1.938 |
0.110 |
XXS |
|
7.468 |
6.4 |
0.322 |
2.247 |
0.032 |
¾ |
20 |
5S |
|
26.67 |
1.651 |
23.368 |
4.289 |
1.016 |
0.429 |
10S |
|
2.108 |
22.454 |
3.960 |
1.273 |
0.396 |
Std |
40 |
2.87 |
20.93 |
3.441 |
1.680 |
0.344 |
XS |
80 |
3.912 |
18.846 |
2.790 |
2.190 |
0.279 |
|
160 |
5.537 |
15.596 |
1.910 |
2.878 |
0.191 |
XXS |
|
7.823 |
11.024 |
0.954 |
3.626 |
0.095 |
1 |
25 |
5S |
|
33.401 |
1.651 |
30.099 |
7.115 |
1.289 |
0.712 |
10S |
|
2.769 billion |
27.863 |
6.097 |
2.086 |
0.610 |
Std |
40 |
3.378 |
26.645 |
5.576 |
2.494 |
0.558 |
XS |
80 |
4.547 |
24.307 |
4.640 |
3.227 |
0.464 |
|
160 |
6.35 |
20.701 |
3.366 |
4.225 |
0.337 |
XXS |
|
9.093 |
15.215 |
1.818 |
5.436 |
0.182 |
1 ¼ |
32 |
5S |
|
42.164 |
1.651 |
38.862 |
11.862 |
1.645 |
1.186 |
10S |
|
2.769 billion |
36.626 |
10.536 |
2.683 |
1.054 |
Std |
40 |
3.556 |
35.052 |
9.650 |
3.377 |
0.965 |
XS |
80 |
4.851 |
32.462 |
8.276 |
4.452 |
0.828 |
|
160 |
6.35 |
29.464 |
6.818 |
5.594 |
0.682 |
XXS |
|
9.703 |
22.758 |
4.068 |
7.747 |
0.407 |
1 ½ |
40 |
5S |
|
48.26 |
1.651 |
44.958 |
15.875 |
1.893 |
1.587 |
10S |
|
2.769 billion |
42.722 |
14.335 |
3.098 |
1.433 |
Std |
40 |
3.683 |
40.894 |
13.134 |
4.038 |
1.313 |
XS |
80 |
5.08 |
38.1 |
11.401 |
5.395 |
1.140 |
|
160 |
7.137 |
33.986 |
9.072 |
7.219 |
0.907 |
XXS |
|
10.16 |
27.94 |
6.131 |
9.521 |
0.613 |
|
|
13.335 |
21.59 |
3.661 |
11.455 |
0.366 |
|
|
15.875 |
16.51 |
2.141 |
12.645 |
0.214 |
2 |
50 |
5S |
|
60.325 |
1.651 |
57.023 |
25.538 |
2.383 |
2.554 |
10S |
|
2.769 billion |
54.787 |
23.575 |
3.920 |
2.357 |
Std |
40 |
3.912 |
52.501 |
21.648 |
5.428 |
2.165 |
XS |
80 |
5.537 |
49.251 |
19.051 |
7.461 |
1.905 |
|
160 |
8.712 |
42.901 |
14.455 |
11.059 |
1.446 |
XXS |
|
11.074 |
38.177 |
11.447 |
13.415 |
1.145 |
|
|
14.275 |
31.775 |
7.930 |
16.168 |
0.793 |
|
|
17.45 |
25.425 |
5.077 |
18.402 |
0.508 |
2 ½ |
65 |
5S |
|
73.025 |
2.108 |
68.809 |
37.186 |
3.677 |
3.719 |
10S |
|
3.048 |
66.929 |
35.182 |
5.246 |
3.518 |
Std |
40 |
5.156 |
62.713 |
30.889 |
8.607 |
3.089 |
XS |
80 |
7.01 |
59.005 |
27.344 |
11.382 |
2.734 |
|
160 |
9.525 |
53.975 |
22.881 |
14.876 |
2.288 |
XXS |
|
14.021 |
44.983 |
15.892 |
20.348 |
1.589 |
|
|
17.145 |
38.735 |
11.784 |
23.564 |
1.178 |
|
|
20.32 |
32.385 |
8.237 |
26.341 |
0.824 |
3 |
80 |
5S |
|
88.9 |
2.108 |
84.684 |
56.324 |
4.5 |
5.632 |
10S |
|
3.048 |
82.804 |
53.851 |
6.436 |
5.385 |
Std |
40 |
5.486 |
77.928 |
47.696 |
11.255 |
4.770 |
XS |
80 |
7.62 |
A 73.66 |
42.614 |
15.233 |
4.261 |
|
160 |
11.1 |
66.7 |
34.942 |
21.240 |
3.494 |
XXS |
|
15.24 |
58.42 |
26.805 |
27.610 |
2.680 |
|
|
18.415 |
52.07 |
21.294 |
31.925 |
2.129 |
|
|
21.59 |
45.72 |
16.417 |
35.743 |
1.642 |
3 ½ |
90 |
5S |
|
101.6 |
2.108 |
97.384 |
74.485 |
5.158 |
7.448 |
10S |
40 |
3.048 |
95.504 |
71.636 |
7.388 |
7.164 |
Std |
80 |
5.74 |
90.12 |
63.787 |
13.533 |
6.379 |
XS |
|
8.077 |
85.446 |
57.342 |
18.579 |
5.734 |
XXS |
|
16.154 |
69.292 |
37.710 |
33.949 |
3.771 |
4 |
100 |
5S |
|
114.3 |
2.108 |
110.084 |
95.179 |
5.817 |
9.518 |
10S |
|
3.048 |
108.204 |
91.955 |
8.340 |
9.196 |
|
|
4.775 |
104.75 |
86.179 |
12.863 |
8.618 |
Std |
40 |
6.02 |
102.26 |
82.130 |
16.033 |
8.213 |
XS |
80 |
8.56 |
97.18 |
74.173 |
22.262 |
7.417 |
|
120 |
11.1 |
92.1 |
66.621 |
28.175 |
6.662 |
|
|
12.7 |
88.9 |
62.072 |
31.736 |
6.207 |
|
160 |
13.487 |
87.326 |
59.893 |
33.442 |
5.989 |
XXS |
|
17.12 |
80.06 |
50.341 |
40.920 |
5.034 |
|
|
20.32 |
A 73.66 |
42.614 |
46.970 |
4.261 |
|
|
23.495 |
67.31 |
35.584 |
52.474 |
3.558 |
5 |
125 |
5S |
|
141.3 |
2.769 billion |
135.762 |
144.76 |
9.435 |
14.476 |
10S |
|
3.404 |
134.492 |
142.06 |
11.545 |
14.206 |
Std |
40 |
6.553 |
128.194 |
129.07 |
21.718 |
12.907 |
XS |
80 |
9.525 |
122.25 |
117.38 |
30.871 |
11.738 |
|
120 |
12.7 |
115.9 |
105.50 |
40.170 |
10.550 |
|
160 |
15.875 |
109.55 |
94.254 |
48.973 |
9.426 |
XXS |
|
19.05 |
103.2 |
83.647 |
57.280 |
8.365 |
|
|
22.225 |
96.85 |
73.670 |
65.091 |
7.367 |
|
|
25.4 |
90.5 |
64.326 |
72.406 |
6.433 |
6 |
150 |
5S |
|
168.275 |
2.769 billion |
162.737 |
208.00 |
11.272 |
20.800 |
10S |
|
3.404 |
161.467 |
204.77 |
13.804 |
20.477 |
|
|
5.563 |
157.149 |
193.96 |
22.263 |
19.396 |
Std |
40 |
7.112 |
154.051 |
186.39 |
28.191 |
18.639 |
XS |
80 |
10.973 |
146.329 |
168.17 |
42.454 |
16.817 |
|
120 |
14.275 |
139.725 |
153.33 |
54.070 |
15.333 |
|
160 |
18.237 |
131.801 |
136.44 |
67.300 |
13.644 |
XXS |
|
21.946 |
124.383 |
121.51 |
78.985 |
12.151 |
|
|
25.4 |
117.475 |
108.39 |
89.258 |
10.839 |
|
|
28.575 |
111.125 |
96.987 |
98.184 |
9.699 |
8 |
200 |
5S |
|
219.075 |
2.769 billion |
213.537 |
358.13 |
14.732 |
35.813 |
10S |
|
3.759 |
211.557 |
351.52 |
19.907 |
35.152 |
|
|
5.563 |
207.949 |
339.63 |
29.217 |
33.963 |
|
20 |
6.35 |
206.375 |
334.51 |
33.224 |
33.451 |
|
30 |
7.036 |
205.003 |
330.07 |
36.694 |
33.007 |
Std |
40 |
8.179 |
202.717 |
322.75 |
42.425 |
32.275 |
|
60 |
10.312 |
198.451 |
309.31 |
52.949 |
30.931 |
XS |
80 |
12.7 |
193.675 |
294.60 |
64.464 |
29.460 |
|
100 |
15.062 |
188.951 |
280.41 |
75.578 |
28.041 |
|
120 |
18.237 |
182.601 |
261.88 |
90.086 |
26.188 |
|
140 |
20.625 |
177.825 |
248.36 |
100.671 |
24.836 |
|
160 |
23.012 |
173.051 |
235.20 |
110.970 |
23.520 |
|
|
25.4 |
168.275 |
222.40 |
120.994 |
22.240 |
|
|
28.575 |
161.925 |
205.93 |
133.887 |
20.593 |
|
|