挡脚板现场尺寸计算
挡脚板中心距大约为127~160mm，依据现场需要包围物质的外径来计算需要多少数量挡脚板，当然这个尺寸和数量只是一个大概的理论计算，实际现场需要多少数量的挡脚板，还是需要依据现场情况开决定的。
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| 挡脚板Z5-J | 挡脚板Z5-L |
挡脚板现场尺寸计算
| 挡脚板数量（个） | 圆的直径(mm) | 包围的周长(mm) |
| 4 | 89 | 280 |
| 5 | 135 | 424 |
| 6 | 180 | 565 |
| 7 | 224 | 703 |
| 8 | 267 | 838 |
| 9 | 310 | 973 |
| 10 | 350 | 1100 |
| 11 | 394 | 1238 |
| 12 | 434 | 1362 |
| 13 | 475 | 1492 |
| 14 | 518 | 1627 |
| 15 | 559 | 1755 |
称管子尺寸(NPS)/in |
0.25 |
0.5 |
0.75 |
1.0 |
1.25 |
1.5 |
2.0 |
2.5 |
3.0 |
4.0 |
6.0 |
公称直径(DN)/mm |
6 |
15 |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
150 |
公称管子尺寸(NPS)/in |
8.0 |
10.0 |
12.0 |
14.0 |
16.0 |
18.0 |
20.0 |
24.0 |
36.0 |
42.0 |
48.0 |
公称直径(DN)/mm |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
600 |
900 |
1000 |
1200 |
管子规格及有关数据
公称直径 |
英 寸 |
外 径 |
近似内径 |
壁 厚 |
相当于无缝管 |
普厚/加厚 |
|||||
mm |
＂ |
mm |
mm |
mm |
mm |
15 |
4分 |
21.25 |
15 |
2.75/3.25 |
22 |
20 |
6分 |
26.75 |
20 |
2.75/3.5 |
25 |
25 |
1寸 |
33.5 |
25 |
3.25/4 |
32 |
32 |
1.2寸 |
42.25 |
32 |
3.25/4 |
38 |
40 |
1.5寸 |
48 |
40 |
3.5/4.25 |
45 |
50 |
2寸 |
60 |
50 |
3.5/4.5 |
57 |
70 |
2.5寸 |
75.5 |
70 |
3.75/4.5 |
76 |
80 |
3 |
88.5 |
80 |
4/4.75 |
89 |
100 |
4 |
114 |
106 |
4/5.0 |
108 |
125 |
5 |
140 |
131 |
5/5.5 |
133 |
150 |
6 |
165 |
156 |
5/5.5 |
159 |
200 |
8 |
219 |
207 |
6 |
219 |
250 |
10 |
273 |
259 |
7 |
273 |
300 |
12 |
325 |
309 |
8 |
435 |
350 |
14 |
377 |
9 |
485 |
|
400 |
16 |
426 |
9 |
535 |
|
450 |
18 |
478 |
9 |
590 |
|
500 |
20 |
529 |
9 |
640 |
|
600 |
24 |
630 |
10 |
755 |
|
700 |
28 |
720 |
10 |
860 |
|
800 |
32 |
820 |
975 |
国际管道对照表
N.D |
INCH |
STANDARD |
METRIC |
INCH |
COPPER |
PVC |
PE |
DUCTILE |
15A |
1/2" |
21.7 |
20 |
21.5-22.0 |
22 |
|||
20A |
3/4" |
27.2/28.5 |
26 |
27.0-27.6 |
26 |
|||
25A |
1" |
34.0 |
30 |
28.24 |
30 |
32 |
34.0-34.7 |
34 |
32A |
1-1/4" |
42.7 |
38 |
34.59 |
35 |
38 |
42.0-42.8 |
48 |
40A |
1-1/2" |
48.6 |
44.5 |
40.95 |
45 |
48 |
48.0-48.9 |
60 |
50A |
2" |
60.6 |
57.0 |
54.05 |
55 |
60 |
60.0-61.1 |
76 |
65A |
2-1/2" |
76.3 |
76.1 |
66.75 |
70 |
76 |
76.0-77.3 |
89 |
80A |
3" |
89.1 |
88.9 |
79.85 |
85 |
89 |
89.0-90.5 |
98 |
90A |
3-1/2" |
101.6 |
||||||
100A |
4" |
114.3 |
108.0 |
106.27 |
110 |
114 |
114.0-115.9 |
118 |
125A |
5" |
139.8 |
133.0 |
131.67 |
140 |
140 |
140.0-142.3 |
144 |
150A |
6" |
165.2 |
159.0 |
157.68 |
160 |
165 |
165.0-167.6 |
170 |
200A |
8" |
216.3 |
219.0 |
208.48 |
216 |
216.0-218.8 |
222 |
|
250A |
10" |
267.4 |
267.0 |
260.50 |
267 |
267.0-270.1 |
274 |
|
300A |
12" |
318.5 |
323.9 |
312.11 |
318 |
318.0-321.3 |
326 |
|
350A |
14" |
355.6 |
368.0 |
363.72 |
378 |
|||
400A |
16" |
406.4 |
419.0 |
414.52 |
429 |
|||
450A |
18" |
457.2 |
457.2 |
465.32 |
480 |
|||
500A |
20" |
508.0 |
508.0 |
516.94 |
532 |
|||
550A |
22" |
558.8 |
558.0 |
567.74 |
||||
600A |
24" |
609.6 |
619.0 |
619.35 |
635 |
|||
650A |
26" |
660.4 |
||||||
700A |
28" |
711.2 |
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