|
55°非螺纹密封的管螺纹 (GB/T 7307—2001) mm |
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|
牙 型
|
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|
尺寸 代号 |
每25.4mm 内的牙数 n |
螺距 P |
牙高 h |
圆弧 半径 r≈ |
基 本 直 径 |
外 螺 纹 |
内 螺 纹 |
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|
大径 d=D |
中径 d2=D2 |
小径 d1=D1 |
大径公差Td |
中径公差Td2① |
中径公差 |
小径公差TD1 |
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|
下偏差 |
上偏差 |
下偏差 |
上偏差 |
下偏差 |
上偏差 |
下偏差 |
上偏差 |
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|
A 级 |
B 级 |
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|
1/16 |
28 |
0.907 |
0.581 |
0.125 |
7.723 |
7.142 |
6.561 |
-0.214 |
0 |
-0.107 |
-0.214 |
0 |
0 |
+0.107 |
0 |
+0.282 |
|
1/8 |
28 |
0.907 |
0.581 |
0.125 |
9.728 |
9.147 |
8.566 |
-0.214 |
0 |
-0.107 |
-0.214 |
0 |
0 |
+0.107 |
0 |
+0.282 |
|
1/4 |
19 |
1.337 |
0.856 |
0.184 |
13.157 |
12.301 |
11.445 |
-0.250 |
0 |
-0.125 |
-0.250 |
0 |
0 |
+0.125 |
0 |
+0.445 |
|
3/8 |
19 |
1.337 |
0.856 |
0.184 |
16.662 |
15.806 |
14.950 |
-0.250 |
0 |
-0.125 |
-0.250 |
0 |
0 |
+0.125 |
0 |
+0.445 |
|
1/2 |
14 |
1.814 |
1.162 |
0.249 |
20.955 |
19.793 |
18.631 |
-0.284 |
0 |
-0.142 |
-0.284 |
0 |
0 |
+0.142 |
0 |
+0.541 |
|
5/8 |
14 |
1.814 |
1.162 |
0.249 |
22.911 |
21.749 |
20.587 |
-0.284 |
0 |
-0.142 |
-0.284 |
0 |
0 |
+0.142 |
0 |
+0.541 |
|
3/4 |
14 |
1.814 |
1.162 |
0.249 |
26.441 |
25.279 |
24.117 |
-0.284 |
0 |
-0.142 |
-0.284 |
0 |
0 |
+0.142 |
0 |
+0.541 |
|
7/8 |
14 |
1.814 |
1.162 |
0.249 |
30.201 |
29.039 |
27.877 |
-0.284 |
0 |
-0.142 |
-0.284 |
0 |
0 |
+0.142 |
0 |
+0.541 |
|
1 |
11 |
2.309 |
1.479 |
0.317 |
33.249 |
31.770 |
30.291 |
-0.360 |
0 |
-0.180 |
-0.360 |
0 |
0 |
+0.180 |
0 |
+0.640 |
|
11/8 |
11 |
2.309 |
1.479 |
0.317 |
37.897 |
36.418 |
34.939 |
-0.360 |
0 |
-0.180 |
-0.360 |
0 |
0 |
+0.180 |
0 |
+0.640 |
|
11/4 |
11 |
2.309 |
1.479 |
0.317 |
41.910 |
40.431 |
38.952 |
-0.360 |
0 |
-0.180 |
-0.360 |
0 |
0 |
+0.180 |
0 |
+0.640 |
|
11/2 |
11 |
2.309 |
1.479 |
0.317 |
47.803 |
46.324 |
44.845 |
-0.360 |
0 |
-0.180 |
-0.360 |
0 |
0 |
+0.180 |
0 |
+0.640 |
|
13/4 |
11 |
2.309 |
1.479 |
0.317 |
53.746 |
52.267 |
50.788 |
-0.360 |
0 |
-0.180 |
-0.360 |
0 |
0 |
+0.180 |
0 |
+0.640 |
|
2 |
11 |
2.309 |
1.479 |
0.317 |
59.614 |
58.135 |
56.656 |
-0.360 |
0 |
-0.180 |
-0.360 |
0 |
0 |
+0.180 |
0 |
+0.640 |
|
21/4 |
11 |
2.309 |
1.479 |
0.317 |
65.710 |
64.231 |
62.752 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
21/2 |
11 |
2.309 |
1.479 |
0.317 |
75.184 |
73.705 |
72.226 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
23/4 |
11 |
2.309 |
1.479 |
0.317 |
81.534 |
80.055 |
78.576 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
3 |
11 |
2.309 |
1.479 |
0.317 |
87.884 |
86.405 |
84.926 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
31/2 |
11 |
2.309 |
1.479 |
0.317 |
100.330 |
98.851 |
97.372 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
4 |
11 |
2.309 |
1.479 |
0.317 |
113.030 |
111.551 |
110.072 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
41/2 |
11 |
2.309 |
1.479 |
0.317 |
125.730 |
124.251 |
122.772 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
5 |
11 |
2.309 |
1.479 |
0.317 |
138.430 |
136.951 |
135.472 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
51/2 |
11 |
2.309 |
1.479 |
0.317 |
151.130 |
149.651 |
148.172 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
6 |
11 |
2.309 |
1.479 |
0.317 |
163.830 |
162.351 |
160.872 |
-0.434 |
0 |
-0.217 |
-0.434 |
0 |
0 |
+0.217 |
0 |
+0.640 |
|
注:本标准适应用于管接头、旋塞、阀门及其附件。 ①对薄壁管件,此公差适用于平均中径,该中径是测量两个互相垂直直径的算术平均值。 |
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