GB 12224-89 钢制阀门的设计要求-阀体设计
5设计要求
5.1阀体设计
5.1.1小壁厚系指外表面到内腔触及介质的表面量得的尺寸,其值除符合5.1.3条和5.1.4条的规定外,还应符合表1的规定。
表1 阀体颈部的小壁厚mm
公称压力
PM,Mpa |
公称通径 |
|
6 |
10 |
15 |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
150 |
200 |
1.6 |
3.0 |
3.0 |
3.0 |
3.3 |
4.0 |
4.8 |
4.9 |
5.5 |
5.5 |
5.7 |
6.2 |
6.8 |
7.7 |
2.5 |
3.0 |
3.0 |
3.0 |
3.4 |
4.2 |
4.8 |
4.9 |
5.7 |
5.7 |
6.1 |
6.6 |
7.5 |
8.5 |
4.0 |
3.0 |
3.0 |
3.1 |
3.7 |
4.6 |
4.8 |
5.0 |
6 |
6.2 |
6.7 |
7.3 |
8.7 |
10 |
6.4 |
3.0 |
3.1 |
3.2 |
4.2 |
4.8 |
4.8 |
5.0 |
6.3 |
7.0 |
7.9 |
9.1 |
10.8 |
13.3 |
10 |
3.1 |
3.3 |
3.6 |
4.3 |
438 |
4.8 |
5.7 |
6.3 |
7.2 |
8.1 |
9.4 |
12.5 |
15.7 |
16 |
3.3 |
3.8 |
4.3 |
5.3 |
6.4 |
6.9 |
7.6 |
8.3 |
9.8 |
11.5 |
13.4 |
79.4 |
21.2 |
32 |
4.2 |
5.2 |
6.2 |
7.4 |
8.7 |
10.8 |
12.6 |
14.7 |
18.5 |
22.3 |
26.7 |
39.2 |
51.5 |
公称压力
PM,Mpa |
公称通径 |
250 |
300 |
350 |
400 |
450 |
500 |
700 |
800 |
900 |
1000 |
1.6 |
8.1 |
9.0 |
10.0 |
10.6 |
11.2 |
11.9 |
14.6 |
16.3 |
17.6 |
19.1 |
2.5 |
9.3 |
10.3 |
11.6 |
12.5 |
13.4 |
14.3 |
17.9 |
20.0 |
21.8 |
23.8 |
4.0 |
11.2 |
12.5 |
12.5 |
15.5 |
16.9 |
18.2 |
23.5 |
26.2 |
29.0 |
31.7 |
6.4 |
16.1 |
17.7 |
17.7 |
21.7 |
23.7 |
26.1 |
33.2 |
36.8 |
40.4 |
44.7 |
10 |
19.1 |
22.9 |
22.9 |
29.2 |
32.4 |
36 |
49.2 |
55.7 |
62.2 |
68.8 |
16 |
29.6 |
35.4 |
35.4 |
46.5 |
51.5 |
57 |
79.5 |
90.4 |
101.4 |
112.4 |
32 |
63.5 |
15.7 |
15.7 |
100.3 |
112.3 |
124.6 |
173.3 |
197.7 |
222.1 |
246.1 |
5.1.2内径d是介质通过的小直径,其值不得小于法兰公称通径的90%,不符合本标准的内径应取得用户的同意。
5.1.3阀体颈部
从阀体通道部分的外壁开始计算,在1.1√dtm 了范围内的阀体颈部的小壁厚的,11,应符合5.1.1条和5.1.2条的要求。内径为d'的阀体颈部在1.1√dtm