球墨铸铁管法兰厚度
规格DN
mm
PN10
PN16
PN25
10
15
20
25
32
40
19
50
65
80
100
125
150
200
22
250
24.5
300
27.5
350
26.5
30
400
28
450
25.5
34.5
500
31.5
36.5
600
36
42
700
32.5
39.5
46.5
800
35
43
51
900
37.5
55.5
1000
60
1200
45
57
69
1400
46
74
1600
49
81
1800
52
70
88
2000
55
75
95
