公称外径
|
最小平均外径
|
最大平均外径
|
|
等级A
|
等级B
|
||
16
|
16.0
|
16.3
|
16.3
|
20
|
20.0
|
20.3
|
20.3
|
25
|
25.0
|
25.3
|
25.3
|
32
|
32.0
|
32.3
|
32.3
|
40
|
40.0
|
40.0
|
40.3
|
50
|
50.0
|
50.5
|
50.3
|
63
|
63.0
|
63.6
|
63.4
|
75
|
75.0
|
75.7
|
75.5
|
90
|
90.0
|
90.9
|
90.6
|
110
|
110.0
|
111.0
|
110.7
|
125
|
125.0
|
126.2
|
125.8
|
140
|
140.0
|
141.3
|
140.9
|
160
|
160.0
|
161.5
|
161.0
|
180
|
180.0
|
181.7
|
181.1
|
200
|
200.0
|
201.8
|
201.2
|
225
|
225.0
|
227.1
|
226.4
|
250
|
250.0
|
252.3
|
251.5
|
280
|
280.0
|
282.6
|
281.7
|
315
|
315.0
|
317.9
|
316.9
|
355
|
355.0
|
358.2
|
357.2
|
400
|
400.0
|
403.6
|
402.4
|
450
|
450.0
|
454.1
|
452.7
|
500
|
500.0
|
504.5
|
503.0
|
560
|
560.0
|
565.0
|
563.4
|
630
|
630.0
|
635.7
|
633.8
|
710
|
710.0
|
716.4
|
714.0
|
800
|
800.0
|
807.2
|
804.2
|
900
|
900.0
|
908.1
|
904.0
|
1000
|
1000.0
|
1009.0
|
1004.0
|