对焊异径管规格参数表（GB 12459、GB/T 13401）公称通径DN端部外径长度D1D2A系列B系列A系列B系列20×1526.92521.3183825×20
25×1533.7
33.732
3226.9
21.325
1851
5132×25
32×20
32×1542.4
42.4
42.438
38
3833.7
26.9
21.332
25
1851
51
5140×32
40×25
40×20
40×1548.3
48.3
48.3
48.345
45
45
4542.4
33.7
26.7
21.338
32
25
1864
64
64
6450×40
50×32
50×25
50×2060.3
60.3
60.3
60.357
57
57
5748.3
42.4
33.7
26.945
38
32
2576
76
76
7665×50
65×40
65×32
65×2576.1(73)
76.1(73)
76.1(73)
76.1(73)76
76
76
7660.3
48.3
42.4
33.757
45
38
3289
89
89
8980×65
80×50
80×40
80×3288.9
88.9
88.9
88.989
89
89
8976.1(73)
60.3
48.3
42.476
57
45
3889
89
89
8990×80
90×65
90×50
90×40
90×32101.6
101.6
101.6
101.6
101.6
-
-
-
-
-88.9
76.1(73)
60.3
48.3
42.4-
-
-
-
-102
102
102
102
102100×90
100×80
100×65
100×50
100×40114.3
114.3
114.3
114.3
114.3108
108
108
108
108101.6
88.9
76.1(73)
60.3
48.3-
89
76
57
45102
102
102
102
102125×100
125×90
125×80
125×65
125×50139.7
139.7
139.7
139.7
139.7133
-
133
133
133114.3
101.6
88.9
76.1(73)
60.3108
-
89
76
57127
127
127
127
127150×125
150×100
150×90
150×80
150×65168.3
168.3
168.3
168.3
168.3159
159
-
159
159
139.7
114.3
101.6
88.9
76.1(73)133
108
-
89
76140
140
140
140
140200×150
200×125
200×100
200×90219.1
219.1
219.1
219.1219
219
219
-
163.8
139.7
114.3
101.6159
133
108
-152
152
152
152250×200
250×150
250×125
250×100273.0
273.0
273.0
273.0273
273
273
273219.1
168.3
139.7
114.3219
159
133
108178
178
178
178300×250
300×200
300×150
300×125323.9
323.9
323.9
323.9325
325
325
325273.0
219.1
168.3
139.7273
219
159
133203
203
203
203350×300
350×250
350×200
350×150355.6
355.6
355.6
355.6377
377
377
377323.9
273.0
219.1
168.3325
273
219
159
330
330
330
330400×350
400×300
400×250
400×200406.4
406.4
406.4
406.4426
426
426
426355.6
323.9
273.0
219.1377
325
273
219356
356
356
356