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Outer diameters of pipes conforming to Chinese and American standards corresponding to nominal diameters

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Outer diameters of pipes conforming to Chinese and American standards corresponding to nominal diameters

Nominal diameter A Series American Standard GB Series
15 21.3 18
20 26.9 25
25 33.7 32
32 42.4 38
40 48.3 45
50 60.3 57
65 73 76
80 88.9 89
100 114.3 108
125 141.3 133
150 168.3 159
200 219.1 219
250 273 273
300 323.9 325
350 355.6 377
400 406.4 426
450 457 480
500 508 430
600 610 630
700 711 720
800 813 820
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