阶次/壁厚

1.6mm

1.8 mm

2 mm

2.2 mm

2.4 mm

1

437.71

445.46

452.4

458.91

464.98

2

1248.1

1267.6

1285.3

1301.9

1317.4

3

1407.7

1432.7

1455.1

1475.9

1495.3