管の標準寸法
| 呼び径 | 外径 | 呼び厚さ | ||||||
| JIS | ASTM | Sch 5S | Sch 10S | Sch 20S | Sch 40 | Sch 80 | ||
| （A） | （B） | 外径（㎜） | 外径（㎜） | 厚さ（㎜） | 厚さ（㎜） | 厚さ（㎜） | 厚さ（㎜） | 厚さ（㎜） |
| 6 | 1/8 | 10.5 | 10.3 | 1.0 | 1.2 | 1.5 | 1.7 | 2.4 |
| 8 | 1/4 | 13.8 | 13.7 | 1.2 | 1.65 | 2.0 | 2.2 | 3.0 |
| 10 | 3/8 | 17.3 | 17.2 | 1.2 | 1.65 | 2.0 | 2.3 | 3.2 |
| 15 | 1/2 | 21.7 | 21.3 | 1.65 | 2.1 | 2.5 | 2.8 | 3.7 |
| 20 | 3/4 | 27.2 | 26.7 | 1.65 | 2.1 | 2.5 | 2.9 | 3.9 |
| 25 | 1 | 34.0 | 33.4 | 1.65 | 2.8 | 3.0 | 3.4 | 4.5 |
| 32 | 1_1/4 | 42.7 | 42.2 | 1.65 | 2.8 | 3.0 | 3.6 | 4.9 |
| 40 | 1_1/2 | 48.6 | 48.3 | 1.65 | 2.8 | 3.0 | 3.7 | 5.1 |
| 50 | 2 | 60.5 | 60.3 | 1.65 | 2.8 | 3.5 | 3.9 | 5.5 |
| 65 | 2_1/2 | 76.3 | 73.0 | 2.1 | 3.0 | 3.5 | 5.2 | 7.0 |
| 80 | 3 | 89.1 | 88.9 | 2.1 | 3.0 | 4.0 | 5.5 | 7.6 |
| 90 | 3_1/2 | 101.6 | 101.6 | 2.1 | 3.0 | 4.0 | 5.7 | 8.1 |
| 100 | 4 | 114.3 | 114.3 | 2.1 | 3.0 | 4.0 | 6.0 | 8.6 |
| 125 | 5 | 139.8 | 141.3 | 2.8 | 3.4 | 5.0 | 6.6 | 9.5 |
| 150 | 6 | 165.2 | 168.3 | 2.8 | 3.4 | 5.0 | 7.1 | 11.0 |
| 200 | 8 | 216.3 | 219.1 | 2.8 | 4.0 | 6.5 | 8.2 | 12.7 |
| 250 | 10 | 267.4 | 273.1 | 3.4 | 4.0 | 6.5 | 9.3 | 15.1 |
| 300 | 12 | 318.5 | 323.9 | 4.0 | 4.5 | 6.5 | 10.3 | 17.4 |