石油、石化及相关工业用钢制截止阀和升降式止回阀、阀体的最小壁厚
公称尺寸 DN | 公 称 压 力 PN | |||||||||
| 16 | 20 | 25 | 40 | 50 | 63、64 | 100、110 | 150、160 | 250、260 | 420 | |
| 阀 体 最 小 壁 厚/mm | ||||||||||
| 15 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 7.7 | 9.5 | 11.1 |
| 20 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.5 | 7.1 | 8.9 | 11.1 | 13.5 |
| 25 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.7 | 7.9 | 9.5 | 12.7 | 15.1 |
| 32 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 7.0 | 8.7 | 10.5 | 14.2 | 17.5 |
| 40 | 6.3 | 6.3 | 6.7 | 7.4 | 7.9 | 8.4 | 9.5 | 11.3 | 15.0 | 19.0 |
| 50 | 7.9 | 8.7 | 8.8 | 9.2 | 9.5 | 10.0 | 11.1 | 13.8 | 19.0 | 22.2 |
| 65 | 8.7 | 9.5 | 9.8 | 10.6 | 11.1 | 11.4 | 11.9 | 15.4 | 22.2 | 25.4 |
| 80 | 9.4 | 10.3 | 10.6 | 11.4 | 11.9 | 12.2 | 12.7 | 19.0 | 23.8 | 30.2 |
| 100 | 10.3 | 11.1 | 11.4 | 12.2 | 12.7 | 12.7 | 15.9 | 21.4 | 28.6 | 35.7 |
| 150 | 11.9 | 11.9 | 12.6 | 14.6 | 15.9 | 16.7 | 19.0 | 25.4 | 38.1 | 48.4 |
| 200 | 12.7 | 12.7 | 13.4 | 15.9 | 17.4 | 19.0 | 25.4 | 31.8 | 47.6 | 61.9 |
| 250 | 13.5 | 13.5 | 14.5 | 17.2 | 19.0 | 21.4 | 28.6 | 36.5 | 57.2 | 67.5 |
| 300 | 15.9 | 15.9 | 16.8 | 19.3 | 21.0 | 23.8 | 31.8 | 42.1 | 66.7 | 86.5 |
| 350 | 16.7 | 16.7 | — | — | — | — | — | 46.0 | 69.8 | — |
| 400 | 17.5 | 17.5 | — | — | — | — | — | — | — | — |
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