管道弯头、三通、管子、法兰、阀门公制与英制尺寸对照表
| 管道元件 | 法兰 |
| 公制(B) | 英制(A) | 公制 | 英制 |
| 公称直径DN | 外径/mm | 英寸 " | 外径 /mm | 公称通径DN | 外径 /mm | 英寸 " |
| PN=2.5MPa | PN=4MPa | PN=6.3MPa | PN=10MPa | PN=16MPa |
| 6 | 10 | 1/8 | 10.29 | | | | | | | 1/8 |
| 8 | 13.5 | 1/4 | 13.72 | | | | | | | 1/4 |
| 10 | 17 | 3/8 | 17.15 | 10 | 90 | 90 | 100 | 100 | 100 | 3/8 |
| 15 | 20 | 1/2 | 21.34 | 15 | 95 | 95 | 105 | 105 | 105 | 1/2 |
| 20 | 25 | 3/4 | 26.67 | 20 | 105 | 105 | 130 | 130 | 130 | 3/4 |
| 25 | 32 | 1 | 33.40 | 25 | 115 | 115 | 140 | 140 | 140 | 1 |
| 32 | 38 | 1-1/4 | 42.16 | 32 | 140 | 140 | 155 | 155 | 155 | 1-1/4 |
| 40 | 45 | 1-1/2 | 48.26 | 40 | 150 | 150 | 170 | 170 | 170 | 1-1/2 |
| 50 | 57 | 2 | 60.33 | 50 | 165 | 165 | 180 | 195 | 195 | 2 |
| 65 | 76 | 2-1/2 | 73.03 | 65 | 185 | 185 | 205 | 220 | 220 | 2-1/2 |
| 80 | | 3 | 88.90 | 80 | 200 | 200 | 215 | 230 | 230 | 3 |
| | | 3-1/2 | 101.60 | | | | | | | |
| 100 | 108 | 4 | 114.30 | 100 | 235 | 235 | 250 | 265 | 265 | 4 |
| 125 | 133 | 5 | 141.30 | 125 | 270 | 270 | 295 | 315 | 315 | 5 |
| 150 | 159 | 6 | 168.28 | 150 | 300 | 300 | 345 | 355 | 355 | 6 |
| 200 | 219 | 8 | 219.08 | 200 | 360 | 375 | 415 | 430 | 430 | 8 |
| 250 | 273 | 10 | 273.05 | 250 | 425 | 450 | 470 | 505 | 515 | 10 |
| 300 | 325 | 12 | 323.85 | 300 | 485 | 515 | 530 | 585 | 585 | 12 |
| 350 | 377 | 14 | 355.60 | 350 | 555 | 580 | 600 | 655 | | 14 |
| 400 | 426 | 16 | 406.40 | 400 | 620 | 660 | 670 | 715 | | 16 |
| 450 | 478 | 18 | 457.20 | 450 | 670 | 685 | | | | 18 |
| 500 | 530 | 20 | 508.00 | 500 | 730 | 755 | | | | 20 |
| 550 | 630 | 22 | 558.80 | 550 | | | | | | 22 |
| 600 | | 24 | 609.60 | 600 | 845 | 0 | | | | 24 |
| 650 | | 26 | | 650 | | | | | | 26 |
| 700 | 720 | 28 | | 700 | 960 | | | | | 28 |
| 750 | | 30 | 762.00 | 750 | | | | | | 30 |
| 800 | 820 | 32 | | 800 | 1085 | | | | | 32 |
| 850 | | 34 | | 850 | | | | | | 34 |
| 900 | 920 | 36 | | 900 | 1185 | | | | | 36 |
| 950 | | 38 | | 950 | | | | | | 38 |
| 1000 | 1020 | 40 | | 1000 | 1320 | | | | | 40 |
| 1050 | | 42 | | 1050 | | | | | | 42 |
| 1100 | 1120 | 44 | | 1100 | | | | | | 44 |
| 1150 | | 46 | | 1150 | | | | | | 46 |
| 1200 | 1220 | 48 | | 1200 | 1530 | | | | | 48 |
| 1250 | | 50 | | 1250 | | | | | | 50 |
| 1300 | | 52 | | 1300 | | | | | | 52 |
| 1350 | | 54 | | 1350 | | | | | | 54 |
| 1400 | | 56 | | 1400 | 1755 | | | | | 56 |
| 1450 | | 58 | | 1450 | | | | | | 58 |
| 1500 | | 60 | | 1500 | | | | | | 60 |
| 1600 | | | | 1600 | 1975 | | | | | |
| 1800 | | 72 | | 1800 | 2195 | | | | | 72 |
| 2000 | | 80 | | 2000 | 2425 | | | | | 80 |
| 2100 | | 84 | | 2100 | | | | | | 84 |
| 2200 | | 88 | | 2200 | | | | | | 88 |
| 2400 | | 96 | | 2400 | | | | | | 96 |
| 备注:1 英寸=25.4 毫米=8 英分=1 ANSI(美制) 1 bar=0.1 MPa=14.5 psi |
| 法兰外径参照平面、突面、凹凸面整体钢制法兰数据编入表中,对于其它种类法兰外径仅供参考。 |
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