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Class400LB asme钢制管法兰结构图及其法兰连接尺寸均如下所示：
DN D K d n-L C 螺栓直径 双头螺栓长度 凸面6.4mm 环连接 15 95 66.7 35 4-16 15 M14 75 75 20 120 82.5 43 4-19 16 M16 90 90 25 125 88.9 51 4-19 18 M16 90 90 32 135 98.4 64 4-19 21 M16 95 95 40 155 114.3 73 4-22 22.5 M20 110 110 50 165 127.0 92 8-19 25.5 M16 110 110 65 190 149.2 105 8-22 29 M20 120 120 80 210 168.3 127 8-22 32 M20 125 125 100 255 200.0 157 8-26 35 M24 140 140 125 280 234.9 186 8-26 38.5 M24 145 145 150 320 269.9 216 12-26 41.5 M24 150 150 200 380 330.2 270 12-29 48 M27 170 170 250 445 387.3 324 16-32 54 M30 190 190 300 520 450.8 381 16-35 57.5 M33 205 205 350 585 514.3 413 20-35 60.5 M33 210 210 400 650 571.5 470 20-39 63.5 M36×3 220 220 450 710 628.0 533 24-39 67 M36×3 230 230 500 775 685.8 584 24-42 70 M39×3 240 250 600 915 812.8 682 24-48 76.5 M45×3 265 280 650 972 876.3 749 28-48 89 M45×3 300 320 700 1035 940 800 28-51 95.5 M48×3 320 340 750 1092 997 857 28-55 102 M52×3 340 360 800 1149 1054.1 914 28-55 108 M52×3 355 375 850 1207 1105 965 28-55 115.5 M52×3 365 385 900 1270 1168.4 1022 32-55 114.5 M52×3 370 390 950 1207 1118 1035 32-48 124 M48×3 370 / 1000 1270 1175 1092 32-51 130 M48×3 385 / 1050 1321 1226 1143 32-51 133.5 M48×3 395 / 1100 1384 1283 1200 32-55 134 M52×3 405 / 1150 1441 1340 1257 36-55 145 M52×3 425 / 1200 1511 1403.3 1308 28-60 152.5 M56×3 450 / 1250 1568 1461 1362 32-60 157.5 M56×3 460 / 1300 1619 1511.3 1413 32-60 162 M56×3 470 / 1350 1702 1581.1 1470 28-67 170 M64×3 500 / 1400 1753 1632 1527 32-67 175 M64×3 510 / 1450 1803 1683 1578 32-67 178 M64×3 515 / 1500 1886 1753 1635 32-73 186 M70×3 545 /