ASME B16.47 Series A/MSS SP-44 Class 900 WN

Norminal Pipe Size O.D.of Flange, O Min.Thick-ness of WN Flange, tf Lenth Through Hub, Y Diam. of Hub, X Hub Diam. Top, A Raised Fase Diam., R Bore (XS) Diam of Bolt Circle No.of Bolt Holes Diam.of Bolt Hole Min.Fillet Radius, r1 Approxi-mate Weight kgs
26 1085 139.7 286 775 660.4 749 635.0 952.5 20 73.0 11 683.01
28 1170 142.9 298 832 711.2 800 685.8 1022.4 20 79.4 13 808.16
30 1230 149.3 311 889 762.0 857 736.6 1085.8 20 79.4 13 924.60
32 1315 158.8 330 946 812.8 914 787.4 1155.7 20 85.7 13 1114.09
34 1395 165.1 349 1006 863.6 965 838.2 1225.6 20 92.1 14 1298.15
36 1460 171.5 362 1064 914.4 1022 889.0 1289.0 20 92.1 14 1472.04
38 1460 190.5 352 1073 965.2 1099 939.8 1289.0 20 92.1 19 1436.84
40 1510 196.9 364 1127 1016.0 1162 990.6 1339.8 24 92.1 21 1518.64
42 1560 206.4 371 1176 1066.0 1213 1040.6 1390.6 24 92.1 21 1654.33
44 1650 214.4 391 1235 1117.6 1270 1092.2 1463.7 24 98.4 22 1941.88
46 1735 225.5 411 1292 1168.4 1334 1143.0 1536.7 24 104.8 22 2261.24
48 1785 233.4 419 1343 1219.2 1384 1193.8 1587.5 24 104.8 24 2425.26


Standards, Dimensions & Weight of WN flange

The welding neck flange is the best designed butt-welded flange of those currently available becuase of its inherent structural value.

Most common flange types

Regardless of custom sizing or specifications, the fundamental design of most flanges falls under six common styles created to close, connect, cover, or support pipes and pipe systems.



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