Dimensions Weld Neck & Slip-On flanges BS 3293 Class 150



Weld Neck flange

OTHER PRESSURE CLASSES

150
300
400
600

Foreword

NPS O B1 C Y2 Y1 A
26 869.9 666.7 50.8 127.0 85.7 660.4
28 927.1 717.6 52.4 128.6 87.3 711.2
30 984.2 768.3 54.0 130.2 88.9 762.0
32 1060.4 819.1 57.1 133.3 92.1 812.8
34 1111.2 869.9 58.7 134.9 93.7 863.6
36 1168.4 920.7 60.3 136.5 95.2 914.4
38 1238.2 971.5 60.3 136.5 95.2 965.2
40 1289.0 1022.3 63.5 139.7 98.4 1016.0
42 1346.2 1073.2 66.7 142.9 101.6 1066.8
44 1403.3 1123.9 66.7 142.9 101.6 1117.6
46 1454.2 1174.7 68.3 144.5 103.2 1168.4
48 1511.1 1225.5 69.9 146.1 104.8 1219.2


Slip-On flange

NPS X R NBH DBH D r
26 723.9 742.9 24 34.9 806.4 6.35
28 781.0 793.7 28 34.9 863.6 6.35
30 831.8 857.2 28 34.9 914.4 6.35
32 889.0 908.0 28 41.3 977.9 7.94
34 939.8 958.8 32 41.3 1028.7 7.94
36 996.9 1022.3 32 41.3 1085.8 7.94
38 1060.4 1073.1 32 41.3 1149.3 9.53
40 1111.2 1123.9 36 41.3 1200.1 9.53
42 1168.4 1193.8 36 41.3 1257.3 9.53
44 1219.2 1244.6 40 41.3 1314.4 11.11
46 1270.0 1295.4 40 41.3 1365.2 11.11
48 1327.2 1358.9 44 41.3 1422.4 11.11

General note..

  • All dimensions above are in millimeters unless otherwise indicated.

Indications..

  • NPS = Nominal Pipe Size
  • O = Outside Diameter of Flange
  • B1 = Flange Bore Slip-On
  • C = Thickness of Flange Min
  • Y2 = Weld Neck Overall Length
  • Y1 = Slip-On Overall Length
  • A = Weld Neck Diameter at Weld Bevel
  • X = Weld Neck / Slip-On Hub Diameter
  • R = Raised Face (O.D.) Outside Diameter
  • NBH = Number of Bolt Holes
  • DBH = Diameter of Bolt Holes
  • r = Fillet Radius
  • D = Diameter of Bolt Circle
  • B2 = To be specified by purchaser
  • Rf = Class 150-300 Rf height 1.6mm
    Class 400-600 Rf height 6.35mm

Weights of Class 150 Weld Neck & Slip-On flanges

NPS Weld Neck
kg
Slip-On
kg
26 118 107
28 134 122
30 153 138
32 190 170
34 212 184
36 242 211
38 284 249
40 311 272
42 358 313
44 376 331
46 399 349
48 440 381

Note..

  • Weights are based on manufacturer's data and are approximate


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