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Flanges: Backing Flanges

Forged carbon steel backing flange for use with OSNA®-10 inner stub end.

  • Rating:

Class 150 for 16 bar at 75°C and 20 bar at 38°C to EEMUA Publication No. 145: Section 1.

  • Material Composition:

ASTM A 105 (normalised).

Unless otherwise specified the steel flanges will be supplied galvanised to BS 729. If required the galvanised flanges can be further protected with a polyamide epoxy type paint suitable for marine environment.



Download dxf-file



  b           Approx. Total Weight
Size D min d2 d5 K No. of e incl. Stub End ­ kg
in mm mm mm in / mm mm mm Bolts mm S 16 Bar L S 20 Bar L
1/2 16.00 89.00 14.00 5/8 15.90 19.00 60.30 4 2.00 As for 20 bar 0.64 0.66
3/4 25.00 98.00 14.00 5/8 15.90 33.00 69.80 4 3.00 0.80 0.80
1 30.00 108.00 14.00 5/8 15.90 33.00 79.40 4 3.00 1.00 1.04
1 1/4 38.00 117.00 14.00 5/8 15.90 41.00 88.90 4 3.00 1.20 1.20
1 1/2 44.50 127.00 14.00 5/8 15.90 48.00 98.40 4 3.00 1.50 1.50
2 57.00 152.00 18.00 3/4 19.00 62.00 120.60 4 3.00 2.50 2.60
2 1/2 76.10 178.00 18.00 3/4 19.00 81.00 139.70 4 3.00 3.30 3.40
3 88.90 190.00 19.00 3/4 19.00 94.00 152.40 4 3.00 3.80 3.90
4 108.00 229.00 24.00 3/4 19.00 113.00 190.50 8 3.00 6.60 6.90
6 159.00 279.00 27.00 7/8 22.20 164.00 241.30 8 4.00 9.70 10.40 9.90 10.70
8 219.10 343.00 31.00 7/8 22.20 225.00 298.40 8 5.00 15.00 16.70 15.10 17.00
10 267.00 406.00 38.00 1 25.40 273.00 362.00 12 5.00 23.10 26.60 23.50 27.50
12 323.90 483.00 41.00 1 25.40 330.00 431.80 12 7.00 34.60 41.00 35.20 43.10
14 368.00 533.00 45.00 1 1/8 28.60 374.00 476.20 12 7.00 44.70 53.40 45.50 55.80
16 419.00 597.00 51.00 1 1/8 28.60 426.00 539.80 16 7.00 60.00 70.50 60.60 72.50
18 457.20 635.00 52.00 1 1/4 31.80 465.00 577.80 16 7.00 66.00 78.00 68.00 84.30
20 508.00 698.00 58.00 1 1/4 31.80 517.00 635.00 20 7.00 84.40 98.70 86.00 103.50
24 610.00 813.00 71.00 1 3/8 34.90 618.00 749.30 20 9.00 131.40 149.80 134.00 156.50
28 711.00 927.00 81.00 1 3/8 34.90 727.00 864.00 28 9.00 180.30 202.90 183.60 212.10
32 813.00 1060.0 95.00 1 5/8 41.10 829.00 978.00 28 9.00 269.00 296.80 275.50 311.20
36 914.00 1168.00 105.00 1 5/8 41.10 931.00 1086.00 32 9.00 335.80 369.80 341.00 385.80






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