ISO PN 20 flanges - DN 15 to 600 - Long welding neck

Standard ASME B 16.5 - 1996
Description ISO PN 20 flange - DN 15 - Long welding neck - Raised face
Part number ASME B 16.5 - LWNF - ISO PN 20 - DN 15 - N 20 - RF
Note Raised face
Product selection
Selector Nominal Ø (mm) Flange Ø (mm) Outside Ø (mm) Number of drillings Fixing Ø (mm) Drillings Ø (mm) Flange thickness (mm)
1 15 89 30.5 4 60.3 15.8 11.2
2 20 99 38 4 69.8 15.8 12.7
3 25 108 51 4 79.4 15.8 14.3
4 32 117 60.5 4 88.9 15.8 15.7
5 40 127 67 4 98.4 15.8 17.5
6 50 152 82.5 4 120.6 19 19.1
7 65 178 95.5 4 139.7 19 22.3
8 80 190 108 4 152.4 19 23.9
9 90 216 124 8 177.8 19 23.9
10 100 229 140 8 190.5 19 23.9
11 125 254 165 8 215.9 22.2 23.9
12 150 279 197 8 241.3 22.2 25.4
13 200 343 248 8 298.4 22.2 28.5
14 250 406 305 12 362 25.4 30.2
15 300 483 365 12 431.8 25.4 31.8
16 350 533 406.5 12 476.2 28.5 35
17 400 597 457 16 539.8 28.5 36.6
18 450 635 508 16 577.8 31.8 39.7
19 500 698 559 20 635 31.8 42.9
20 600 813 667 20 749.3 35 47.7
Nominal Ø (mm)
Flange Ø (mm)
Outside Ø (mm)
Number of drillings
Fixing Ø (mm)
Drillings Ø (mm)
Flange thickness (mm)