British Flange Standards
| PN 100 | FLANGE THICKNESS | LTB | DRILLING DATA | PN 100 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOMINAL PIPE SIZE | FLANGE OUTSIDE DIAMETER | THICKNESS OF FLANGE | THICKNESS OF BLIND | THICKNESS OF W/N & BOSSEDS SOW | BOSSED LENGTH | WELD NECK LENGTH | PITCH CIRCLE DIAMETER | BOLT HOLE DIAMETER | NUMBER OF BOLT HOLES | NOMINAL PIPE SIZE | ||
| MM | INCH | C | T | T1 | T2 | L | L1 | PCD | # | H | MM | INCH |
| 10 | 3/8 | 100 | 20 | 20 | 20 | 28 | 45 | 70 | 14 | 4 | 10 | 3/8 |
| 15 | 1/2 | 105 | 20 | 20 | 20 | 28 | 45 | 75 | 14 | 4 | 15 | 1/2 |
| 20 | 3/4 | 130 | 22 | 22 | 22 | 30 | 48 | 90 | 18 | 4 | 20 | 3/4 |
| 25 | 1 | 140 | 24 | 24 | 24 | 32 | 58 | 100 | 18 | 4 | 25 | 1 |
| 32 | 1 1/4 | 155 | 24 | 24 | 24 | 32 | 60 | 110 | 22 | 4 | 32 | 1 1/4 |
| 40 | 1 1/2 | 170 | 26 | 26 | 26 | 34 | 62 | 125 | 22 | 4 | 40 | 1 1/2 |
| 50 | 2 | 195 | 28 | 28 | 28 | 36 | 68 | 145 | 26 | 4 | 50 | 2 |
| 65 | 2 1/2 | 220 | 30 | 30 | 30 | 40 | 76 | 170 | 26 | 8 | 65 | 2 1/2 |
| 80 | 3 | 230 | 34 | 32 | 32 | 44 | 78 | 180 | 26 | 8 | 80 | 3 |
| 100 | 4 | 265 | 36 | 36 | 36 | 52 | 90 | 210 | 30 | 8 | 100 | 4 |
| 125 | 5 | 315 | 42 | 40 | 40 | 56 | 105 | 250 | 33 | 8 | 125 | 5 |
| 150 | 6 | 355 | 48 | 44 | 44 | 60 | 115 | 290 | 33 | 12 | 150 | 6 |
| 200 | 8 | 430 | 60 | 52 | 52 | N/A | 130 | 360 | 36 | 12 | 200 | 8 |
| 250 | 10 | 505 | 72 | 60 | 60 | N/A | 157 | 430 | 39 | 12 | 250 | 10 |
| 300 | 12 | 585 | 84 | 68 | 68 | N/A | 170 | 500 | 42 | 16 | 300 | 12 |
| 350 | 14 | 655 | 95 | 74 | 74 | N/A | 189 | 560 | 48 | 16 | 350 | 14 |
NOTES:
(1) Further sizes are available from 400NB to 500NB
(2) Flanges dimensions for PN160 to PN400 are also available but as yet not listed in catalogue.
Balcombe Engineering Pty Ltd has been the leading Australian specialist flange manufacturer in the flange industry for over 50 years servicing a diverse range of customers for flanges, spectacle blinds, and tubeplates
