British Flange Standards
BSEN1092 PN100 flange specifications cover nominal pipe sizes from 10mm (3/8") to 350mm (14"). The table includes flange outside diameters ranging from 100mm to 655mm, with thicknesses from 20mm to 95mm. Available in Plate Slip On, Bossed, Blind, and Weld Neck configurations, with pitch circle diameters from 70mm to 560mm. Bolt hole diameters range from 14mm to 48mm, with 4 to 16 bolt holes depending on size.
| 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.
