British Flange Standards
PN 40 | FLANGE THICKNESS | LTB | DRILLING DATA | PN 40 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | 90 | 14 | 16 | 16 | 22 | 35 | 60 | 14 | 4 | 15 | 3/8 |
15 | 1/2 | 95 | 14 | 16 | 16 | 24 | 38 | 65 | 14 | 4 | 15 | 1/2 |
20 | 3/4 | 105 | 16 | 18 | 18 | 26 | 40 | 75 | 14 | 4 | 20 | 3/4 |
25 | 1 | 115 | 16 | 18 | 18 | 28 | 40 | 85 | 14 | 4 | 25 | 1 |
32 | 1 1/4 | 140 | 18 | 18 | 18 | 30 | 42 | 100 | 18 | 4 | 32 | 1 1/4 |
40 | 1 1/2 | 150 | 18 | 18 | 18 | 32 | 45 | 110 | 18 | 4 | 40 | 1 1/2 |
50 | 2 | 165 | 20 | 20 | 20 | 34 | 48 | 125 | 18 | 4 | 50 | 2 |
65 | 2 1/2 | 185 | 22 | 22 | 22 | 38 | 52 | 145 | 18 | 8 | 65 | 2 1/2 |
80 | 3 | 200 | 24 | 24 | 24 | 40 | 58 | 160 | 18 | 8 | 80 | 3 |
100 | 4 | 235 | 26 | 24 | 24 | 44 | 65 | 190 | 22 | 8 | 100 | 4 |
125 | 5 | 270 | 28 | 26 | 26 | 48 | 68 | 220 | 26 | 8 | 125 | 5 |
150 | 6 | 300 | 30 | 28 | 28 | 52 | 75 | 250 | 26 | 8 | 150 | 6 |
200 | 8 | 375 | 36 | 36 | 34 | 52 | 88 | 320 | 30 | 12 | 200 | 8 |
250 | 10 | 450 | 42 | 38 | 38 | 60 | 105 | 385 | 33 | 12 | 250 | 10 |
300 | 12 | 515 | 52 | 42 | 42 | 67 | 115 | 450 | 33 | 16 | 300 | 12 |
350 | 14 | 580 | 58 | 46 | 46 | 72 | 125 | 510 | 36 | 16 | 350 | 14 |
400 | 16 | 660 | 65 | 50 | 50 | 78 | 135 | 585 | 39 | 16 | 400 | 16 |
450 | 18 | 685 | TBA | 57 | 57 | 84 | 135 | 610 | 39 | 20 | 450 | 18 |
500 | 20 | 755 | TBA | 57 | 57 | 90 | 140 | 670 | 42 | 20 | 500 | 20 |
600 | 24 | 890 | TBA | 72 | 72 | 100 | 150 | 795 | 48 | 20 | 600 | 24 |
NOTES:
(1) Further sizes are available from 700NB to 1600NB
(2) Stocked flanges, except blinds, are generally supplied as raised face.