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Flange Dimensions for DN20
Dimensional tables for PN, ANSI and BS10 DN20mm (3/4 Inch) flanges.
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| DIMENSION TABLES FOR 20mm (3/4 Inch) FLANGES | ||||||||
|---|---|---|---|---|---|---|---|---|
| BS EN 1092 | DIAMETER OF FLANGE (A) | BOLT CIRCLE DIAMETER (G) | number OF BOLTS | BOLT SIZE | DIAMETER OF HOLES (D) | DIAMETER OF RAISED FACE (C) | HEIGHT OF RAISED FACE (F) | THICKNESS (E) |
PN | ||||||||
| PN 6 | 90 | 65 | 4 | M10 | 11 | 50 | 2 | 14 |
| PN 10 | 105 | 75 | 4 | M12 | 14 | 58 | 2 | 18 |
| PN 16 | 105 | 75 | 4 | M12 | 14 | 58 | 2 | 18 |
| PN 25 | 105 | 75 | 4 | M12 | 14 | 58 | 2 | 18 |
| PN 40 | 105 | 75 | 4 | M12 | 14 | 58 | 2 | 18 |
| PN 64 | 130 | 90 | 4 | M16 | 18 | 58 | 2 | 22 |
| PN 100 | 130 | 90 | 4 | M16 | 18 | 58 | 2 | 22 |
ANSI | ||||||||
| Class 125 / 150 | 3 7/8 (98) | 2 3/4 (70) | 4 | 1/2 (13) | 5/8 (16) | 1 11/16 (43) | 1/16 (2) | 9/16 (14) |
| Class 300 | 4 5/8 (117) | 3 1/4 (83) | 4 | 5/8 (16) | 3/4 (19) | 1 11/16 (43) | 1/16 (2) | 5/8 (16) |
| Class 600 | 4 5/8 (117) | 3 1/4 (83) | 4 | 5/8 (16) | 3/4 (19) | 1 11/16 (43) | 1/4 (6) | 5/8 (16) |
| Class 900 | 5 1/8 (130) | 3 1/2 (89) | 4 | 3/4 (19) | 7/8 (22) | 1 11/16 (43) | 1/4 (6) | 1 (25) |
| Class 1500 | 5 1/8 (130) | 3 1/2 (89) | 4 | 3/4 (19) | 7/8 (22) | 1 11/16 (43) | 1/4 (6) | 1 (25) |
BS 10 | ||||||||
| Table A | 4 (102) | 2 7/8 (73) | 4 | 1/2 (13) | 9/16 (14) | - | - | - |
| Table D | 4 (102) | 2 7/8 (73) | 4 | 1/2 (13) | 9/16 (14) | - | - | 3/8 (10) |
| Table E | 4 (102) | 2 7/8 (73) | 4 | 1/2 (13) | 9/16 (14) | - | - | 3/8 (10) |
| Table F | 4 (102) | 2 7/8 (73) | 4 | 1/2 (13) | 9/16 (14) | - | - | 3/8 (10) |
| Table H | 4 1/2 (114) | 3 1/4 (83) | 4 | 5/8 (16) | 11/16 (17) | 2 1/4 (57) | 1/16 (2) | 1/2 (13) |
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