FLANGE DIMENSIONS TABLE SIZE (DN) 300 (12″)
| Class/Table | Flange O.D. | PCD | Bolts | Bolt Size | Hole Size | Minimum Flange Thickness* | |||
|---|---|---|---|---|---|---|---|---|---|
| Cast Iron | Ductile Iron | Copper Alloy | Steel | ||||||
| ASME Class 125 B16.1 | 19″ / 483mm | 17″ / 432mm | 12 | 7/8″ | 1″ / 25mm | 1 1/4″ / 32mm | 1 1/16″ / 27mm | 1 1/4″ / 32mm | |
| ASME Class 150 B16.5/B16.42 | 19″ / 483mm | 17″ / 432mm | 12 | 7/8″ | 1″ / 25mm | 32mm | |||
| ASME Class 250 B16.1 | 20 1/2″ / 521mm | 17 3/4″ / 451mm | 16 | 1 1/8″ | 1 1/4″ / 32mm | 51mm | |||
| ASME Class 300 B16.5/B16.42 | 20 1/2″ / 521mm | 17 3/4″ / 451mm | 16 | 1 1/8″ | 1 1/4″ / 32mm | 51mm | 2″ / 51mm | ||
| ASME Class 600 B16.5 | 22″ / 559mm | 19 1/4″ / 489mm | 20 | 1 1/4″ | 1 3/8″ / 35mm | 2 5/8″ / 67mm | |||
| ASME Class 900 B16.5 | 24″ / 610mm | 21″ / 533mm | 20 | 1 3/8″ | 1 1/2″ / 38mm | 3 1/8″ / 79mm | |||
| ASME Class 1500 B16.5 | 26 1/2″ / 673mm | 22 1/2″ / 572mm | 16 | 2″ | 2 1/8″ / 54mm | 4 7/8″ / 124mm | |||
| ASME Class 2500 B16.5 | 30″ / 762.1mm | 24 3/8″ / 619mm | 12 | 2 3/4″ | 2 7/8″ / 73mm | 7 1/4″ / 184mm | |||
| ISO7005-1/AS4331.1⑤ PN20 (ANSI 150) | 485mm | 432mm | 12 | M24 | 26mm | 32mm | |||
| ISO7005-1/AS4331.1⑤ PN50 (ANSI 300) | 520mm | 451mm | 16 | M30 | 32mm | 51mm | |||
| ISO7005-1/AS4331.1⑤ PN110 (ANSI 600) | 610mm | 489mm | 20 | M33 | 35mm | 67mm | |||
| ISO7005-1/AS4331.1⑤ PN150 (ANSI 900) | 675mm | 533mm | 20 | M36 | 39mm | 79mm | |||
| ISO7005-1/AS4331.1⑤ PN260 (ANSI 1500) | 760mm | 571mm | 16 | M52 | 55mm | 124mm | |||
| ISO7005-1/AS4331.1⑤ PN260 (ANSI 2500) | 619mm | 619mm | 12 | M70 | 74mm | 184mm | |||
| AS2129① Table C | 455mm | 406mm | 12 | M20 | 22mm | 29mm | 29mm | 22mm | |
| AS2129① Table D | 455mm | 406mm | 12 | M20 | 22mm | 25mm | 22mm | 22mm | |
| AS2129① Table E | 455mm | 406mm | 12 | M24 | 26mm | 29mm | 25mm | 25mm | |
| AS2129① Table F | 490mm | 438mm | 16 | M24 | 26mm | 32mm | 29mm | 29mm | |
| AS2129① Table H | 490mm | 438mm | 16 | M24 | 26mm | 44mm | 38mm | 38mm | |
| AS2129① Table J | 490mm | 438mm | 16 | M27 | 30mm | 51mm | |||
| AS4087① PN14 | 455mm | 406mm | 12 | M20 | 22mm | 29mm | |||
| AS4087① PN16 | 455mm | 406mm | 12 | M20 | 22mm | 30mm | 23mm | ||
| AS4087① PN21 | 490mm | 438mm | 16 | M24 | 26mm | 32mm | 30mm | ||
| AS4087① PN35 | 490mm | 438mm | 16 | M24 | 26mm | 44mm | 38mm | 38mm | |
| BS10 Table D | 18″ / 457mm | 16″ / 406mm | 12 | 3/4″ | 7/8″ / 22mm | 1″ / 25mm | 7/8″ / 22mm | 7/8″ / 22mm | |
| BS10 Table E | 18″ / 457mm | 16″ / 406mm | 12 | 7/8″ | 1″ / 25mm | 1 1/8 / 29mm | 1″ / 25mm | 1″ / 25mm | |
| BS10 Table F | 19 1/4″ / 489mm | 17 1/4″ / 438mm | 16 | 7/8″ | 1″ / 25mm | 1 1/4″ / 32mm | 1 1/8″ / 29mm | 1 1/8″ / 29mm | |
| BS10 Table H | 19 1/4″ / 489mm | 17 1/4″ / 438mm | 16 | 7/8″ | 1″ / 25mm | 1 3/4″ / 44mm | 1 1/2″ / 38mm | 1 1/2″ / 38mm | |
| BS10 Table J | 19 1/4″ / 489mm | 17 1/4″ / 438mm | 16 | 1″ | 1 1/8″ / 29mm | 2″ / 51mm | |||
| BS10 Table K | 19 1/4″ / 489mm | 17″ / 432mm | 16 | 1 1/8″ | 1 1/4″ / 32mm | 1 1/4″ / 32mm | |||
| ISO7005-1/2 AS4331.1/.2⑤ PN6 | 440mm | 395mm | 12 | M20 | 22mm | 24mm | |||
| ISO7005-1/2 AS4331.1/.2⑤ PN10 | 445mm | 400mm | 12 | M20 | 22mm | 28mm | 24.5mm | ||
| ISO7005-1/2 AS4331.1/.2⑤ PN16 | 460mm | 410mm | 12 | M24 | 26mm | 32mm | 24.5mm | ||
| ISO7005-1/2 AS4331.1/.2⑤ PN25 | 485mm | 430mm | 16 | M27 | 30mm | 40mm | 27.5mm | ||
| ISO7005-1/2 AS4331.1/.2⑤ PN40 | 515mm | 450mm | 16 | M30 | 33mm | 39.5mm | |||
| BS4504② PN6 | 440mm | 395mm | 12 | M20 | 22mm | 24mm | |||
| BS4504② PN10 | 445mm | 400mm | 12 | M20 | 22mm | 28mm | |||
| BS4504② PN16 | 460mm | 410mm | 12 | M24 | 26mm | 32mm | 28mm | ||
| BS4504② PN25 | 485mm | 430mm | 16 | M27 | 30mm | 40mm | 34mm | ||
| BS4504② PN40 | 515mm | 450mm | 16 | M30 | 33mm | 42mm | |||
| BS4504② PN64 | 530mm | 460mm | 16 | M33 | 36mm | 52mm | |||
| BS4504② PN100 | 585mm | 500mm | 16 | M39 | 42mm | 68mm | |||
| EN1092-1/2/3③ PN6 | 440mm | 395mm | 12 | M20 | 22mm | 24mm | ④ | 22mm | |
| EN1092-1/2/3③ PN10 | 445mm | 400mm | 12 | M20 | 22mm | 28mm | 24.5mm | ④ | 26mm |
| EN1092-1/2/3③ PN16 | 460mm | 410mm | 12 | M24 | 26mm | 32mm | 24.5mm | ④ | 28mm |
| EN1092-1/2/3③ PN25 | 485mm | 430mm | 16 | M27 | 30mm | 40mm | 27.5mm | ④ | 34mm |
| EN1092-1/2/3③ PN40 | 515mm | 450mm | 16 | M30 | 33mm | 39.5mm | ④ | 42mm | |
| EN1092-1/2/3③ PN64 | 530mm | 460mm | 16 | M33 | 36mm | ④ | 52mm | ||
| EN1092-1/2/3③ PN100 | 585mm | 500mm | 16 | M39x3 | 42mm | ④ | 68mm | ||
① AS2129 still in use but now only covers Table D to H. Table C now obsolete, Table J to T now replaced by AS4331.1 which is a replication of ISO7500-1 which in turn is equivalent to ASME 150-2500 class ANSI B16.5. AS4331.1 and ISO 7005-1 also incorporates previous DIN PN rated flanging. AS4087 is the new standard covering Table D to H. The same drilling is specified but the PN rating system is used (PN14 to PN35) and in some cases flange thickness varies slightly. AS4087 PN14 & PN16 are the same drilling as AS2129 Table D. AS4087 PN21 is the same drilling and rating as AS2129 Table F. AS4087. AS4087 PN14 & PN16 is the same drilling as AS2129 Table D. AS4087 PN21 is the same rating and drilling as AS2129 Table F and PN35 is the same drilling as Table H. AS4087 specifies raised face in Ductile Iron PN16 & PN35 and flat face in Grey Cast Iron PN14, PN21, PN35. Click here to view full AS4087 flanging dimensions.
② British metric standard BS4504 is now obsolete and replaced by EN1092-1 edition 09-2008 for steel flanges which also incorporates DIN2501 standard. EN1092-1 is also published in the British standards as BS-EN1092-1. Flange drillings in EN1092-1 are generally the same as BS4504 but EN1092-1 covers a wider range.
③ EN1092-1 is for steel flanges, EN1092-2 is for Iron flanges, EN1092-3 is for Copper Alloy flanges, EN1092-4 is for Aluminium flanges. Regarding EN1092-2 Iron flanges, these figures are for integral flanges on valves, etc. Cast (Grey) Iron thicknesses are shown in Cast Iron column. EN1092-2 specifies a thinner flange thickness for Ductile Iron in larger sizes which is shown in the Ductile Iron column. For full EN1092-1 table Click here EN1092-1 is for steel flanges.
④ Refer EN1092-3 copper alloy, EN1092-4 aluminium alloy.
⑤ ISO7005-1 & ISO 7005-2 (which AS4331.1 mirrors) replaces DIN 2501 & DIN 2533 and BS4504 PN6 to 40. ISO7005-1 & 7005-2 PN6 to 40 is the same as EN1092-1 (note some flanges thicknesses vary slightly) but also incorporates ANSI flanging redesignated as PN20, PN50, PN110, PN150, PN260, PN420. ISO7005-1/AS4331.1 is steel flanges, ISO7005-2/AS4331.2 is iron flanges, ISO7005-3/AS4331.3 is copper alloy flanges. AS4331.1 is a reproduction of ISO7005-1, AS4331.2 is a reproduction of ISO7005-2, AS4331.3 is a reproduction of ISO7005-3.
* Varies according to flange type (thickness includes raised face height where applicable) refer to standard
