Size DN200

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FLANGE DIMENSIONS TABLE SIZE (DN) 200 (8″)

Class/Table Flange O.D. PCD Bolts Bolt Size Hole Size Minimum Flange Thickness*
Cast Iron Copper Alloy Ductile Iron Steel
ASME Class 125 B16.1 13 1/2″ / 343mm 11 3/4″ / 298.5mm 8 3/4″ 7/8″ / 22mm 1 1/8″ / 29mm 15/16″ / 24mm 1 1/8″ / 29mm
ASME Class 150 B16.24/B16.42/B16.5 13 1/2″ / 343mm 11 3/4″ / 298.5mm 8 3/4″ 7/8″ / 22mm 23.9mm 29mm 26.9mm
ASME Class 250 B16.1 15″ / 381mm 13″ / 330.2mm 12 7/8″ 1″ / 25mm 41mm
ASME Class 300 B16.524/B16.42/B16.5 15″ / 381mm 13″ / 330.2mm 12 7/8″ 1″ / 25mm 1 3/8″ / 35mm 41mm 1 5/8″ / 41mm
ASME Class 600 B16.5 16 1/2″ / 419mm 13 3/4″ / 349.2mm 12 1 1/8″ 1 1/4″ / 32mm 2 3/16″ / 56mm
ASME Class 900 B16.5 18 1/2″ / 470mm 15 1/2″ / 393.7mm 12 1 3/8″ 1 1/2″ / 38mm 2 1/2″ / 64mm
ASME Class 1500 B16.5 19″ / 483mm 15 1/2″ / 393.7mm 12 1 5/8″ 1 3/4″ / 44mm 3 5/8″ / 92mm
ASME Class 2500 B16.5 21 3/4″ / 552.5mm 17 1/4″ / 438.2mm 12 2″ 2 1/8″ / 54mm 5″ / 127mm
ISO7005-1/AS4331.1⑤ PN20 (ANSI 150) 345mm 298mm 8 M20 22mm 29mm
ISO7005-1/AS4331.1⑤ PN50 (ANSI 300) 380mm 330mm 12 M24 26mm 41mm
ISO7005-1/AS4331.1⑤ PN110 (ANSI 600) 420mm 349mm 12 M30 32mm 55mm
ISO7005-1/AS4331.1⑤ PN150 (ANSI 900) 470mm 393mm 12 M36 39mm 63mm
ISO7005-1/AS4331.1⑤ PN260 (ANSI 1500) 484mm 393mm 12 M42 45mm 92mm
ISO7005-1/AS4331.1⑤ PN420 (ANSI 2500) 550mm 438mm 12 M52 55mm 127mm
AS2129① Table C 335mm 292mm 8 M16 18mm 25mm 25mm 19mm
AS2129① Table D 335mm 292mm 8 M16 18mm 22mm 19mm 22mm 19mm
AS2129① Table E 335mm 292mm 8 M20 22mm 25mm 19mm 25mm 19mm
AS2129① Table F 370mm 324mm 12 M20 22mm 29mm 25mm 29mm 25mm
AS2129① Table H 370mm 324mm 12 M20 22mm 38mm 32mm 38mm 32mm
AS2129① Table J 370mm 324mm 12 M24 26mm 41mm 41mm
AS4087① PN14 335mm 292mm 8 M16 18mm 25mm
AS4087① PN16 335mm 292mm 8 M16 18mm 23mm 19mm
AS4087① PN21 370mm 324mm 12 M20 22mm 29mm 24mm
AS4087① PN35 370mm 324mm 12 M20 22mm 41mm 31mm 31mm
BS10 Table D 13 1/4″ / 337mm 11 1/2″ / 292mm 8 5/8″ 11/16″ / 17mm 7/8″ / 22mm 3/4″ / 19mm 3/4″ / 19mm
BS10 Table E 13 1/4″ / 337mm 11 1/2″ / 292mm 8 3/4″ 7/8″ / 22mm 1″ / 25mm 3/4″ / 19mm 3/4″ / 19mm
BS10 Table F 14 1/2″ / 368mm 12 3/4″ / 324mm 12 3/4″ 7/8″ / 22mm 1 1/8″ / 29mm 1″ / 25mm 1″ / 25mm
BS10 Table H 14 1/2″ / 368mm 12 3/4″ / 324mm 12 3/4″ 7/8″ / 22mm 1 1/2″ / 38mm 1 1/4″ / 32mm 1 1/4″ / 32mm
BS10 Table J 14 1/2″ / 368mm 12 3/4″ / 324mm 12 7/8″ 1″ / 25mm 1 5/8″ / 41mm 1 5/8″ / 41mm
BS10 Table K 14 1/2″ / 368mm 12 1/2″ / 318mm 12 1″ 1 1/8″ / 29mm 1 7/8″ / 48mm 1 7/8″ / 48mm
ISO7005-1/2/ AS4331.1/.2⑤ PN6 320mm 280mm 8 M16 18mm 22mm 20mm
ISO7005-1/2/ AS4331.1/.2⑤ PN10 340mm 295mm 8 M20 22mm 26mm 20mm 24mm
ISO7005-1/2/ AS4331.1/.2⑤ PN16 340mm 295mm 12 M20 22mm 30mm 20mm 24mm
ISO7005-1/2/ AS4331.1/.2⑤ PN25 360mm 310mm 12 M24 26mm 34mm 22mm 30mm
ISO7005-1/2/ AS4331.1/.2⑤ PN40 375mm 320mm 12 M27 30mm 30mm 34mm
BS4504② PN6 320mm 280mm 8 M16 18mm 22mm
BS4504② PN10 340mm 295mm 8 M20 22mm 26mm
BS4504② PN16 340mm 295mm 12 M20 22mm 30mm 24mm
BS4504② PN25 360mm 310mm 12 M24 26mm 34mm 30mm
BS4504② PN40 375mm 320mm 12 M27 30mm 34mm
BS4504② PN64 415mm 345mm 12 M33 36mm 42mm
BS4504② PN100 430mm 360mm 12 M33 36mm 52mm
EN1092-1/2/3③ PN6 320mm 280mm 8 M16 18mm 22mm 20mm
EN1092-1/2/3③ PN10 340mm 295mm 8 M20 22mm 26mm 20mm 24mm
EN1092-1/2/3③ PN16 340mm 295mm 12 M20 22mm 30mm 20mm 24mm
EN1092-1/2/3③ PN25 360mm 310mm 12 M24 26mm 34mm 22mm 30mm
EN1092-1/2/3③ PN40 375mm 320mm 12 M27 30mm 30mm 34mm
EN1092-1/2/3③ PN63 415mm 345mm 12 M33 36mm 42mm
EN1092-1/2/3③ PN100 430mm 360mm 12 M33 36mm 52mm

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 ISO7005-1 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 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.

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.

Refer EN1092-3 copper alloy, EN1092-4 aluminium alloy.

ISO7005-1 & ISO7005-2 (which AS4331.1/2 mirrors) replaces DIN 2501 & DIN 2533 and BS4504 PN6 to 40. ISO7005-1 & 7005-2 PN6 to 40 is the same as EN1092-1/2 (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 (ISO7005-1 refers to EN1092-1 for steel flange sizes), 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. Note where we combine ISO/AS/EN above, some standards do not publish some flange materials, so do not assume CI/DI/Steel/Copper Alloy is published in all three standards. The thicknesses for integral flanges are not the same as for welding & blind flanges. Furthermore ISO7005-1 PN ratings refer to EN 1092-1 which are also published below. EN 1092-2 ratings are generally also aligned with ISO7005-2 which once again are also published below.

* Varies according to flange type (thickness usually includes raised face height where applicable) refer to standard. Some standards publish integral flange thicknesses used for valves which are often different than blind or welding flange thicknesses hence refer to standard for clarification. Refer links to flange standards in the technical screen of our website.

This above table is a rough ready reckoner only to understand standards, differences & commonality and to assess interchangeability. Refer to the standard required itself before manufacture.

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