Size DN80

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FLANGE DIMENSIONS TABLE SIZE (DN) 80 (3″)

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 7 1/2″ / 191mm 6″ / 152.4mm 4 5/8″ 3/4″ / 19mm 3/4″ / 19mm 5/8″ / 16mm 3/4″ / 19mm
ASME Class 150 B16.24/B16.42/B16.5 7 1/2″ / 191mm 6″ / 152.4mm 4 5/8″ 3/4″ / 19mm 15.7mm 24mm 22.3mm
ASME Class 250 B16.1 8 1/4″ / 210mm 6 5/8″ / 168.3mm 8 3/4″ 7/8″ / 22mm 29mm
ASME Class 300 B16.24/B16.42/B16.5 8 1/4″ / 210mm 6 5/8″ / 168.3mm 8 3/4″ 7/8″ / 22mm 29/32″ / 23mm 28mm 1 1/8″ / 29mm
ASME Class 600 B16.5 8 1/4″ / 210mm 6 5/8″ / 168.3mm 8 3/4″ 7/8″ / 22mm 1 1/4″ / 32mm
ASME Class 900 B16.5 9 1/2″ / 241mm 7 1/2″ / 190.5mm 8 7/8″ 1″ / 25mm 1 1/2″ / 38mm
ASME Class 1500 B16.5 10 1/2″ / 267mm 8″ / 203.2mm 8 1 1/8″ 1 1/4″ / 32mm 1 7/8″ / 48mm
ASME Class 2500 B16.5 12″ / 305mm 9″ / 228.6mm 8 1 1/4″ 1 3/8″ / 35mm 2 5/8″ / 67mm
ISO7005-1/AS4331.1⑤ PN20 (ANSI 150) 190mm 152mm 4 M16 18mm 24mm
ISO7005-1/AS4331.1⑤ PN50 (ANSI 300) 210mm 168mm 8 M20 22mm 29mm
ISO7005-1/AS4331.1⑤ PN110 (ANSI 600) 210mm 168mm 8 M20 22mm 32mm
ISO7005-1/AS4331.1⑤ PN150 (ANSI 900) 240mm 190mm 8 M24 26mm 38mm
ISO7005-1/AS4331.1⑤ PN260 (ANSI 1500) 265mm 203mm 8 M30 32mm 48mm
ISO7005-1/AS4331.1⑤ PN420 (ANSI 2500) 305mm 228mm 8 M33 35mm 67mm
AS2129① Table C 185mm 146mm 4 M16 18mm 19mm 19mm 14mm
AS2129① Table D 185mm 146mm 4 M16 18mm 19mm 13mm 14mm
AS2129① Table E 185mm 146mm 4 M16 18mm 19mm 13mm 14mm
AS2129① Table F 205mm 165mm 8 M16 18mm 19mm 14mm 16mm
AS2129① Table H 205mm 165mm 8 M16 18mm 29mm 16mm 22mm
AS2129① Table J 205mm 165mm 8 M20 22mm 32mm 32mm
AS4087① PN14 185mm 146mm 4 M16 18mm 19mm 13mm
AS4087① PN16 185mm 146mm 4 M16 18mm 18mm 11mm
AS4087① PN21 205mm 165mm 8 M16 18mm 19mm 15mm
AS4087① PN35 205mm 165mm 8 M16 18mm 29mm 22mm 24mm
BS10 Table D 7 1/4″ / 184mm 5 3/4″ / 146mm 4 5/8″ 11/16″ / 17mm 3/4″ / 19mm 1/2″ / 13mm 9/16″ / 14mm
BS10 Table E 7 1/4″ / 184mm 5 3/4″ / 146mm 4 5/8″ 11/16″ / 17mm 3/4″ / 19mm 1/2″ / 13mm 9/16″ / 14mm
BS10 Table F 8″ / 203mm 6 1/2″ / 165mm 8 5/8″ 11/16″ / 17mm 3/4″ / 19mm 9/16″ / 14mm 5/8″ / 16mm
BS10 Table H 8″ / 203mm 6 1/2″ / 165mm 8 5/8″ 11/16″ / 17mm 1 1/8″ / 29mm 5/8″ / 16mm 7/8″ / 22mm
BS10 Table J 8″ / 203mm 6 1/2″ / 165mm 8 3/4″ 7/8″ / 22mm 1 1/4″ / 32mm 1 1/4″ / 32mm
BS10 Table K 8″ / 203mm 6 1/2″ / 165mm 8 3/4″ 7/8″ / 22mm 1 1/4″ / 32mm 1 1/4″ / 32mm
ISO7005-1/2/ AS4331.1/.2⑤ PN6 190mm 150mm 4 M16 18mm 18mm 16mm
ISO7005-1/2/ AS4331.1/.2⑤ PN10 200mm 160mm 8 M16 18mm 22mm 19mm 20mm
ISO7005-1/2/ AS4331.1/.2⑤ PN16 200mm 160mm 8 M16 18mm 22mm 19mm 20mm
ISO7005-1/2/ AS4331.1/.2⑤ PN25 200mm 160mm 8 M16 18mm 26mm 19mm 24mm
ISO7005-1/2/ AS4331.1/.2⑤ PN40 200mm 160mm 8 M16 18mm 19mm 24mm
BS4504② PN6 190mm 150mm 4 M16 18mm 18mm
BS4504② PN10 200mm 160mm 8 M16 18mm 22mm
BS4504② PN16 200mm 160mm 8 M16 18mm 22mm 13mm 20mm
BS4504② PN25 200mm 160mm 8 M16 18mm 26mm 14mm 24mm
BS4504② PN40 200mm 160mm 8 M16 18mm 16mm 24mm
BS4504② PN64 215mm 170mm 8 M20 22mm 28mm
BS4504② PN100 230mm 180mm 8 M24 26mm 36mm
EN1092-1/2/3③ PN6 190mm 150mm 4 M16 18mm 18mm 16mm
EN1092-1/2/3③ PN10 200mm 160mm 8 M16 18mm 22mm 19mm 20mm
EN1092-1/2/3③ PN16 200mm 160mm 8 M16 18mm 22mm 19mm 20mm
EN1092-1/2/3③ PN25 200mm 160mm 8 M16 18mm 26mm 19mm 24mm
EN1092-1/2/3③ PN40 200mm 160mm 8 M16 18mm 19mm 24mm
EN1092-1/2/3③ PN63 215mm 170mm 8 M20 22mm 28mm
EN1092-1/2/3③ PN100 230mm 180mm 8 M22 26mm 32mm

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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