Size DN15

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FLANGE DIMENSIONS TABLE SIZE (DN) 15 (1/2″)

Class/Table Flange O.D. PCD Bolts Bolt Size Hole Size Minimum Flange Thickness*
Cast Iron Copper Alloy Ductile Iron Steel
ANSI 125 B16.1 3 1/2″ / 89mm 2 3/8″ / 60.3mm 4 1/2″ 5/8″ / 16mm 5/16″ / 8mm 5/16″ / 8mm
ANSI 150 B16.5 3 1/2″ / 89mm 2 3/8″ / 60.3mm 4 1/2″ 5/8″ / 16mm 5/16″ / 8mm 5/16″ / 8mm
ANSI 300 B16.5 3 3/4″ / 95.25mm 2 5/8″ / 66.60mm 4 1/2″ 5/8″ / 16mm 9/16″ / 14mm
ANSI 600 B16.5 3 3/4″ / 95mm 2 5/8″ / 66.7mm 4 1/2″ 5/8″ / 16mm 9/16″ / 14mm
ANSI 900 B16.5 4 3/4″ / 121mm 3 1/4″ / 82.6mm 4 3/4″ 7/8″ / 22mm 7/8″ / 22mm
ANSI 1500 B16.5 4 3/4″ / 121mm 3 1/4″ / 82.6mm 4 3/4″ 7/8″ / 22mm 7/8″ / 22mm
ANSI 2500 B16.5 5 1/4″ / 133mm 3 1/2″ / 88.9mm 4 3/4″ 7/8″ / 22mm 1 1/8″ / 30mm
ISO7005-1/AS4331.1 ⑤ PN20 (ANSI 150) 89mm 60mm 4 M14 16mm 11mm
ISO7005-1/AS4331.1 ⑤ PN50 (ANSI 300) 95mm 66mm 4 M14 16mm 14mm
ISO7005-1/AS4331.1 ⑤ PN110 (ANSI 600) 120mm 66mm 4 M14 16mm 14mm
ISO7005-1/AS4331.1 ⑤ PN150 (ANSI 900) 120mm 82mm 4 M20 22mm 22mm
ISO7005-1/AS4331.1 ⑤ PN260 (ANSI 1500) 135mm 82mm 4 M20 22mm 22mm
ISO7005-1/AS4331.1 ⑤ PN420 (ANSI 2500) 89mm 4 M20 22mm 30mm
AS2129 ① Table C 95mm 67mm 4 13mm 14mm 13mm 13mm 10mm
AS2129 ① Table D 95mm 67mm 4 13mm 14mm 6mm 13mm 10mm
AS2129 ① Table E 95mm 67mm 4 13mm 14mm 6mm 13mm 10mm
AS2129 ① Table F 95mm 67mm 4 13mm 14mm 8mm 13mm 10mm
AS2129 ① Table H 14mm 83mm 4 16mm 17mm 16mm 10mm 13mm
AS2129 ① Table J 114mm 83mm 4 16mm 17mm 16mm 16mm
AS4087 ① PN14 95mm 67mm 4 M12 14mm 6mm
AS4087 ① PN16
AS4087 ① PN21
AS4087 ① PN35
BS10 Table D 3 3/4″ / 95mm 2 5/8″ / 67mm 4 1/2″ 9/16″ / 14mm 1/2″ / 13mm 1/4″ / 6mm 3/8″ / 10mm
BS10 Table E 3 3/4″ / 95mm 2 5/8″ / 67mm 4 1/2″ 9/16″ / 14mm 1/2″ / 13mm 1/4″ / 6mm 3/8″ / 10mm
BS10 Table F 3 3/4″ / 95mm 2 5/8″ / 67mm 4 1/2″ 9/16″ / 14mm 1/2″ / 13mm 5/16″ / 8mm 3/8″ / 10mm
BS10 Table H 4 1/2″ / 114mm 3 1/4″ / 83mm 4 5/8″ 11/16″ / 17mm 5/8″ / 16mm 3/8″ / 10mm 1/2″ / 13mm
BS10 Table J 4 1/2″ / 114mm 3 1/4″ / 83mm 4 5/8″ 11/16″ / 17mm 5/8″ / 16mm 5/8″ / 16mm
BS10 Table K 4 1/2″ / 114mm 3 1/4″ / 83mm 4 5/8″ 11/16″ / 17mm 3/4″ / 19mm 3/4″ / 19mm
BS4504 ② PN6 80mm 55mm 4 M10 11mm 12mm
BS4504 ② PN10 95mm 65mm 4 M12 14mm 14mm
BS4504 ② PN16 95mm 65mm 4 M12 14mm 14mm
BS4504 ② PN25 95mm 65mm 4 M12 14mm 16mm 8mm 16mm
BS4504 ②PN40 95mm 65mm 4 M12 14mm 9mm 16mm
BS4504 ②PN64 105mm 75mm 4 M12 14mm 20mm
BS4504 ② PN100 105mm 75mm 4 M12 14mm 20mm
EN1092-1/2/3 ③ PN6 80mm  55mm 4 M10 11mm 12mm 12mm
EN1092-1/2/3 ③ PN10  95mm  65mm 4 M12 14mm 14mm 14mm 16mm
EN1092-1/2/3 ③ PN16  95mm  65mm 4 M12 14mm 14mm 14mm 16mm
EN1092-1/2/3 ③ PN25  95mm  65mm 4 M12 14mm 16mm 14mm 16mm
EN1092-1/2/3 ③ PN40  95mm  65mm 4 M12 14mm 16mm
EN1092-1/2/3 ③ PN63  105mm  75mm 4 M12 14mm 20mm
EN1092-1/2/3 ③ PN100  105mm  75mm 4 M12 14mm 20mm

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. 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 drilling 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 Aluminum 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 aluminum 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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