Size DN150

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FLANGE DIMENSIONS TABLE SIZE (DN) 150 (6″)

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 11″ / 279mm 9 1/2″ / 241.3mm 8 3/4″ 7/8″ / 22mm 1″ / 25mm 13/16″ / 21mm 1″ / 25mm
ASME Class 150 B16.24/B16.42/B16.5 11″ / 279mm 9 1/2″ / 241.3mm 8 3/4″ 7/8″ / 22mm 20.6mm 25mm 23.9mm
ASME Class 250 B16.1 12 1/2″ / 318mm 10 5/8″ / 269.9mm 12 3/4″ 7/8″ / 22mm 36mm
ASME Class 300 B16.24/B16.42/B16.5 12 1/2″ / 318mm 10 5/8″ / 269.9mm 12 3/4″ 7/8″ / 22mm 1 3/16″ / 30mm 37mm 1 7/16″ / 37mm
ASME Class 600 B16.5 14″ / 356mm 11 1/2″ / 292.1mm 12 1″ 1 1/8″ / 29mm 1 7/8″ / 48mm
ASME Class 900 B16.5 15″ / 381mm 12 1/2″ / 317.5mm 12 1 1/8″ 1 1/4″ / 32mm 2 3/16″ / 56mm
ASME Class 1500 B16.5 15 1/2″ / 394mm 12 1/2″ / 317.5mm 12 1 3/8″ 1 1/2″ / 38mm 3 1/4″ / 83mm
ASME Class 2500 B16.5 19″ / 483mm 14 1/2″ / 368.3mm 8 2″ 2 1/8″ / 54mm 4 1/4″ / 108mm
ISO7005-1/AS4331.1 ⑤ PN20 (ANSI 150) 280mm 241mm 8 M20 22mm 25mm
ISO7005-1/AS4331.1 ⑤ PN50 (ANSI 300) 320mm 270mm 12 M20 22mm 37mm
ISO7005-1/AS4331.1 ⑤ PN110 (ANSI 600) 355mm 292mm 12 M27 29mm 48mm
ISO7005-1/AS4331.1 ⑤ PN150 (ANSI 900) 380mm 317mm 12 M30 32mm 56mm
ISO7005-1/AS4331.1 ⑤ PN260 (ANSI 1500) 395mm 317mm 12 M36 39mm 83mm
ISO7005-1/AS4331.1 ⑤ PN420 (ANSI 2500) 485mm 368mm 8 M52 55mm 108mm
AS2129 ① Table C 280mm 235mm 8 M16 18mm 22mm 22mm 17mm
AS2129 ① Table D 280mm 235mm 8 M16 18mm 21mm 17mm 21mm 17mm
AS2129 ① Table E 280mm 235mm 8 M20 22mm 22mm 17mm 22mm 17mm
AS2129 ① Table F 305mm 260mm 12 M20 22mm 25mm 22mm 25mm 22mm
AS2129 ① Table H 305mm 260mm 12 M20 22mm 35mm 25mm 35mm 29mm
AS2129 ① Table J 305mm 260mm 12 M24 26mm 38mm 38mm
AS4087 ① PN14 280mm 235mm 8 M16 18mm 22mm 22mm
AS4087 ① PN16 280mm 235mm 8 M16 18mm 23mm 13mm
AS4087 ① PN21 305mm 260mm 12 M20 22mm 25mm 24mm
AS4087 ① PN35 305mm 260mm 12 M20 22mm 35mm 27mm 31mm
BS10 Table D 11″ / 279mm 9 1/4″ / 235mm 8 5/8″ 11/16″ / 17mm 13/16″ / 21mm 11/16″ / 17mm 11/16″ / 17mm
BS10 Table E 11″ / 279mm 9 1/4″ / 235mm 8 3/4″ 7/8″ / 22mm 7/8″ / 22mm 11/16″ / 17mm 11/16″ / 17mm
BS10 Table F 12″ / 305mm 10 1/4″ / 260mm 12 3/4″ 7/8″ / 22mm 1″ / 25mm 7/8″ / 22mm 7/8″ / 22mm
BS10 Table H 12″ / 305mm 10 1/4″ / 260mm 12 3/4″ 7/8″ / 22mm 1 3/8″ / 35mm 1″ / 25mm 1 1/8″ / 29mm
BS10 Table J 12″ / 305mm 10 1/4″ / 260mm 12 7/8″ 1″ / 25mm 1 1/2″ / 38mm 1 1/2″ / 38mm
BS10 Table K 12″ / 305mm 10 1/4″ / 260mm 12 7/8″ 1″ / 25mm 1 5/8″ / 41mm 1 5/8″ / 41mm
ISO7005-1/2 AS4331.1/.2 ⑤ PN6 265mm 225mm 8 M16 18mm 20mm 18mm
ISO7005-1/2 AS4331.1/.2 ⑤ PN10 285mm 240mm 8 M20 22mm 26mm 19mm 22mm
ISO7005-1/2 AS4331.1/.2 ⑤ PN16 285mm 240mm 8 M20 22mm 26mm 19mm 22mm
ISO7005-1/2 AS4331.1/.2 ⑤ PN25 300mm 250mm 8 M24 26mm 34mm 20mm 28mm
ISO7005-1/2 AS4331.1/.2 ⑤ PN40 300mm 225mm 8 M24 26mm 26mm 28mm
BS4504 ② PN6 265mm 225mm 8 M16 18mm 20mm
BS4504 ② PN10 285mm 240mm 8 M20 22mm 26mm
BS4504 ② PN16 285mm 240mm 8 M20 22mm 26mm 22mm
BS4504 ② PN25 300mm 250mm 8 M24 26mm 34mm 28mm
BS4504 ② PN40 300mm 250mm 8 M24 26mm 28mm
BS4504 ② PN64 345mm 280mm 8 M30 33mm 36mm
BS4504 ② PN100 355mm 290mm 12 M30 33mm 44mm
EN1092-1/2/3 ③ PN6 265mm 225mm 8 M16 18mm 20mm 18mm
EN1092-1/2/3 ③ PN10 285mm 240mm 8 M20 22mm 26mm 19mm 22mm
EN1092-1/2/3 ③ PN16 285mm 240mm 8 M20 22mm 26mm 19mm 22mm
EN1092-1/2/3 ③ PN25 300mm 250mm 8 M24 26mm 34mm 20mm 28mm
EN1092-1/2/3 ③ PN40 300mm 250mm 8 M24 26mm 26mm 28mm
EN1092-1/2/3 ③ PN63 345mm 280mm 8 M30 33mm 36mm
EN1092-1/2/3 ③ PN100 355mm 290mm 12 M30 33mm 44mm
JIS B2220/B2239/B2240 5K 265mm 230mm 8 M16 19mm 22mm 18mm 18mm 18mm
JIS B2220/B2239/B2240 10K 280mm 240mm 8 M20 23mm 26mm 22mm 22mm 22mm
JIS B2220/B2239/B2240 16K 305mm 260mm 12 M22 25mm 28mm 24mm 24mm 24mm
JIS B2220/B2239 20K 305mm 260mm 12 M22 25mm 32mm 28mm 28mm

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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