Flange Dimensions Calculator

The Flange Dimensions Guide will help you easily find basic measurements and bolting information for many of the commonly used flange standards

Option 1 - Search by Diameter

Option 2 - Search by Category

Flange Diagram

Flange Dimensions

Flange Dimensions Data

Nominal Size Standard Class / Table Outside Diameter Pitch Circle Diameter No. Holes Hole Diameter Bolt Diameter Minimum Flange Thickness
Cast Iron Ductile Iron Copper Alloy Steel
15mmAS 4087PN1495674M1214--6-
15mmAS 4087PN16---------
15mmAS 4087PN21---------
15mmAS 4087PN35---------
15mmAS 2129Table A95674M1214131365
15mmAS 2129Table D95674M1214131365
15mmAS 2129Table E95674M1214131366
15mmAS 2129Table F95674M12141313810
15mmAS 2129Table H115834M161816161013
15mmISO 7005PN680554M101112-612
15mmISO 7005PN1095654M121414-614
15mmISO 7005PN1695654M121414-6-
15mmISO 7005PN209060.54M1416---11.5
15mmISO 7005PN2595654M121416-814
15mmISO 7005PN4095654M121416-914
15mmANSI B16.51509060.341/2" - 12.75/8" - 15.9---11.2
15mmANSI B16.53009566.741/2" - 12.75/8" - 15.9---14.3
15mmANSI B16.56009566.741/2" - 12.75/8" - 15.9---14.3
20mmAS 4087PN14105734M1214--6-
20mmAS 4087PN16---------
20mmAS 4087PN21---------
20mmAS 4087PN35---------
20mmAS 2129Table A100734M1214131365
20mmAS 2129Table D100734M1214131365
20mmAS 2129Table E105734M1214131366
20mmAS 2129Table F105734M12141313810
20mmAS 2129Table H120924M161816161013
20mmISO 7005PN690654M101114-614
20mmISO 7005PN10105754M121416-616
20mmISO 7005PN16105754M121416-6-
20mmISO 7005PN20105754M1416---14.2
20mmISO 7005PN25105754M121416-816
20mmISO 7005PN40105754M121416-1016
20mmANSI B16.51501007041/2" - 12.75/8" - 15.9---12.7
20mmANSI B16.530011579.445/8" - 15.93/4" - 19.1---15.9
20mmANSI B16.560012079.445/8" - 15.93/4" - 19.1---17.5
25mmAS 4087PN14115834M1214--6-
25mmAS 4087PN16---------
25mmAS 4087PN21---------
25mmAS 4087PN35---------
25mmAS 2129Table A115834M1214131365
25mmAS 2129Table D115834M1214131365
25mmAS 2129Table E120834M1214131366
25mmAS 2129Table F120834M12141313810
25mmAS 2129Table H135984M161816161013
25mmISO 7005PN6100754M101114-614
25mmISO 7005PN10115854M121416-616
25mmISO 7005PN16115854M121416-6-
25mmISO 7005PN20115854M1416---14.2
25mmISO 7005PN25115854M121416-816
25mmISO 7005PN40115854M121418-1116
25mmANSI B16.515011079.441/2" - 12.75/8" - 15.9---14.3
25mmANSI B16.530012588.945/8" - 15.93/4" - 19.1---17.5
25mmANSI B16.560013092.145/8" - 15.93/4" - 19.1---20.7
32mmAS 4087PN14120874M1214--8-
32mmAS 4087PN16---------
32mmAS 4087PN21---------
32mmAS 4087PN35---------
32mmAS 2129Table A120874M1214161686
32mmAS 2129Table D120874M1214161686
32mmAS 2129Table E120874M1214161688
32mmAS 2129Table F135984M161816161013
32mmAS 2129Table H135984M161822221117
32mmISO 7005PN6120904M121416-816
32mmISO 7005PN101401004M161818-818
32mmISO 7005PN161401004M161818-8-
32mmISO 7005PN20120894M141613131013
32mmISO 7005PN251401004M161820-918
32mmISO 7005PN401401004M161820-1118
32mmANSI B16.515011588.941/2" - 12.75/8" - 15.9---15.9
32mmANSI B16.530013598.445/8" - 15.93/4" - 19.1---19.1
32mmANSI B16.560013598.445/8" - 15.93/4" - 19.1---20.7
40mmAS 4087PN14135984M1214--10-
40mmAS 4087PN16---------
40mmAS 4087PN21---------
40mmAS 4087PN35---------
40mmAS 2129Table A135984M12141616106
40mmAS 2129Table D135984M12141616106
40mmAS 2129Table E135984M12141616109
40mmAS 2129Table F1401054M161816161113
40mmAS 2129Table H1401054M161822221317
40mmISO 7005PN61301004M121416-916
40mmISO 7005PN101501104M16181819918
40mmISO 7005PN161501104M161818199-
40mmISO 7005PN2013098.54M141614.514.51114.5
40mmISO 7005PN251501104M161820191118
40mmISO 7005PN401501104M161820191318
40mmANSI B16.515012598.441/2" - 12.75/8" - 15.9---17.5
40mmANSI B16.5300155114.343/4" - 19.17/8" - 22.2---20.7
40mmANSI B16.5600155114.343/4" - 19.17/8" - 22.2---22.3
50mmAS 4087PN141501144M1618--10-
50mmAS 4087PN161501144M1618---11
50mmAS 4087PN211651274M1618---15
50mmAS 4087PN351651274M1618---19
50mmAS 2129Table A1501144M16181616108
50mmAS 2129Table D1501144M16181717108
50mmAS 2129Table E1501144M161819191010
50mmAS 2129Table F1651274M161819191116
50mmAS 2129Table H1651274M161825251319
50mmISO 7005PN61401104M121416-1116
50mmISO 7005PN101651254M161820191120
50mmISO 7005PN161651254M1618201911-
50mmISO 7005PN20150*120.54M161816161316
50mmISO 7005PN251651254M161822191120
50mmISO 7005PN401651254M161822191320
50mmANSI B16.5150150120.745/8" - 15.93/4" - 19.1---19.1
50mmANSI B16.530016512785/8" - 15.93/4" - 19.1---22.3
50mmANSI B16.560016512785/8" - 15.93/4" - 19.1---25.4
65mmAS 4087PN141651274M1618--11-
65mmAS 4087PN161651274M1618---11
65mmAS 4087PN211851468M1618---15
65mmAS 4087PN351851468M1618---19
65mmAS 2129Table A1651274M16181717118
65mmAS 2129Table D1651274M16181717118
65mmAS 2129Table E1651274M161819191110
65mmAS 2129Table F1851468M161819191316
65mmAS 2129Table H1851468M161825251419
65mmISO 7005PN61601304M121416-1216
65mmISO 7005PN101851454+M161820191320
65mmISO 7005PN161851454+M161820191320
65mmISO 7005PN20180139.54M161817.517.51417.5
65mmISO 7005PN251851458M161824191322
65mmISO 7005PN401851458M161824191422
65mmANSI B16.5150180139.745/8" - 15.93/4" - 19.1---22.3
65mmANSI B16.5300190149.283/4" - 19.17/8" - 22.2---25.4
65mmANSI B16.5600190149.283/4" - 19.17/8" - 22.2---28.6
80mmAS 4087PN141851464M161819-13-
80mmAS 4087PN161851464M1618-18-11
80mmAS 4087PN212051658M161819--15
80mmAS 4087PN352051658M16182922-24
80mmAS 2129Table A1851464M161817171310
80mmAS 2129Table D1851464M161819191310
80mmAS 2129Table E1851464M161819191311
80mmAS 2129Table F2051658M161819191416
80mmAS 2129Table H2051658M161829291622
80mmISO 7005PN61901504M161818-1318
80mmISO 7005PN102001608M161822191320
80mmISO 7005PN162001608M161822191320
80mmISO 7005PN20190152.54M161819191618.5
80mmISO 7005PN252001608M161826191424
80mmISO 7005PN402001608M161826191624
80mmANSI B16.5150190152.445/8" - 15.93/4" - 19.1---23.9
80mmANSI B16.5300210168.383/4" - 19.17/8" - 22.2---28.6
80mmANSI B16.5600210168.383/4" - 19.17/8" - 22.2---31.8
100mmAS 4087PN142151784M161822-22-
100mmAS 4087PN162151784M1618-20-13
100mmAS 4087PN212301918M161822--19
100mmAS 4087PN352301918M16183222-24
100mmAS 2129Table A2151784M161819191610
100mmAS 2129Table D2151784M161819191610
100mmAS 2129Table E2151788M161822221613
100mmAS 2129Table F2301918M161822221719
100mmAS 2129Table H2301918M161832321925
100mmISO 7005PN62101704M161818-1418
100mmISO 7005PN102201808M161824191622
100mmISO 7005PN162201808M161824191622
100mmISO 7005PN20230190.58M161824241724
100mmISO 7005PN252351908M202228191724
100mmISO 7005PN402351908M202228191924
100mmANSI B16.5150230190.585/8" - 15.93/4" - 19.1---23.9
100mmANSI B16.530025520083/4" - 19.17/8" - 22.2---31.8
100mmANSI B16.5600275215.987/8" - 22.21" - 25.4---38.1
125mmAS 4087PN142452108M161824-24-
125mmAS 4087PN162452108M1618-21-16
125mmAS 4087PN212702358M202224--19
125mmAS 4087PN352702358M20223528-27
125mmAS 2129Table A2452108M161822221610
125mmAS 2129Table D2452108M161822221610
125mmAS 2129Table E2452108M161824241713
125mmAS 2129Table F2702358M202225251719
125mmAS 2129Table H2702358M202235352125
125mmISO 7005PN62502008M161819-1619
125mmISO 7005PN102502108M161825221722
125mmISO 7005PN162702208M161825221722
125mmISO 7005PN20250210.58M161825251922
125mmISO 7005PN252702208M202230221928
125mmISO 7005PN402802258M202230222128
125mmANSI B16.5150270215.983/4" - 19.17/8" - 22.2---25.4
125mmANSI B16.530028023587/8" - 22.21" - 25.4---34.9
125mmANSI B16.560030025481" - 25.41-1/8" - 28.6---44.5
150mmAS 4087PN142802418M161824-26-
150mmAS 4087PN162802418M1618-23-19
150mmAS 4087PN212902548M202224--20
150mmAS 4087PN353002608M20223530-28
150mmAS 2129Table A2802418M161822221611
150mmAS 2129Table D2802418M161822221611
150mmAS 2129Table E2802418M161824241713
150mmAS 2129Table F2902548M202225251819
150mmAS 2129Table H3002608M202235352128
150mmISO 7005PN62852408M161819-1819
150mmISO 7005PN102852408M202226221924
150mmISO 7005PN163002508M202226221924
150mmISO 7005PN203002528M202229252026
150mmISO 7005PN253002508M202232222028
150mmISO 7005PN403102608M202232252228
150mmANSI B16.5150280241.383/4" - 19.17/8" - 22.2---25.4
150mmANSI B16.5300320269.987/8" - 22.21" - 25.4---38.1
150mmANSI B16.5600340292.181" - 25.41-1/8" - 28.6---44.5
200mmAS 4087PN143352988M161826-29--
200mmAS 4087PN163352988M1618-25-19-
200mmAS 4087PN2135031812M202226--21-
200mmAS 4087PN3537533312M20223832-32-
200mmAS 2129Table A3352988M161824241713-
200mmAS 2129Table D3352988M161824241713-
200mmAS 2129Table E3402988M202226261916-
200mmAS 2129Table F35031812M202227271921-
200mmAS 2129Table H37533312M202238382232-
200mmISO 7005PN63402958M161820-1820-
200mmISO 7005PN103402958M202229221928-
200mmISO 7005PN1634029512M202229221928-
200mmISO 7005PN2035030712M202230282128-
200mmISO 7005PN2535531012M202232252128-
200mmISO 7005PN4037532012M242634282332-
200mmANSI B16.5150340298.583/4" - 19.17/8" - 22.2---28.6-
200mmANSI B16.5300375330.2127/8" - 22.21" - 25.4---41.1-
200mmANSI B16.5600405362121-1/8" - 28.61-1/4" - 31.8---47.8-
225mmAS 4087PN143703248M161825----
225mmAS 4087PN163703248M1618-24-19-
225mmAS 4087PN2140535612M242629--30-
225mmAS 4087PN3540535612M24264134-38-
225mmAS 2129Table A----------
225mmAS 2129Table D----------
225mmAS 2129Table E----------
225mmAS 2129Table F----------
225mmAS 2129Table H----------
225mmISO 7005PN6----------
225mmISO 7005PN10----------
225mmISO 7005PN16----------
225mmISO 7005PN20----------
225mmISO 7005PN25----------
225mmISO 7005PN40----------
225mmANSI B16.5150----------
225mmANSI B16.5300----------
225mmANSI B16.5600----------
250mmAS 4087PN144053568M202225----
250mmAS 4087PN164053568M2022-24-19-
250mmAS 4087PN2143038112M242632--30-
250mmAS 4087PN3543038112M24264434-38-
250mmAS 2129Table A4053568M202224241916-
250mmAS 2129Table D4053568M202225251916-
250mmAS 2129Table E40535612M202225252222-
250mmAS 2129Table F43038112M242629292525-
250mmAS 2129Table H43038112M242641413535-
250mmISO 7005PN637533512M161824-2024-
250mmISO 7005PN1039535012M202228222226-
250mmISO 7005PN1640535512M242632222426-
250mmISO 7005PN2040536212M242630302530.5-
250mmISO 7005PN2542537012M2729.53624.53032-
250mmISO 7005PN4045038512M3032.54634.53638-
250mmANSI B16.5150405362127/8" - 22.21" - 25.4---30.2-
250mmANSI B16.5300445387.4161" - 25.41 1/8" - 28.6---47.7-
250mmANSI B16.5600510431.8161 1/4" - 31.81 3/8" - 34.9---63.5-
300mmAS 4087PN1445540612M202229----
300mmAS 4087PN1645540612M2022-30-23-
300mmAS 4087PN2149043816M242632--30-
300mmAS 4087PN3549043816M24264438-38-
300mmAS 2129Table A4554068M202224242219-
300mmAS 2129Table D45540612M202225252219-
300mmAS 2129Table E45540612M242629292525-
300mmAS 2129Table F49043816M242632322929-
300mmAS 2129Table H49043816M242644443838-
300mmISO 7005PN644039512M202224-2224-
300mmISO 7005PN1044540012M20222824.52626-
300mmISO 7005PN1646041012M24263224.52828-
300mmISO 7005PN2048543212M242632322732-
300mmISO 7005PN2548543016M2729.54027.53234-
300mmISO 7005PN4051545016M3032.55039.54042-
300mmANSI B16.5150485431.8127/8" - 22.21" - 25.4---31.8-
300mmANSI B16.5300520450.8161 1/8" - 28.61 1/4" - 31.8---50.8-
300mmANSI B16.5600560489201 1/4" - 31.81 3/8" - 34.9---66.7-
350mmAS 4087PN1452547012M242632----
350mmAS 4087PN1652547012M2426-33-30-
350mmAS 4087PN2155049516M273035--30-
350mmAS 4087PN3555049516M27304841-48-
350mmAS 2129Table A5254708M242625252522-
350mmAS 2129Table D52547012M242629292522-
350mmAS 2129Table E52547012M242632322525-
350mmAS 2129Table F55049516M273035353232-
350mmAS 2129Table H55049516M273048484141-
350mmISO 7005PN649044512M202226-2224-
350mmISO 7005PN1050546016M20223024.52626-
350mmISO 7005PN1652047016M24263626.53030-
350mmISO 7005PN2053547612M2729.535353535-
350mmISO 7005PN2555549016M3032.544302638-
350mmISO 7005PN4058051016M3335.554444646-
350mmANSI B16.5150535476.3121" - 25.41 1/8" - 28.6---35-
350mmANSI B16.5300585514.4201 1/8" - 28.61 1/4" - 31.8---54-
350mmANSI B16.5600605527201 3/8" - 34.91 1/2" - 38.1---69.9-
400mmAS 4087PN1458052112M242632----
400mmAS 4087PN1658052112M2426-33-30-
400mmAS 4087PN2161055220M273035--38-
400mmAS 4087PN3561055220M27305144-48-
400mmAS 2129Table A58052112M242627272522-
400mmAS 2129Table D58052112M242629292522-
400mmAS 2129Table E58052112M242632322525-
400mmAS 2129Table F61055220M273035353232-
400mmAS 2129Table H61055220M273051514444-
400mmISO 7005PN654049516M202228-2224-
400mmISO 7005PN1056551516M24263224.52626-
400mmISO 7005PN1658052516M2729.538283232-
400mmISO 7005PN2060054016M2729.536.536.53737-
400mmISO 7005PN2562055016M3335.548323840-
400mmISO 7005PN4066058516M363962485050-
400mmANSI B16.5150595539.8161" - 25.41 1/8" - 28.6---36.6-
400mmANSI B16.5300650571.5201 1/4" - 31.81 3/8" - 34.9---57.2-
400mmANSI B16.5600685603.2201 1/2" - 38.11 5/8" - 41.3---76.2-

Important Notes

Compatibility Notes

  • Drilling for AS 4087 Class PN14 & PN16 is compatible with AS 2129, Table D
  • Drilling for AS 4087 Class PN21 & PN35 is compatible with AS 2129, Table F & Table H
  • Drilling for ISO 7005 is compatible with AS/NZS 4331, BS 4504 & DIN 2533
  • Drilling for ANSI B16.5, Class 150 is compatible with ANSI B16.1 Class 125
  • * When made from cast or ductile iron, this flange features an outside diameter of 155mm
  • + When made from steel, these flanges feature 8 holes

No Matching Results Found

We couldn't find any flange dimensions matching your search criteria. Please try different parameters or contact us for custom fabrication services.

Contact Us Reset All Search Criteria

No Matching Results Found

We couldn't find any flange dimensions matching your search criteria. Please try different parameters or contact us for custom fabrication services.

Contact Us Reset All Search Criteria