Flange Tables

Flanges are commonly used to connect valves into pipework making it easier for removal and maintenance.

Standards of flanges vary worldwide, meaning that in most cases they are not interchangeable. The size, drilling and pressure range will be different (ie a PN16 flange is not rated to the same pressure class as a PN40 flange...nor would a PN16 flange fit an ANSI 150 flange).

To make the selection process easy we use flange tables which show the most common standards used worldwide. These include: ANSI / ASME (USA), PN / DIN (European), BS10, Table E, Table D, Table F (British), and JIS/KS (Japanese/Korean).

Below are flange tables for critical flange dimensions to help identify what standard you have.

1/2" NB (DN15) 3/4" NB (DN20) 1" NB (DN25) 1 1/4" NB (DN32) 1 1/2" NB (DN40) 2" NB (DN50) 2 1/2" NB (DN65) 3" NB (DN80)

4" NB (DN100) 5" NB (DN125) 6" NB (DN150) 8" NB (DN200) 10" NB (DN250) 12" NB (DN300) Buy Flanges

 

1/2" NB (DN15) Flange Table - Flange Dimensions

1/2" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 80mm 55mm 4 M10  11mm 40mm 2mm
PN10 95mm 65mm 4 M12 14mm 45mm 2mm
PN16 95mm 65mm 4 M12 14mm 45mm 2mm
PN25 95mm 65mm 4 M12 14mm 45mm 2mm
PN40 95mm 65mm 4 M12 14mm 45mm 2mm
PN64 105mm 75mm 4 M12 14mm 45mm 2mm
Table D 3 3/4" (95mm) 2 5/8" (67mm) 4 1/2" (13mm) 9/16" (14mm)    
Table E 3 3/4" (95mm) 2 5/8" (67mm) 4 1/2" (13mm) 9/16" (14mm)    
Table F 3 3/4" (95mm) 2 5/8" (67mm) 4 1/2" (13mm) 9/16" (14mm)    
Table H 4 1/2" (114mm) 3 1/4" (83mm) 4 5/8" (16mm) 11/16" (17mm) 2 1/4" (57mm) 1/16" (2mm)
ANSI 125/150 3 1/2" (89mm) 2 3/8" (60mm) 4 1/2" (13mm) 5/8" (16mm) 1 3/8" (35mm) 1/16" (2mm)
ANSI 300 3 3/4" (95mm) 2 5/8" (67mm) 4 1/2" (13mm) 5/8" (16mm) 1 3/8" (35mm) 1/16" (2mm)

 

3/4" NB (DN20) Flange Table - Flange Dimensions

3/4" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 90mm 65mm 4 M10 11mm 50mm 2mm
PN10 105mm 75mm 4 M12 14mm 58mm 2mm
PN16 105mm 75mm 4 M12 14mm 58mm 2mm
PN25 105mm 75mm 4 M12 14mm 58mm 2mm
PN40 105mm 75mm 4 M12 14mm 58mm 2mm
PN64 130mm 90mm 4 M16 18mm 58mm 2mm
Table D 4" (102mm) 2 7/8" (73mm) 4 1/2" (13mm) 9/16" (14mm)    
Table E 4" (102mm) 2 7/8" (73mm) 4 1/2" (13mm) 9/16" (14mm)    
Table F 4" (102mm) 2 7/8" (73mm) 4 1/2" (13mm) 9/16" (14mm)    
Table H 4 1/2" (114mm) 3 1/4" (83mm) 4 5/8" (16mm) 11/16" (14mm) 2 1/4" (57mm) 1/16" (2mm)
ANSI 125/150 3 7/8" (98mm) 2 3/4" (70mm) 4 1/2" (13mm) 5/8" (16mm) 1 11/16" (43mm) 1/16" (2mm)
ANSI 300 4 5/8" (117mm) 3 1/4" (83mm) 4 5/8" (16mm) 3/4" (19mm) 1 11/16" (43mm) 1/16" (2mm)

 

1" NB (DN25) Flange Table - Flange Dimensions

1" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 100mm 75mm 4 M10 11mm 60mm 2mm
PN10 115mm 85mm 4 M12 14mm 68mm 2mm
PN16 115mm 85mm 4 M12 14mm 68mm 2mm
PN25 115mm 85mm 4 M12 14mm 68mm 2mm
PN40 115mm 85mm 4 M12 14mm 68mm 2mm
PN64 140mm 100mm 4 M16 18mm 68mm 2mm
Table D 4 1/2" (114mm) 3 1/4" (83mm) 4 1/2" (13mm) 9/16" (14mm)    
Table E 4 1/2" (114mm) 3 1/4" (83mm) 4 1/2" (13mm) 9/16" (14mm)    
Table F 4 3/4" (121mm) 3 7/16" (87mm) 4 5/8" (16mm) 11/16" (17mm) 2 1/2" (64mm) 1/16" (2mm)
Table H 4 3/4" (121mm) 3 7/16" (87mm) 4 5/8" (16mm) 11/16" (17mm) 2 1/2" (64mm) 1/16" (2mm)
ANSI 125/150 4 1/4" (108mm) 3 1/8" (79mm) 4 1/2" (13mm) 5/8" (16mm) 2" (51mm) 1/16" (2mm)
ANSI 300 4 7/8" (124mm) 3 1/2" (89mm) 4 5/8" (16mm) 3/4" (19mm) 2" (51mm) 1/16" (2mm)

 

1 1/4" NB (DN32) Flange Table - Flange Dimensions

1 1/4" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 120mm 90mm 4 M12 14mm 70mm 2mm
PN10 140mm 100mm 4 M16 18mm 78mm 2mm
PN16 140mm 100mm 4 M16 18mm 78mm 2mm
PN25 140mm 100mm 4 M16 18mm 78mm 2mm
PN40 140mm 100mm 4 M16 18mm 78mm 2mm
PN64 155mm 110mm 4 M20 22mm 78mm 2mm
Table D 4 3/4" (121mm) 3 7/16" (87mm) 4 1/2" (13mm) 9/16" (14mm)    
Table E 4 3/4" (121mm) 3 7/16" (87mm) 4 1/2" (13mm) 9/16" (14mm)    
Table F 5 1/4" (133mm) 3 7/8" (98mm) 4 5/8" (16mm) 11/16" (17mm)    
Table H 5 1/4" (133mm) 3 7/8" (98mm) 4 5/8" (16mm) 11/16" (17mm) 3" (76mm) 1/16" (2mm)
ANSI 125/150 4 5/8" (117mm) 3 1/2" (89mm) 4 1/2" (13mm) 5/8" (16mm) 2 1/2" (64mm) 1/16" (2mm)
ANSI 300 5 1/4" (133mm) 3 7/8" (98mm) 4 5/8" (16mm) 3/4" (19mm) 2 1/2" (64mm) 1/16" (2mm)

 

1 1/2" NB (DN40) Flange Table - Flange Dimensions

1 1/2" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 130mm 100mm 4 M12 14mm 80mm 3mm
PN10 150mm 110mm 4 M16 18mm 88mm 3mm
PN16 150mm 110mm 4 M16 18mm 88mm 3mm
PN25 150mm 110mm 4 M16 18mm 88mm 3mm
PN40 150mm 110mm 4 M16 18mm 88mm 3mm
PN64 170mm 125mm 4 M20 22mm 88mm 3mm
Table D 5 1/4" (133mm) 3 7/8" (98mm) 4 1/2" (13mm) 9/16" (14mm)    
Table E 5 1/4" (133mm) 3 7/8" (98mm) 4 1/2" (13mm) 9/16" (14mm)    
Table F 5 1/2" (140mm) 4 1/8" (105mm) 4 5/8" (16mm) 11/16" (17mm)    
Table H 5 1/2" (140mm) 4 1/8" (105mm) 4 5/8" (16mm) 11/16" (17mm) 3 1/4" (83mm) 1/16" (2mm)
ANSI 125/150 5" (127mm) 3 7/8" (98mm) 4 1/2" (13mm) 5/8" (16mm) 2 7/8" (73mm) 1/16" (2mm)
ANSI 300 6 1/8" (156mm) 4 1/4" (114mm) 4 3/4" (19mm) 7/8" (22mm) 2 7/8" (73mm) 1/16" (2mm)

 

2" NB (DN50) Flange Table - Flange Dimensions

2" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 140mm 110mm 4 M12 14mm 90mm 3mm
PN10 165mm 125mm 4 M16 18mm 102mm 3mm
PN16 165mm 125mm 4 M16 18mm 102mm 3mm
PN25 165mm 125mm 4 M16 18mm 102mm 3mm
PN40 165mm 125mm 4 M16 18mm 102mm 3mm
PN64 180mm 135mm 4 M20 22mm 102mm 3mm
Table D 6" (152mm) 4 1/2" (114mm) 4 5/8" (16mm) 11/16" (17mm)    
Table E 6" (152mm) 4 1/2" (114mm) 4 5/8" (16mm) 11/16" (17mm)    
Table F 6 1/2" (165mm) 5" (127mm) 4 5/8" (16mm) 11/16" (17mm)    
Table H 6 1/2" (165mm) 5" (127mm) 4 5/8" (16mm) 11/16" (17mm) 4" (102mm) 1/16" (2mm)
ANSI 125/150 6" (152mm) 4 3/4" (121mm) 4 5/8" (16mm) 3/4" (19mm) 3 5/8" (92mm) 1/16" (2mm)
ANSI 300 6 1/2" (165mm) 5" (127mm) 4 5/8" (16mm) 3/4" (19mm) 3 5/8" (92mm) 1/16" (2mm)

 

2 1/2" NB (DN65) Flange Table - Flange Dimensions

2 1/2" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 160mm 130mm 4 M14 14mm 110mm 3mm
PN10 185mm 145mm 4 M18 18mm 122mm 3mm
PN16 185mm 145mm 4 M18 18mm 122mm 3mm
PN25 185mm 145mm 8 M18 18mm 122mm 3mm
PN40 185mm 145mm 8 M18 18mm 122mm 3mm
PN64 205mm 160mm 8 M22 22mm 122mm 3mm
Table D 6 1/2" (165mm) 5" (127mm) 4 5/8" (16mm) 11/16" (17mm)    
Table E 6 1/2" (165mm) 5" (127mm) 4 5/8" (16mm) 11/16" (17mm)    
Table F 7 1/4" (184mm) 5 3/4" (146mm) 8 5/8" (16mm) 11/16" (17mm)    
Table H 7 1/4" (184mm) 5 3/4" (146mm) 8 5/8" (16mm) 11/16" (17mm) 4 1/2" (114mm) 1/16" (2mm)
ANSI 125/150 7" (178mm) 5 1/2" (140mm) 4 5/8" (16mm) 3/4" (19mm) 4 1/8" (105mm) 1/16" (2mm)
ANSI 300 7 1/2" (191mm) 5 7/8" (149mm) 8 3/4" (19mm) 7/8" (22mm) 4 1/8" (105mm) 1/16" (2mm)

 

3" NB (DN80) Flange Table - Flange Dimensions

3" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 190mm 150mm 4 M16 18mm 128mm 3mm
PN10 200mm 160mm 8 M16 18mm 138mm 3mm
PN16 200mm 160mm 8 M16 18mm 138mm 3mm
PN25 200mm 160mm 8 M16 18mm 138mm 3mm
PN40 200mm 160mm 8 M16 18mm 138mm 3mm
PN64 215mm 170mm 8 M20 22mm 138mm 3mm
Table D 7 1/4" (184mm) 5 3/4" (146mm) 4 5/8" (16mm) 11/16" (17mm)    
Table E 7 1/4" (184mm) 5 3/4" (146mm) 4 5/8" (16mm) 11/16" (17mm)    
Table F 8" (203mm) 6 1/2" (165mm) 8 5/8" (16mm) 11/16" (17mm)    
Table H 8" (203mm) 6 1/2" (165mm) 8 5/8" (16mm) 11/16" (17mm) 5" (127mm) 1/16" (2mm)
ANSI 125/150 7 1/2" (191mm) 6" (152mm) 4 5/8" (16mm) 3/4" (19mm) 5" (127mm) 1/16" (2mm)
ANSI 300 8 1/4" (210mm) 6 5/6" (168mm) 8 3/4" (19mm) 7/8" (22mm) 5" (127mm) 1/16" (2mm)

 

4" NB (DN100) Flange Table - Flange Dimensions

4" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 210mm 170mm 4 M16 18mm 148mm 3mm
PN10 220mm 180mm 8 M16 18mm 158mm 3mm
PN16 220mm 180mm 8 M16 18mm 158mm 3mm
PN25 235mm 190mm 8 M20 22mm 162mm 3mm
PN40 235mm 190mm 8 M20 22mm 162mm 3mm
PN64 250mm 200mm 8 M24 26mm 162mm 3mm
Table D 8 1/2" (216mm) 7" (178mm) 4 5/8" (16mm) 11/16" (17mm)    
Table E 8 1/2" (216mm) 7" (178mm) 8 5/8" (16mm) 11/16" (17mm)    
Table F 9" (229mm) 7 1/2" (191mm) 8 5/8" (16mm) 11/16" (17mm)    
Table H 9" (229mm) 7 1/2" (191mm) 8 5/8" (16mm) 11/16" (17mm) 6" (152mm) 1/16" (2mm)
ANSI 125/150 9" (229mm) 7 1/2" (191mm) 8 5/8" (16mm) 3/4" (19mm) 6 3/16" (157mm) 1/16" (2mm)
ANSI 300 10" (254mm) 7 7/8" (200mm) 8 3/4" (19mm) 7/8" (22mm) 6 3/16" (157mm) 1/16" (2mm)

 

5" NB (DN125) Flange Table - Flange Dimensions

5" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 240mm 200mm 4 M16 18mm 178mm 3mm
PN10 250mm 210mm 8 M16 18mm 188mm 3mm
PN16 250mm 210mm 8 M16 18mm 188mm 3mm
PN25 270mm 220mm 8 M24 26mm 188mm 3mm
PN40 270mm 220mm 8 M24 26mm 188mm 3mm
PN64 295mm 240mm 8 M27 30mm 188mm 3mm
Table D 10" (254mm) 8 1/4" (210mm) 8 5/8" (16mm) 11/16" (17mm)    
Table E 10" (254mm) 8 1/4" (210mm) 8 5/8" (16mm) 11/16" (17mm)    
Table F 11" (279mm) 9 1/4" (235mm) 8 3/4" (19mm) 7/8" (22mm)    
Table H 11" (279mm) 9 1/4" (235mm) 8 3/4" (19mm) 7/8" (22mm) 7" (178mm) 1/16" (2mm)
ANSI 125/150 10" (254mm) 8 1/2" (216mm) 8 3/4" (19mm) 7/8" (22mm) 7 5/16" (186mm) 1/16" (2mm)
ANSI 300 11" (279mm) 9 1/4" (235mm) 8 3/4" (19mm) 7/8" (22mm) 7 5/16" (186mm) 1/16" (2mm)

 

6" NB (DN150) Flange Table - Flange Dimensions

6" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 265mm 225mm 8 M16 18mm 202mm 3mm
PN10 285mm 240mm 8 M20 22mm 212mm 3mm
PN16 285mm 240mm 8 M20 22mm 212mm 3mm
PN25 300mm 250mm 8 M24 26mm 218mm 3mm
PN40 300mm 250mm 8 M24 26mm 218mm 3mm
PN64 345mm 280mm 8 M30 33mm 218mm 3mm
Table D 11" (279mm) 9 1/4" (235mm) 8 5/8" (16mm) 11/16" (17mm)    
Table E 11" (279mm) 9 1/4" (235mm) 8 3/4" (19mm) 7/8" (22mm)    
Table F 12" (305mm) 10 1/4" (260mm) 12 3/4" (19mm) 7/8" (22mm)    
Table H 12" (305mm) 10 1/4" (260mm) 12 3/4" (19mm) 7/8" (22mm) 2 1/4" (57mm) 1/16" (2mm)
ANSI 125/150 11" (279mm) 9 1/2" (241mm) 8 3/4" (19mm) 7/8" (22mm) 8 1/2" (216mm) 1/16" (2mm)
ANSI 300 12 1/2" (318mm) 10 5/8" (270mm) 12 3/4" (19mm) 7/8" (22mm) 8 1/2" (216mm) 1/16" (2mm)

 

8" NB (DN200) Flange Table - Flange Dimensions

8" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 320mm 280mm 8 M16 18mm 258mm 3mm
PN10 340mm 295mm 8 M20 22mm 268mm 3mm
PN16 340mm 295mm 12 M20 22mm 268mm 3mm
PN25 360mm 310mm 12 M24 26mm 278mm 3mm
PN40 375mm 320mm 12 M27 30mm 285mm 3mm
PN64 415mm 345mm 12 M33 36mm 285mm 3mm
Table D 13 1/4" (337mm) 11 1/2" (292mm) 8 5/8" (16mm) 11/16" (17mm)    
Table E 13 1/4" (337mm) 11 1/2" (292mm) 8 3/4" (19mm) 7/8" (22mm)    
Table F 14 1/2" (368mm) 12 3/4" (324mm) 12 3/4" (19mm) 7/8" (22mm)    
Table H 14 1/2" (368mm) 12 3/4" (324mm) 12 3/4" (19mm) 7/8" (22mm) 10 1/4" (260mm) 1/16" (2mm)
ANSI 125/150 13 1/2" (343mm) 11 3/4" (298mm) 8 3/4" (19mm) 7/8" (22mm) 10 5/8" (270mm) 1/16" (2mm)
ANSI 300 15" (381mm) 13" (330mm) 12 7/8" (22mm) 1" (15mm) 10 5/8" (270mm) 1/16" (2mm)

 

10" NB (DN250) Flange Table - Flange Dimensions

1/2" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 375mm 335mm 12 M16 18mm 312mm 3mm
PN10 395mm 350mm 12 M20 22m 320mm 3mm
PN16 405mm 355mm 12 M24 26mm 320mm 3mm
PN25 425mm 370mm 12 M27 30mm 335mm 3mm
PN40 450mm 385mm 12 M30 33mm 345mm 3mm
PN64 470mm 400mm 12 M33 36mm 345mm 3mm
Table D 16" (406mm) 14" (356mm) 8 3/4" (19mm) 7/8" (22mm)    
Table E 16" (406mm) 14" (356mm) 12 3/4" (19mm) 7/8" (22mm)    
Table F 17" (432mm) 15" (381mm) 12 7/8" (22mm) 1" (25mm)    
Table H 17" (432mm) 15" (381mm) 12 7/8" (22mm) 1" (25mm) 12 1/4" (311mm) 1/16" (2mm)
ANSI 125/150 16" (406mm) 14 1/4" (362mm) 12 7/8" (22mm) 1" (25mm) 12 3/4" (324mm) 1/16" (2mm)
ANSI 300 17 1/2" (445mm) 15 1/4" (387mm) 16 1" (25mm) 1 1/8" (29mm) 12 3/4" (324mm) 1/16" (2mm)

 

12" NB (DN300) Flange Table - Flange Dimensions

12" Flange Diameter PCD No. of Bolt Holes Diameter of Bolts Diameter of Holes Diameter of Raised Face Height of Raised Face
PN6 440mm 395mm 12 M20 22mm 365mm 4mm
PN10 445mm 400mm 12 M20 22mm 370mm 4mm
PN16 460mm 410mm 12 M24 26mm 378mm 4mm
PN25 485mm 430mm 16 M27 30mm 395mm 4mm
PN40 515mm 450mm 16 M30 33mm 410mm 4mm
PN64 530mm 460mm 16 M33 36mm 410mm 4mm
Table D 18" (457mm) 16" (406mm) 12 3/4" (19mm) 7/8" (22mm)    
Table E 18" (457mm) 16" (406mm) 12 7/8" (22mm) 1" (25mm)    
Table F 19 1/4" (489mm) 17 1/4" (438mm) 16 7/8" (22mm) 1" (25mm)    
Table H 19 1/4" (489mm) 17 1/4" (438mm) 16 7/8" (22mm) 1" (25mm) 14 1/4" (362mm) 1/16" (2mm)
ANSI 125/150 19" (483mm) 17" (432mm) 12 7/8" (22mm) 1" (25mm) 15" (381mm) 1/16" (2mm)
ANSI 300 20 1/2" (521mm) 17 3/4" (451mm) 16 1 1/8" (29mm) 1 1/4" (32mm) 15" (381mm) 1/16" (2mm)

 

Please note

Information is subject to alteration and should be used as reference only. Valves Online accept no responsibility for any inaccuracies that occur. For special applications or conditions please click here to contact us using our online form.