Flange Dimensions & Gasket Chart

This flange and gasket reference table has been created to give engineers, specifiers, and maintenance teams a clear, practical guide to common flange standards across the most widely used pressure classes. Rather than separating data by valve size into multiple charts, this single master table allows you to compare ANSI, BS10, and BS4504 flange patterns in one place.

By using the “Valve Size” column, the same structure can be extended from 1/2" / DN15 right through to 24" / DN600, making it easy to scale this reference for any project – from small bore process lines to large diameter transmission systems. Each row details flange diameter, pitch circle diameter (PCD), bolt quantity and size, along with typical gasket thicknesses for cast iron, copper alloy, and steel applications.

This format is designed to reduce errors during specification, ordering, and maintenance, ensuring compatibility between valves, pipework, and gaskets across mixed-standard installations.

Sizes:

DN15 – 1/2" | DN20 – 3/4"DN25 – 1"DN32 – 1¼"DN40 – 1½"DN50 – 2"DN65 – 2½"DN80 – 3"DN100 – 4"DN125 – 5"DN150 – 6"DN200 – 8"DN250 – 10"DN300 – 12"DN400 – 16"DN450 – 18"DN500 – 20"DN600 – 24"

DN15 - 0.5"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
1/2" / DN15 ANSI 125/150 3 1/2" / 89mm 2 3/8" / 60mm 4 1/2" 5/16" / 8mm 7/16" / 8mm
1/2" / DN15 ANSI 300 3 3/4" / 95mm 2 5/8" / 67mm 4 1/2" 1/2" / 13mm 1/2" / 13mm
1/2" / DN15 ANSI 600 3 3/4" / 95mm 2 5/8" / 67mm 4 1/2" 9/16" / 14mm
1/2" / DN15 ANSI 900 4 3/4" / 121mm 3 1/4" / 83mm 4 3/4" 7/8" / 22mm
1/2" / DN15 ANSI 1500 4 3/4" / 121mm 3 1/4" / 83mm 4 3/4" 7/8" / 22mm
1/2" / DN15 ANSI 2500 5 1/4" / 133mm 3 1/2" / 89mm 4 3/4" 1 1/8" / 30mm
1/2" / DN15 BS10 Table D 3 3/4" / 95mm 2 5/8" / 67mm 4 1/2" 1/2" / 13mm 1/4" / 6mm 3/8" / 10mm
1/2" / DN15 BS10 Table E 3 3/4" / 95mm 2 5/8" / 67mm 4 1/2" 1/2" / 13mm 1/4" / 6mm 3/8" / 10mm
1/2" / DN15 BS10 Table F 3 3/4" / 95mm 2 5/8" / 67mm 4 1/2" 1/2" / 13mm 5/16" / 8mm 3/8" / 10mm
1/2" / DN15 BS10 Table H 4 1/2" / 114mm 3 1/4" / 83mm 4 5/8" 5/8" / 16mm 3/8" / 10mm 1/2" / 13mm
1/2" / DN15 BS10 Table J 4 1/2" / 114mm 3 1/4" / 83mm 4 5/8" 5/8" / 16mm 5/8" / 16mm
1/2" / DN15 BS10 Table K 4 1/2" / 114mm 3 1/4" / 83mm 4 5/8" 3/4" / 19mm 3/4" / 19mm
1/2" / DN15 BS4504-PN6 80mm 55mm 4 M10 12mm
1/2" / DN15 BS4504-PN10 95mm 65mm 4 M12 14mm
1/2" / DN15 BS4504-PN16 95mm 65mm 4 M12 14mm
1/2" / DN15 BS4504-PN25 95mm 65mm 4 M12 16mm 8mm 16mm
1/2" / DN15 BS4504-PN40 95mm 65mm 4 M12 9mm 16mm
1/2" / DN15 BS4504-PN64 105mm 75mm 4 M12 20mm
1/2" / DN15 BS4504-PN100 105mm 75mm 4 M12 20mm

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DN20 - 0.75"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
3/4" / DN20 ANSI 125/150 3 7/8" / 98mm 2 3/4" / 70mm 4 1/2" 11/32" / 9mm 9/16" / 14mm
3/4" / DN20 ANSI 300 4 5/8" / 117mm 3 1/4" / 83mm 4 5/8" 17/32" / 13mm 5/8" / 16mm
3/4" / DN20 ANSI 600 4 5/8" / 117mm 3 1/4" / 83mm 4 5/8" 5/8" / 16mm
3/4" / DN20 ANSI 900 5 1/8" / 130mm 3 1/2" / 89mm 4 3/4" 1" / 25mm
3/4" / DN20 ANSI 1500 5 1/8" / 130mm 3 1/2" / 89mm 4 3/4" 1" / 25mm
3/4" / DN20 ANSI 2500 5 1/2" / 140mm 3 3/4" / 95mm 4 3/4" 1 1/4" / 32mm
3/4" / DN20 BS10 Table D 4" / 102mm 2 7/8" / 73mm 4 1/2" 1/2" / 13mm 1/4" / 6mm 3/8" / 10mm
3/4" / DN20 BS10 Table E 4" / 102mm 2 7/8" / 73mm 4 1/2" 1/2" / 13mm 1/4" / 6mm 3/8" / 10mm
3/4" / DN20 BS10 Table F 4" / 102mm 2 7/8" / 73mm 4 1/2" 1/2" / 13mm 5/16" / 8mm 3/8" / 10mm
3/4" / DN20 BS10 Table H 4 1/2" / 114mm 3 1/4" / 83mm 4 5/8" 5/8" / 16mm 3/8" / 10mm 1/2" / 13mm
3/4" / DN20 BS10 Table J 4 1/2" / 114mm 3 1/4" / 83mm 4 5/8" 5/8" / 16mm 5/8" / 16mm
3/4" / DN20 BS10 Table K 4 1/2" / 114mm 3 1/4" / 83mm 4 5/8" 3/4" / 19mm 3/4" / 19mm
3/4" / DN20 BS4504-PN6 90mm 65mm 4 M10 14mm
3/4" / DN20 BS4504-PN10 105mm 75mm 4 M12 16mm
3/4" / DN20 BS4504-PN16 105mm 75mm 4 M12 16mm 6mm 18mm
3/4" / DN20 BS4504-PN25 105mm 75mm 4 M12 18mm 8mm 18mm
3/4" / DN20 BS4504-PN40 105mm 75mm 4 M12 9mm 18mm
3/4" / DN20 BS4504-PN64 130mm 90mm 4 M16 22mm
3/4" / DN20 BS4504-PN100 130mm 90mm 4 M16 22mm

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DN25 - 1"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
1" / DN25 ANSI 125/150 4 1/4" / 108mm 3 1/8" / 79mm 4 1/2" 7/16" / 11mm 3/8" / 10mm 7/16" / 11mm
1" / DN25 ANSI 300 4 7/8" / 124mm 3 1/2" / 89mm 4 5/8" 19/32" / 15mm 11/16" / 17mm
1" / DN25 ANSI 600 4 7/8" / 124mm 3 1/2" / 89mm 4 5/8" 11/16" / 17mm
1" / DN25 ANSI 900 5 7/8" / 149mm 4" / 102mm 4 7/8" 1 1/8" / 29mm
1" / DN25 ANSI 1500 5 7/8" / 149mm 4" / 102mm 4 7/8" 1 1/8" / 29mm
1" / DN25 ANSI 2500 6 1/4" / 159mm 4 1/4" / 108mm 4 7/8" 1 3/8" / 35mm
1" / DN25 BS10 Table D 4 1/2" / 114mm 3 1/4" / 83mm 4 1/2" 1/2" / 13mm 5/16" / 8mm 3/8" / 10mm
1" / DN25 BS10 Table E 4 1/2" / 114mm 3 1/4" / 83mm 4 1/2" 1/2" / 13mm 5/16" / 8mm 3/8" / 10mm
1" / DN25 BS10 Table F 4 3/4" / 121mm 3 7/16" / 87mm 4 5/8" 1/2" / 13mm 3/8" / 10mm 3/8" / 10mm
1" / DN25 BS10 Table H 4 3/4" / 121mm 3 7/16" / 87mm 4 5/8" 3/4" / 19mm 7/16" / 11mm 9/16" / 14mm
1" / DN25 BS10 Table J 4 3/4" / 121mm 3 7/16" / 87mm 4 5/8" 3/4" / 19mm 3/4" / 19mm
1" / DN25 BS10 Table K 5" / 127mm 3 3/4" / 95mm 4 5/8" 7/8" / 22mm 7/8" / 22mm
1" / DN25 BS4504-PN6 100mm 75mm 4 M10 14mm
1" / DN25 BS4504-PN10 115mm 85mm 4 M12 16mm
1" / DN25 BS4504-PN16 115mm 85mm 4 M12 16mm 8mm 18mm
1" / DN25 BS4504-PN25 115mm 85mm 4 M12 18mm 9mm 18mm
1" / DN25 BS4504-PN40 115mm 85mm 4 M12 11mm 18mm
1" / DN25 BS4504-PN64 140mm 100mm 4 M16 24mm
1" / DN25 BS4504-PN100 140mm 100mm 4 M16 24mm

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DN32 - 1.25"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
1¼" / DN32 ANSI 125/150 4 5/8" / 117mm 3 1/2" / 89mm 4 1/2" 1/2" / 13mm 13/32" / 10mm 1/2" / 13mm
1¼" / DN32 ANSI 300 5 1/4" / 133mm 3 7/8" / 98mm 4 5/8" 5/8" / 16mm 3/4" / 19mm
1¼" / DN32 ANSI 600 5 1/4" / 133mm 3 7/8" / 98mm 4 5/8" 13/16" / 21mm
1¼" / DN32 ANSI 900 6 1/4" / 159mm 4 3/8" / 111mm 4 7/8" 1 1/8" / 29mm
1¼" / DN32 ANSI 1500 6 1/4" / 159mm 4 3/8" / 111mm 4 7/8" 1 1/8" / 29mm
1¼" / DN32 ANSI 2500 7 1/4" / 184mm 5 1/8" / 130mm 4 1" 1 1/2" / 38mm
1¼" / DN32 BS10 Table D 4 3/4" / 121mm 3 7/16" / 87mm 4 1/2" 5/8" / 16mm 5/16" / 8mm 1/2" / 13mm
1¼" / DN32 BS10 Table E 4 3/4" / 121mm 3 7/16" / 87mm 4 1/2" 5/8" / 16mm 5/16" / 8mm 1/2" / 13mm
1¼" / DN32 BS10 Table F 5 1/4" / 133mm 3 7/8" / 98mm 4 5/8" 5/8" / 16mm 3/8" / 10mm 1/2" / 13mm
1¼" / DN32 BS10 Table H 5 1/4" / 133mm 3 7/8" / 98mm 4 5/8" 7/8" / 22mm 7/16" / 11mm 11/16" / 17mm
1¼" / DN32 BS10 Table J 5 1/4" / 133mm 3 7/8" / 98mm 4 5/8" 3/4" / 19mm 3/4" / 19mm
1¼" / DN32 BS10 Table K 5 1/4" / 133mm 3 7/8" / 98mm 4 5/8" 7/8" / 22mm 7/8" / 22mm
1¼" / DN32 BS4504-PN6 120mm 90mm 4 M12 16mm
1¼" / DN32 BS4504-PN10 140mm 100mm 4 M16 18mm
1¼" / DN32 BS4504-PN16 140mm 100mm 4 M16 18mm 8mm 18mm
1¼" / DN32 BS4504-PN25 140mm 100mm 4 M16 20mm 9mm 18mm
1¼" / DN32 BS4504-PN40 140mm 100mm 4 M16 11mm 18mm
1¼" / DN32 BS4504-PN64 155mm 110mm 4 M20 26mm
1¼" / DN32 BS4504-PN100 155mm 110mm 4 M20 26mmV

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DN40 - 1.5"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
1½" / DN40 ANSI 125/150 5" / 127mm 3 7/8" / 98mm 4 1/2" 9/16" / 14mm 7/16" / 11mm 9/16" / 14mm
1½" / DN40 ANSI 300 6 1/8" / 156mm 4 1/2" / 114mm 4 3/4" 11/16" / 17mm 13/16" / 21mm
1½" / DN40 ANSI 600 6 1/8" / 156mm 4 1/2" / 114mm 4 3/4" 7/8" / 22mm
1½" / DN40 ANSI 900 7" / 178mm 4 7/8" / 124mm 4 1" 1 1/4" / 32mm
1½" / DN40 ANSI 1500 7" / 178mm 4 7/8" / 124mm 4 1" 1 1/4" / 32mm
1½" / DN40 ANSI 2500 8" / 203mm 5 3/4" / 146mm 4 1 1/8" 1 3/4" / 45mm
1½" / DN40 BS10 Table D 5 1/4" / 133mm 3 7/8" / 98mm 4 1/2" 5/8" / 16mm 3/8" / 10mm 1/2" / 13mm
1½" / DN40 BS10 Table E 5 1/4" / 133mm 3 7/8" / 98mm 4 1/2" 5/8" / 16mm 3/8" / 10mm 1/2" / 13mm
1½" / DN40 BS10 Table F 5 1/2" / 140mm 4 1/8" / 105mm 4 5/8" 5/8" / 16mm 7/16" / 11mm 1/2" / 13mm
1½" / DN40 BS10 Table H 5 1/2" / 140mm 4 1/8" / 105mm 4 5/8" 7/8" / 22mm 1/2" / 13mm 11/16" / 17mm
1½" / DN40 BS10 Table J 5 1/2" / 140mm 4 1/8" / 105mm 4 5/8" 7/8" / 22mm 7/8" / 22mm
1½" / DN40 BS10 Table K 6" / 152mm 4 1/2" / 114mm 4 3/4" 1" / 25mm 1" / 25mm
1½" / DN40 BS4504-PN6 130mm 100mm 4 M12 16mm
1½" / DN40 BS4504-PN10 150mm 110mm 4 M16 18mm
1½" / DN40 BS4504-PN16 150mm 110mm 4 M16 18mm 9mm 18mm
1½" / DN40 BS4504-PN25 150mm 110mm 4 M16 20mm 11mm 18mm
1½" / DN40 BS4504-PN40 150mm 110mm 4 M16 13mm 18mm
1½" / DN40 BS4504-PN64 170mm 125mm 4 M20 28mm
1½" / DN40 BS4504-PN100 170mm 125mm 4 M20 28mm

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DN50 - 2"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
2" / DN50 ANSI 125/150 6" / 152mm 4 3/4" / 121mm 4 5/8" 5/8" / 16mm 1/2" / 13mm 5/8" / 16mm
2" / DN50 ANSI 300 6 1/2" / 165mm 5" / 127mm 8 5/8" 3/4" / 19mm 7/8" / 22mm
2" / DN50 ANSI 600 6 1/2" / 165mm 5" / 127mm 8 5/8" 1" / 25mm
2" / DN50 ANSI 900 8 1/2" / 216mm 6 1/2" / 165mm 8 7/8" 1 1/2" / 38mm
2" / DN50 ANSI 1500 8 1/2" / 216mm 6 1/2" / 165mm 8 7/8" 1 1/2" / 38mm
2" / DN50 ANSI 2500 9 1/4" / 235mm 6 3/4" / 171mm 8 1" 2" / 51mm
2" / DN50 BS10 Table D 6" / 152mm 4 1/2" / 114mm 4 5/8" 11/16" / 17mm 3/8" / 10mm 9/16" / 14mm
2" / DN50 BS10 Table E 6" / 152mm 4 1/2" / 114mm 4 5/8" 3/4" / 19mm 3/8" / 10mm 9/16" / 14mm
2" / DN50 BS10 Table F 6 1/2" / 165mm 5" / 127mm 4 5/8" 3/4" / 19mm 7/16" / 11mm 5/8" / 16mm
2" / DN50 BS10 Table H 6 1/2" / 165mm 5" / 127mm 4 5/8" 1" / 25mm 1/2" / 13mm 3/4" / 19mm
2" / DN50 BS10 Table J 6 1/2" / 165mm 5" / 127mm 4 3/4" 1" / 25mm 1" / 25mm
2" / DN50 BS10 Table K 6 1/2" / 165mm 5" / 127mm 8 5/8" 1" / 25mm 1" / 25mm
2" / DN50 BS4504-PN6 140mm 110mm 4 M12 16mm
2" / DN50 BS4504-PN10 165mm 125mm 4 M16 20mm
2" / DN50 BS4504-PN16 165mm 125mm 4 M16 20mm 11mm 20mm
2" / DN50 BS4504-PN25 165mm 125mm 4 M16 22mm 11mm 20mm
2" / DN50 BS4504-PN40 165mm 125mm 4 M16 13mm 20mm
2" / DN50 BS4504-PN64 180mm 135mm 4 M20 26mm
2" / DN50 BS4504-PN100 195mm 145mm 4 M24 30mm

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DN65 - 2.5"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
2½" / DN65 ANSI 125/150 7" / 178mm 5 1/2" / 140mm 4 5/8" 11/16" / 17mm 9/16" / 14mm 11/16" / 17mm
2½" / DN65 ANSI 300 7 1/2" / 191mm 5 7/8" / 149mm 8 3/4" 13/16" / 21mm 1" / 25mm
2½" / DN65 ANSI 600 7 1/2" / 191mm 5 7/8" / 149mm 8 3/4" 1 1/8" / 29mm
2½" / DN65 ANSI 900 9 5/8" / 244mm 7 1/2" / 191mm 8 1" 1 5/8" / 41mm
2½" / DN65 ANSI 1500 9 5/8" / 244mm 7 1/2" / 191mm 8 1" 1 5/8" / 41mm
2½" / DN65 ANSI 2500 10 1/2" / 267mm 7 3/4" / 197mm 8 1 1/8" 2 1/4" / 57mm
2½" / DN65 BS10 Table D 6 1/2" / 165mm 5" / 127mm 4 5/8" 11/16" / 17mm 7/16" / 11mm 9/16" / 14mm
2½" / DN65 BS10 Table E 6 1/2" / 165mm 5" / 127mm 4 5/8" 3/4" / 19mm 7/16" / 11mm 9/16" / 14mm
2½" / DN65 BS10 Table F 7 1/4" / 184mm 5 3/4" / 146mm 8 5/8" 3/4" / 19mm 1/2" / 13mm 5/8" / 16mm
2½" / DN65 BS10 Table H 7 1/4" / 184mm 5 3/4" / 146mm 8 5/8" 1" / 25mm 9/16" / 14mm 3/4" / 19mm
2½" / DN65 BS10 Table J 7 1/4" / 184mm 5 3/4" / 146mm 8 3/4" 1" / 25mm 1" / 25mm
2½" / DN65 BS10 Table K 7 1/4" / 184mm 5 3/4" / 146mm 8 3/4" 1 1/8" / 29mm 1 1/8" / 29mm
2½" / DN65 BS4504-PN6 160mm 130mm 4 M12 16mm
2½" / DN65 BS4504-PN10 185mm 145mm 4 M16 20mm

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DN80 - 3"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
3" / DN80 ANSI 125/150 7 1/2" / 191mm 6" / 152mm 4 5/8" 3/4" / 19mm 5/8" / 16mm 3/4" / 19mm
3" / DN80 ANSI 300 8 1/4" / 210mm 6 5/8" / 168mm 8 3/4" 29/32" / 23mm 1 1/8" / 29mm
3" / DN80 ANSI 600 8 1/4" / 210mm 6 5/8" / 168mm 8 3/4" 1 1/4" / 32mm
3" / DN80 ANSI 900 9 1/2" / 241mm 7 1/2" / 192mm 8 7/8" 1 1/2" / 38mm
3" / DN80 ANSI 1500 10 1/2" / 267mm 8" / 203mm 8 1 1/8" 1 7/8" / 48mm
3" / DN80 ANSI 2500 9" / 229mm 7 3/4" / 197mm 8 1 1/4" 2 5/8" / 67mm
3" / DN80 BS10 Table D 7 1/4" / 184mm 5 3/4" / 146mm 4 5/8" 3/4" / 19mm 1/2" / 13mm 9/16" / 14mm
3" / DN80 BS10 Table E 7 1/4" / 184mm 5 3/4" / 146mm 4 5/8" 3/4" / 19mm 1/2" / 13mm 9/16" / 14mm
3" / DN80 BS10 Table F 8" / 203mm 6 1/2" / 165mm 8 5/8" 3/4" / 19mm 9/16" / 14mm 5/8" / 16mm
3" / DN80 BS10 Table H 8" / 203mm 6 1/2" / 165mm 8 5/8" 1 1/8" / 29mm 5/8" / 16mm 7/8" / 22mm
3" / DN80 BS10 Table J 8" / 203mm 6 1/2" / 165mm 8 3/4" 1 1/4" / 32mm 1 1/4" / 32mm
3" / DN80 BS10 Table K 8" / 203mm 6 1/2" / 165mm 8 3/4" 1 1/4" / 32mm 1 1/4" / 32mm
3" / DN80 BS4504-PN6 190mm 150mm 4 M16 18mm
3" / DN80 BS4504-PN10 200mm 160mm 8 M16 22mm
3" / DN80 BS4504-PN16 200mm 160mm 8 M16 22mm 13mm 20mm
3" / DN80 BS4504-PN25 200mm 160mm 8 M16 26mm 14mm 24mm
3" / DN80 BS4504-PN40 200mm 160mm 8 M16 16mm 24mm
3" / DN80 BS4504-PN64 215mm 170mm 8 M20 28mm
3" / DN80 BS4504-PN100 230mm 180mm 8 M24 36mm

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DN100 - 4"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
4" / DN100 ANSI 125/150 9" / 229mm 7 1/2" / 191mm 8 5/8" 15/16" / 24mm 11/16" / 17mm 15/16" / 24mm
4" / DN100 ANSI 300 10" / 254mm 7 7/8" / 200mm 8 3/4" 1 1/16" / 27mm 1 1/4" / 32mm
4" / DN100 ANSI 600 10 3/4" / 273mm 8 1/2" / 216mm 8 7/8" 1 1/2" / 38mm
4" / DN100 ANSI 900 11 1/2" / 292mm 9 1/4" / 235mm 8 1 1/8" 1 3/4" / 44mm
4" / DN100 ANSI 1500 12 1/4" / 311mm 9 1/2" / 241mm 8 1 1/4" 2 1/8" / 54mm
4" / DN100 ANSI 2500 14" / 356mm 10 3/4" / 273mm 8 1 1/2" 3" / 76mm
4" / DN100 BS10 Table D 8 1/2" / 216mm 7" / 178mm 4 5/8" 3/4" / 19mm 5/8" / 16mm 11/16" / 17mm
4" / DN100 BS10 Table E 8 1/2" / 216mm 7" / 178mm 8 5/8" 7/8" / 22mm 5/8" / 16mm 11/16" / 17mm
4" / DN100 BS10 Table F 9" / 229mm 7 1/2" / 191mm 8 5/8" 7/8" / 22mm 11/16" / 17mm 3/4" / 19mm
4" / DN100 BS10 Table H 9" / 229mm 7 1/2" / 191mm 8 5/8" 1 1/4" / 32mm 3/4" / 19mm 1" / 25mm
4" / DN100 BS10 Table J 9" / 229mm 7 1/2" / 191mm 8 3/4" 1 3/8" / 35mm 1 3/8" / 35mm
4" / DN100 BS10 Table K 9 1/2" / 241mm 7 3/4" / 197mm 8 7/8" 1 3/8" / 35mm 1 3/8" / 35mm
4" / DN100 BS4504-PN6 210mm 170mm 4 M16 18mm
4" / DN100 BS4504-PN10 220mm 180mm 8 M16 24mm
4" / DN100 BS4504-PN16 220mm 180mm 8 M16 24mm 16mm 20mm
4" / DN100 BS4504-PN25 235mm 190mm 8 M20 28mm 17mm 24mm
4" / DN100 BS4504-PN40 235mm 190mm 8 M20 19mm 24mm
4" / DN100 BS4504-PN64 250mm 200mm 8 M24 30mm
4" / DN100 BS4504-PN100 265mm 210mm 8 M27 40mm

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DN125 - 5"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
5" / DN125 ANSI 125/150 10" / 254mm 8 1/2" / 216mm 8 3/4" 15/16" / 24mm 3/4" / 19mm 15/16" / 24mm
5" / DN125 ANSI 300 11" / 279mm 9 1/4" / 235mm 8 3/4" 1 1/8" / 29mm 1 3/8" / 35mm
5" / DN125 ANSI 600 13" / 330mm 10 1/2" / 267mm 8 1" 1 3/4" / 44mm
5" / DN125 ANSI 900 13 3/4" / 349mm 11" / 279mm 8 1 1/4" 2" / 51mm
5" / DN125 ANSI 1500 14 3/4" / 375mm 11 1/2" / 292mm 8 1 1/2" 2 7/8" / 73mm
5" / DN125 ANSI 2500 16 1/2" / 419mm 12 3/4" / 324mm 8 1 3/4" 3 5/8" / 98mm
5" / DN125 BS10 Table D 10" / 254mm 8 1/4" / 210mm 4 5/8" 13/16" / 21mm 11/16" / 17mm 11/16" / 17mm
5" / DN125 BS10 Table E 10" / 254mm 8 1/4" / 210mm 8 5/8" 7/8" / 22mm 11/16" / 17mm 11/16" / 17mm
5" / DN125 BS10 Table F 11" / 279mm 9 1/4" / 235mm 8 3/4" 1" / 25mm 3/4" / 19mm 7/8" / 22mm
5" / DN125 BS10 Table H 11" / 279mm 9 1/4" / 235mm 8 3/4" 1 3/8" / 35mm 7/8" / 22mm 1 1/8" / 29mm
5" / DN125 BS10 Table J 11" / 279mm 9 1/4" / 235mm 8 7/8" 1 1/2" / 38mm 1 1/2" / 38mm
5" / DN125 BS10 Table K 11" / 279mm 9 1/4" / 235mm 12 7/8" 1 5/8" / 41mm 1 5/8" / 41mm
5" / DN125 BS4504-PN6 240mm 200mm 8 M16 20mm
5" / DN125 BS4504-PN10 250mm 210mm 8 M16 26mm
5" / DN125 BS4504-PN16 250mm 210mm 8 M16 26mm 22mm
5" / DN125 BS4504-PN25 270mm 220mm 8 M24 30mm 26mm
5" / DN125 BS4504-PN40 270mm 220mm 8 M24 26mm
5" / DN125 BS4504-PN64 295mm 240mm 8 M27 34mm
5" / DN125 BS4504-PN100 315mm 250mm 8 M30 40mm

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DN150 - 6"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
6" / DN150 ANSI 125/150 11" / 279mm 9 1/2" / 241mm 8 3/4" 1" / 25mm 13/16" / 21mm 1" / 25mm
6" / DN150 ANSI 300 12 1/2" / 318mm 10 5/8" / 270mm 12 3/4" 1 3/16" / 30mm 1 7/16" / 37mm
6" / DN150 ANSI 600 14" / 356mm 11 1/2" / 292mm 12 1" 1 7/8" / 48mm
6" / DN150 ANSI 900 15" / 381mm 12 1/2" / 318mm 12 1 1/8" 2 3/16" / 56mm
6" / DN150 ANSI 1500 15 1/2" / 394mm 12 1/2" / 318mm 12 1 3/8" 3 1/4" / 83mm
6" / DN150 ANSI 2500 19" / 483mm 14 1/2" / 368mm 8 2" 4 1/4" / 108mm
6" / DN150 BS10 Table D 11" / 279mm 9 1/4" / 235mm 8 5/8" 13/16" / 21mm 11/16" / 17mm 11/16" / 17mm
6" / DN150 BS10 Table E 11" / 279mm 9 1/4" / 235mm 8 3/4" 7/8" / 22mm 11/16" / 17mm 11/16" / 17mm
6" / DN150 BS10 Table F 12" / 305mm 10 1/4" / 260mm 12 3/4" 1" / 25mm 7/8" / 22mm 7/8" / 22mm
6" / DN150 BS10 Table H 12" / 305mm 10 1/4" / 260mm 12 3/4" 1 3/8" / 35mm 1" / 25mm 1 1/8" / 29mm
6" / DN150 BS10 Table J 12" / 305mm 10 1/4" / 260mm 12 7/8" 1 1/2" / 38mm 1 1/2" / 38mm
6" / DN150 BS10 Table K 12" / 305mm 10 1/4" / 260mm 12 7/8" 1 5/8" / 41mm 1 5/8" / 41mm
6" / DN150 BS4504-PN6 265mm 225mm 8 M16 20mm
6" / DN150 BS4504-PN10 285mm 240mm 8 M20 26mm
6" / DN150 BS4504-PN16 285mm 240mm 8 M20 26mm 22mm
6" / DN150 BS4504-PN25 300mm 250mm 8 M24 34mm 28mm
6" / DN150 BS4504-PN40 300mm 250mm 8 M24 28mm
6" / DN150 BS4504-PN64 345mm 280mm 8 M30 36mm
6" / DN150 BS4504-PN100 355mm 290mm 12 M30 44mm

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DN200 - 8"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
8" / DN200 ANSI 125/150 13 1/2" / 343mm 11 3/4" / 298mm 8 3/4" 1 1/8" / 29mm 15/16" / 24mm 1 1/8" / 29mm
8" / DN200 ANSI 300 15" / 381mm 13" / 330mm 12 7/8" 1 3/8" / 35mm 1 5/8" / 41mm
8" / DN200 ANSI 600 16 1/2" / 419mm 13 3/4" / 349mm 12 1 1/8" 2 3/16" / 56mm
8" / DN200 ANSI 900 18 1/2" / 470mm 15 1/2" / 394mm 12 1 3/8" 2 1/2" / 64mm
8" / DN200 ANSI 1500 19" / 483mm 15 1/2" / 394mm 12 1 5/8" 3 5/8" / 92mm
8" / DN200 ANSI 2500 21 3/4" / 552.5mm 17 1/4" / 438mm 12 2" 5" / 127mm
8" / DN200 BS10 Table D 13 1/4" / 337mm 11 1/2" / 292mm 8 5/8" 7/8" / 22mm 3/4" / 19mm 3/4" / 19mm
8" / DN200 BS10 Table E 13 1/4" / 337mm 11 1/2" / 292mm 8 3/4" 1" / 25mm 3/4" / 19mm 3/4" / 19mm
8" / DN200 BS10 Table F 14 1/2" / 368mm 12 3/4" / 324mm 12 3/4" 1 1/8" / 29mm 1" / 25mm 1" / 25mm
8" / DN200 BS10 Table H 14 1/2" / 368mm 12 3/4" / 324mm 12 3/4" 1 1/2" / 38mm 1 1/4" / 32mm 1 1/4" / 32mm
8" / DN200 BS10 Table J 14 1/2" / 368mm 12 3/4" / 324mm 12 7/8" 1 5/8" / 41mm 1 5/8" / 41mm
8" / DN200 BS10 Table K 14 1/2" / 368mm 12 1/2" / 318mm 12 1" 1 7/8" / 48mm 1 7/8" / 48mm
8" / DN200 BS4504-PN6 320mm 280mm 8 M16 22mm
8" / DN200 BS4504-PN10 340mm 295mm 8 M20 26mm
8" / DN200 BS4504-PN16 340mm 295mm 12 M20 30mm 24mm
8" / DN200 BS4504-PN25 360mm 310mm 12 M24 34mm 30mm
8" / DN200 BS4504-PN40 375mm 320mm 12 M27 34mm
8" / DN200 BS4504-PN64 415mm 345mm 12 M33 42mm
8" / DN200 BS4504-PN100 430mm 360mm 12 M33 52mm

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DN250 - 10"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
10" / DN250 ANSI 125/150 16" / 406mm 14 1/4" / 362mm 12 7/8" 1 3/16" / 30mm 1" / 25mm 1 3/16" / 30mm
10" / DN250 ANSI 300 17 1/2" / 445mm 15 1/4" / 387mm 16 1" 1 7/8" / 48mm
10" / DN250 ANSI 600 20" / 508mm 17" / 432mm 16 1 1/4" 2 1/2" / 64mm
10" / DN250 ANSI 900 21 1/2" / 546mm 18 1/2" / 470mm 16 1 3/8" 2 3/4" / 70mm
10" / DN250 ANSI 1500 23" / 584mm 19" / 483mm 12 1 7/8" 4 1/4" / 108mm
10" / DN250 ANSI 2500 26 1/2" / 673mm 21 1/4" / 540mm 12 2 1/2" 6 1/2" / 165mm
10" / DN250 BS10 Table D 16" / 406mm 14" / 356mm 8 3/4" 1" / 25mm 3/4" / 19mm 3/4" / 19mm
10" / DN250 BS10 Table E 16" / 406mm 14" / 356mm 12 3/4" 1" / 25mm 7/8" / 22mm 7/8" / 22mm
10" / DN250 BS10 Table F 17" / 432mm 15" / 381mm 12 7/8" 1 1/8" / 29mm 1" / 25mm 1" / 25mm
10" / DN250 BS10 Table H 17" / 432mm 15" / 381mm 12 7/8" 1 5/8" / 41mm 1 3/8" / 35mm 1 3/8" / 35mm
10" / DN250 BS10 Table J 17" / 432mm 15" / 381mm 12 1" 1 7/8" / 48mm
10" / DN250 BS10 Table K 17" / 432mm 15" / 381mm 16 1" 2" / 51mm
10" / DN250 BS4504-PN6 375mm 335mm 12 M16 24mm
10" / DN250 BS4504-PN10 395mm 350mm 12 M20 28mm
10" / DN250 BS4504-PN16 405mm 355mm 12 M24 32mm 26mm
10" / DN250 BS4504-PN25 425mm 370mm 12 M27 36mm 32mm
10" / DN250 BS4504-PN40 450mm 385mm 12 M30 38mm
10" / DN250 BS4504-PN64 470mm 400mm 12 M33 46mm
10" / DN250 BS4504-PN100 505mm 430mm 12 M36 60mm

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DN300 - 12"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
12" / DN300 ANSI 125/150 19" / 483mm 17" / 432mm 12 7/8" 1 1/4" / 32mm 1 1/16" / 27mm 1 1/4" / 32mm
12" / DN300 ANSI 300 20 1/2" / 521mm 17 3/4" / 451mm 16 1 1/8" 2" / 51mm
12" / DN300 ANSI 600 22" / 559mm 19 1/4" / 489mm 20 1 1/4" 2 5/8" / 67mm
12" / DN300 ANSI 900 24" / 610mm 21" / 533mm 20 1 3/8" 3 1/8" / 79mm
12" / DN300 ANSI 1500 26 1/2" / 673mm 22 1/2" / 572mm 16 2" 4 7/8" / 124mm
12" / DN300 ANSI 2500 30" / 762.1mm 24 3/8" / 619mm 12 2 3/4" 7 1/4" / 184mm
12" / DN300 BS10 Table D 18" / 457mm 16" / 406mm 12 3/4" 1" / 25mm 7/8" / 22mm 7/8" / 22mm
12" / DN300 BS10 Table E 18" / 457mm 16" / 406mm 12 7/8" 1 1/8" / 29mm 1" / 25mm 1" / 25mm
12" / DN300 BS10 Table F 19 1/4" / 489mm 17 1/4" / 438mm 16 7/8" 1 1/4" / 32mm 1 1/8" / 29mm 1 1/8" / 29mm
12" / DN300 BS10 Table H 19 1/4" / 489mm 17 1/4" / 438mm 16 7/8" 1 3/4" / 44mm 1 1/2" / 38mm 1 1/2" / 38mm
12" / DN300 BS10 Table J 19 1/4" / 489mm 17 1/4" / 438mm 16 1" 2" / 51mm
12" / DN300 BS10 Table K 19 1/4" / 489mm 17" / 432mm 16 1 1/8" 2 1/4" / 57mm
12" / DN300 BS4504-PN6 440mm 395mm 12 M20 24mm
12" / DN300 BS4504-PN10 445mm 400mm 12 M20 28mm
12" / DN300 BS4504-PN16 460mm 410mm 12 M24 32mm 28mm
12" / DN300 BS4504-PN25 485mm 430mm 16 M27 40mm 34mm
12" / DN300 BS4504-PN40 515mm 450mm 16 M30 42mm
12" / DN300 BS4504-PN64 530mm 460mm 16 M33 52mm
12" / DN300 BS4504-PN100 585mm 500mm 16 M39 68mm

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DN350 - 14"

Class
Size
Flange
Diameter
PCD
Number
of Bolts
Bolt
Size
Thickness
Cast Iron
Thickness
Copper Alloy
Thickness
Steel
ANSI 125/150
14" / DN350
21" / 533mm
18 3/4" / 476mm
12
1"
1 3/8" / 35mm
1 3/8" / 35mm
ANSI 300
14" / DN350
23" / 584mm
20 1/4" / 514mm
20
1 1/8"
2 1/8" / 54mm
ANSI 600
14" / DN350
23 3/4" / 603mm
20 3/4" / 527mm
20
1 3/8"
2 3/4" / 70mm
ANSI 900
14" / DN350
25 1/4" / 641mm
22" / 559mm
20
1 1/2"
3 3/8" / 86mm
ANSI 1500
14" / DN350
29 1/2" / 749mm
25" / 635mm
16
2 1/4"
5 1/4" / 133mm
BS10 Table D
14" / DN350
20 3/4" / 527mm
18 1/2" / 470mm
12
7/8" / 22mm
1 1/8" / 29mm
1" / 25mm
1" / 25mm
BS10 Table E
14" / DN350
20 3/4" / 527mm
18 1/2" / 470mm
12
7/8" / 22mm
1 1/4" / 32mm
1" / 25mm
1" / 25mm
BS10 Table F
14" / DN350
21 3/4" / 552mm
19 1/2" / 495mm
16
1"
1 3/8" / 35mm
1 1/4" / 32mm
1 1/4" / 32mm
BS10 Table H
14" / DN350
21 3/4" / 552mm
19 1/2" / 495mm
16
1"
1 7/8" / 48mm
1 5/8" / 41mm
1 5/8" / 41mm
BS10 Table J
14" / DN350
21 3/4" / 552mm
19 1/2" / 495mm
16
1 1/8"
2 1/8" / 54mm
BS10 Table K
14" / DN350
22 1/2" / 572mm
20" / 508mm
16
1 1/4"
2 3/8" / 60mm
BS4504-PN6
14" / DN350
490mm
445mm
12
M20
26mm
BS4504-PN10
14" / DN350
505mm
460mm
16
M20
30mm
BS4504-PN16
14" / DN350
520mm
470mm
16
M24
36mm
30mm
BS4504-PN25
14" / DN350
555mm
490mm
16
M30
44mm
38mm
BS4504-PN40
14" / DN350
580mm
510mm
16
M33
46mm
BS4504-PN64
14" / DN350
600mm
525mm
16
M36
56mm
BS4504-PN100
14" / DN350
655mm
560mm
16
M45
74mm

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DN400 - 16"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
16" / DN400 ANSI 125/150 23 1/2" / 597mm 21 1/4" / 540mm 16 1" 1 7/16" / 37mm 1 7/16" / 37mm
16" / DN400 ANSI 300 25 1/2" / 648mm 22 1/2" / 572mm 20 1 1/4" 2 1/4" / 57mm
16" / DN400 ANSI 600 27" / 686mm 23 3/4" / 603mm 20 1 1/2" 3" / 76mm
16" / DN400 ANSI 900 27 3/4" / 705mm 24 1/4" / 616mm 20 1 5/8" 3 1/2" / 89mm
16" / DN400 ANSI 1500 32 1/2" / 826mm 27 3/4" / 705mm 16 2 1/2" 5 3/4" / 146mm
16" / DN400 BS10 Table D 22 3/4" / 578mm 20 1/2" / 521mm 12 7/8" 1 1/8" / 29mm 1" / 25mm 1" / 25mm
16" / DN400 BS10 Table E 22 3/4" / 578mm 20 1/2" / 521mm 12 7/8" 1 1/4" / 32mm 1" / 25mm 1" / 25mm
16" / DN400 BS10 Table F 24" / 610mm 21 3/4" / 552mm 20 1" 1 3/8" / 35mm 1 1/4" / 32mm 1 1/4" / 32mm
16" / DN400 BS10 Table H 24" / 610mm 21 3/4" / 552mm 20 1" 2" / 51mm 1 3/4" / 44mm 1 3/4" / 44mm
16" / DN400 BS10 Table J 24" / 610mm 21 3/4" / 552mm 20 1 1/8" 2 1/4" / 57mm
16" / DN400 BS10 Table K 24 3/4" / 629mm 22 1/4" / 565mm 20 1 1/4" 2 5/8" / 67mm
16" / DN400 BS4504-PN6 540mm 495mm 16 M20 28mm
16" / DN400 BS4504-PN10 565mm 515mm 16 M24 32mm
16" / DN400 BS4504-PN16 580mm 525mm 16 M27 38mm 32mm
16" / DN400 BS4504-PN25 620mm 550mm 16 M33 48mm 40mm
16" / DN400 BS4504-PN40 660mm 585mm 16 M36 50mm
16" / DN400 BS4504-PN64 670mm 585mm 16 M39 60mm
16" / DN400 BS4504-PN100 715mm 620mm 16 M45 78mm

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DN450 - 18"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
18" / DN450 ANSI 125/150 25" / 635mm 22 3/4" / 578mm 16 1 1/8" 1 9/16" / 40mm 1 9/16" / 40mm
18" / DN450 ANSI 300 28" / 711mm 24 3/4" / 629mm 24 1 1/4" 2 3/8" / 60mm
18" / DN450 ANSI 600 29 1/4" / 743mm 25 3/4" / 654mm 20 1 5/8" 3 1/4" / 83mm
18" / DN450 ANSI 900 31" / 787mm 27" / 686mm 20 1 7/8" 4" / 102mm
18" / DN450 ANSI 1500 36" / 914mm 30 1/2" / 775mm 16 2 3/4" 6 3/8" / 162mm
18" / DN450 BS10 Table D 25 1/4" / 641mm 23" / 584mm 12 7/8" 1 1/4" / 32mm 1 1/8" / 29mm 1 1/8" / 29mm
18" / DN450 BS10 Table E 25 1/4" / 641mm 23" / 584mm 16 7/8" 1 3/8" / 35mm 1 1/8" / 29mm 1 1/8" / 29mm
18" / DN450 BS10 Table F 26 1/2" / 673mm 24" / 610mm 20 1 1/8" 1 1/2" / 38mm 1 3/8" / 35mm 1 3/8" / 35mm
18" / DN450 BS10 Table H 26 1/2" / 673mm 24" / 610mm 20 1 1/8" 2 1/8" / 54mm 1 7/8" / 48mm 1 7/8" / 48mm
18" / DN450 BS10 Table J 26 1/2" / 673mm 24" / 610mm 20 1 1/4" 2 3/8" / 60mm
18" / DN450 BS10 Table K 28 1/4" / 718mm 25 3/4" / 654mm 20 1 3/8" 3" / 76mm
18" / DN450 BS4504-PN6 595mm 550mm 16 M20 30mm
18" / DN450 BS4504-PN10 615mm 565mm 20 M24 32mm
18" / DN450 BS4504-PN16 640mm 585mm 20 M27 40mm

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DN500 - 20"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
20" / DN500 ANSI 125/150 27 1/2" / 699mm 25" / 635mm 20 1 1/8" 1 11/16" / 43mm 1 11/16" / 43mm
20" / DN500 ANSI 300 30 1/2" / 775mm 27" / 686mm 24 1 1/4" 2 1/2" / 64mm
20" / DN500 ANSI 600 32" / 813mm 28 1/2" / 724mm 24 1 5/8" 3 1/2" / 89mm
20" / DN500 ANSI 900 33 1/4" / 845mm 29 1/2" / 749mm 20 2" 4 1/4" / 108mm
20" / DN500 ANSI 1500 38 3/4" / 984mm 32 3/4" / 832mm 16 3" 7" / 178mm
20" / DN500 BS10 Table D 27 3/4" / 705mm 25 1/4" / 641mm 16 7/8" 1 1/4" / 32mm 1 1/4" / 32mm 1 1/4" / 32mm
20" / DN500 BS10 Table E 27 3/4" / 705mm 25 1/4" / 641mm 16 7/8" 1 1/2" / 38mm 1 1/4" / 32mm 1 1/4" / 32mm
20" / DN500 BS10 Table F 29" / 737mm 26 1/2" / 673mm 24 1 1/8" 1 5/8" / 41mm 1 1/2" / 38mm 1 1/2" / 38mm
20" / DN500 BS10 Table H 29" / 737mm 26 1/2" / 673mm 24 1 1/8" 2 1/4" / 57mm 2" / 51mm 2" / 51mm
20" / DN500 BS10 Table J 29" / 737mm 26 1/2" / 673mm 24 1 1/4" 2 1/2" / 64mm
20" / DN500 BS10 Table K 31" / 787mm 28" / 711mm 20 1 1/2" 3 1/4" / 83mm
20" / DN500 BS4504-PN6 645mm 600mm 20 M20 30mm
20" / DN500 BS4504-PN10 670mm 620mm 20 M24 34mm
20" / DN500 BS4504-PN16 715mm 650mm 20 M30 42mm 36mm
20" / DN500 BS4504-PN25 730mm 660mm 20 M33 52mm 44mm
20" / DN500 BS4504-PN40 755mm 670mm 20 M39 52mm
20" / DN500 BS4504-PN64 800mm 705mm 20 M45 68mm
20" / DN500 BS4504-PN100 870mm 760mm 20 M52 94mm

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DN600 - 24"

Valve SizeClassFlange DiameterPCDNo. of BoltsBolt SizeThickness Cast IronThickness Copper AlloyThickness Steel
24" / DN600 ANSI 125/150 32" / 813mm 29 1/2" / 749mm 20 1 1/4" 1 7/8" / 48mm 1 7/8" / 48mm
24" / DN600 ANSI 300 36" / 914mm 32" / 813mm 24 1 1/2" 2 3/4" / 70mm
24" / DN600 ANSI 600 37" / 940mm 33" / 838mm 24 1 7/8" 4" / 102mm
24" / DN600 ANSI 900 41" / 1041mm 35 1/2" / 902mm 20 2 1/2" 5 1/2" / 140mm
24" / DN600 ANSI 1500 46" / 1168mm 39" / 991mm 16 3 1/2" 8" / 203mm
24" / DN600 BS10 Table D 32 1/2" / 826mm 29 3/4" / 756mm 16 1" 1 3/8" / 35mm 1 3/8" / 35mm 1 3/8" / 35mm
24" / DN600 BS10 Table E 32 1/2" / 826mm 29 3/4" / 756mm 16 1 1/8" 1 5/8" / 41mm 1 1/2" / 38mm 1 1/2" / 38mm
24" / DN600 BS10 Table F 33 1/2" / 851mm 30 3/4" / 781mm 24 1 1/4" 1 3/4" / 44mm 1 5/8" / 41mm 1 5/8" / 41mm
24" / DN600 BS10 Table H 33 1/2" / 851mm 30 3/4" / 781mm 24 1 1/4" 2 1/2" / 64mm 2 1/4" / 57mm 2 1/4" / 57mm
24" / DN600 BS10 Table J 33 1/2" / 851mm 30 3/4" / 781mm 24 1 3/8" 2 3/4" / 70mm
24" / DN600 BS4504-PN6 755mm 705mm 20 M24 30mm
24" / DN600 BS4504-PN10 780mm 725mm 20 M27 36mm
24" / DN600 BS4504-PN16 840mm 770mm 20 M33 48mm 40mm
24" / DN600 BS4504-PN25 845mm 770mm 20 M36 46mm
24" / DN600 BS4504-PN40 890mm 795mm 20 M45 60mm
24" / DN600 BS4504-PN64 930mm 820mm 20 M52 76mm
24" / DN600 BS4504-PN100 990mm 875mm 20 M56 104mm

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Use this table as a fast-reference tool when selecting valves, gaskets, and bolting for new installations, upgrades, or maintenance work. It is particularly useful in environments where ANSI and British standards are used side-by-side, helping to prevent costly mismatches and on-site delays.

Always verify final dimensions against the relevant standard or manufacturer’s datasheet for critical applications, especially in high-pressure or safety-critical systems. This guide is intended to support day-to-day engineering decisions, streamline procurement, and provide a single source of truth for flange and gasket compatibility across your projects.