Phone 06 348 8172

Fax 06 348 8173

Email delvin@delvin.co.nz

238 Taupo Quay

P.O.Box 142

Wanganui, New Zealand

Size

Table

Flange

 Diameter

PCD

Bolts

Bolt

Size

Hole Size

Thickness

Grey Cast Iron

Copper Alloy

 Cast / Forged Steel

ANSI 125/150

25" / 635mm22 3/4" / 578mm161 1/8"1 1/4" / 32mm1 9/16" / 40mm 1 9/16" / 40mm

ANSI 300

28" / 711mm24 3/4" / 629mm241 1/4"1 3/8" / 35mm  2 3/8" / 60mm

ANSI 600

29 1/4" / 743mm25 3/4" / 654mm201 5/8"1 3/4" / 44mm  3 1/4" / 83mm

ANSI 900

31" / 787mm27" / 686mm201 7/8"2" / 51mm  4" / 102mm

ANSI 1500

36" / 914mm30 1/2" / 775mm162 3/4"2 7/8" / 73mm  6 3/8" / 162mm

AS2129 Table C

640mm584mm1222mm26mm35mm35mm29mm

AS2129 Table D

640mm584mm1222mm26mm32mm29mm29mm

AS2129 Table E

640mm584mm1622mm26mm35mm29mm29mm

AS2129 Table F

675mm610mm2029mm33mm38mm35mm35mm

AS2129 Table H

675mm610mm2029mm33mm54mm48mm48mm

AS2129 Table J

675mm610mm2032mm35mm  60mm

BS10 Table D

25 1/4" / 641mm23" / 584mm127/8"1" / 25mm1 1/4" / 32mm1 1/8" / 29mm1 1/8" / 29mm

BS10 Table E

25 1/4" / 641mm23" / 584mm167/8"1" / 25mm1 3/8" / 35mm1 1/8" / 29mm1 1/8" / 29mm

BS10 Table F

26 1/2" / 673mm24" / 610mm201 1/8"1 1/4" / 32mm1 1/2" / 38mm1 3/8" / 35mm1 3/8" / 35mm

BS10 Table H

26 1/2" / 673mm24" / 610mm201 1/8"1 1/4" / 32mm2 1/8" / 54mm1 7/8" / 48mm1 7/8" / 48mm

BS10 Table J

26 1/2" / 673mm24" / 610mm201 1/4"1 3/8" / 35mm  2 3/8" / 60mm

BS10 Table K

28 1/4" / 718mm25 3/4" / 654mm201 3/8"1 1/2" / 38mm  3" / 76mm

BS4504-6

595mm550mm16M2022mm30mm  

BS4504-10

615mm565mm20M2426mm32mm  

BS4504-16

640mm585mm20M2730mm40mm  

 

Notes:

What is DN?

DN stands for 'Diameter Nominale'.

Put simply, it is a rough translation of mm from imperial sizes, assuming that an inch is 25mm.

We refer to a 12" flange as DN300, when in fact it is 304mm.

"DN15 6"DN150
"DN20 8"DN200
1"DN25 10"DN250
1"DN32 12"DN300
1" DN40 14"DN350
2"DN50 15"DN375
2"DN65 16"DN400
3"DN80 18"DN450
4"DN100 20"DN500
5"DN125 24"DN600

What is the PCD?

The PCD of a flange is one of the critical dimensions.

PCD (Pitch Circle Diameter) is the diameter of a circle that goes through each of the bolt holes.

 

There are several standards for flanges, and we deal with four of them;

British Standard - BS10

Table D

Table E

Table F

Table G

Table H

Table J

Table K

 

Table E is the most popular for applications with water.

All dimensions are specified in inches.

Australian Standard - AS2129

Table C

Table D

Table E

Table F

Table G

Table H

Table J

 

These flanges are equivalent to the BS10 flanges, except that all dimensions are specified in mm.

In some sizes, bolt holes are slightly larger to give better clearance.

American National Standards Institute (ANSI)

ANSI 125

ANSI 150

ANSI 300

ANSI 600

ANSI 900

ANSI 1500

 

Higher numbers denote higher pressures.

Sometimes people use the word 'Class' instead of ANSI. e.g. an ANSI 150 flange might be called a 'Class 150'

All dimensions are specified in inches.

British Standard - BS4504

BS4504-6

BS4504-10

BS4504-16

BS4504-25

BS4504-40

BS4504-64

BS4504-100

PN6

PN10

PN16

PN25

PN40

PN64

PN100

Engineers use the prefix PN (Pressure Nominale). e.g. a BA4504-16 flange will commonly be referred to as a PN16

Generally, a PN16 flange is designed to withstand pressures up to 16 bar.

All dimensions are specified in mm.