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

7 1/2" / 191mm6" / 152mm45/8"3/4" / 19mm3/4" / 19mm5/8" / 16mm3/4" / 19mm

ANSI 300

8 1/4" / 210mm6 5/8" / 168mm83/4"7/8" / 22mm 29/32" / 23mm1 1/8" / 29mm

ANSI 600

8 1/4" / 210mm6 5/8" / 168mm83/4"7/8" / 22mm  1 1/4" / 32mm

ANSI 900

9 1/2" / 241mm7 1/2" / 191mm87/8"1" / 25mm  1 1/2" / 38mm

ANSI 1500

10 1/2" / 267mm8" / 203mm81 1/8"1 1/4" / 32mm  1 7/8" / 48mm

AS2129 Table C

185mm146mm416mm18mm19mm19mm14mm

AS2129 Table D

185mm146mm416mm18mm19mm13mm14mm

AS2129 Table E

185mm146mm416mm18mm19mm13mm14mm

AS2129 Table F

205mm165mm816mm18mm19mm14mm16mm

AS2129 Table H

205mm165mm816mm18mm29mm16mm22mm

AS2129 Table J

205mm165mm819mm22mm 32mm32mm

BS10 Table D

7 1/4" / 184mm5 3/4" / 146mm45/8"11/16" / 17mm3/4" / 19mm1/2" / 13mm9/16" / 14mm

BS10 Table E

7 1/4" / 184mm5 3/4" / 146mm45/8"11/16" / 17mm3/4" / 19mm1/2" / 13mm9/16" / 14mm

BS10 Table F

8" / 203mm6 1/2" / 165mm85/8"11/16" / 17mm3/4" / 19mm9/16" / 14mm5/8" / 16mm

BS10 Table H

8" / 203mm6 1/2" / 165mm85/8"11/16" / 17mm1 1/8" / 29mm5/8" / 16mm7/8" / 22mm

BS10 Table J

8" / 203mm6 1/2" / 165mm83/4"7/8" / 22mm 1 1/4" / 32mm1 1/4" / 32mm

BS10 Table K

8" / 203mm6 1/2" / 165mm83/4"7/8" / 22mm 1 1/4" / 32mm1 1/4" / 32mm

BS4504-6

190mm150mm4M1618mm18mm  

BS4504-10

200mm160mm8M1618mm22mm  

BS4504-16

200mm160mm8M1618mm22mm13mm20mm

BS4504-25

200mm160mm8M1618mm26mm14mm24mm

BS4504-40

200mm160mm8M1618mm 16mm24mm

BS4504-64

215mm170mm8M2022mm  28mm

BS4504-100

230mm180mm8M2426mm  36mm

 

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.