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

16" / 406mm14 1/4" / 362mm127/8"1" / 25mm1 3/16" / 30mm1" / 25mm1 3/16" / 30mm

ANSI 300

17 1/2" / 445mm15 1/4" / 387mm161"1 1/8" / 29mm  1 7/8" / 48mm

ANSI 600

20" / 508mm17" / 432mm161 1/4"1 3/8" / 35mm  2 1/2" / 64mm

ANSI 900

21 1/2" / 546mm18 1/2" / 470mm161 3/8"1 1/2" / 38mm  2 3/4" / 70mm

ANSI 1500

23" / 584mm19" / 483mm121 7/8"2" / 51mm  4 1/4" / 108mm

AS2129 Table C

405mm356mm819mm22mm25mm25mm19mm

AS2129 Table D

405mm356mm819mm22mm25mm19mm19mm

AS2129 Table E

405mm356mm1219mm22mm25mm22mm22mm

AS2129 Table F

430mm381mm1222mm26mm29mm25mm25mm

AS2129 Table H

430mm381mm1222mm26mm41mm35mm35mm

AS2129 Table J

430mm381mm1225mm30mm  48mm

BS10 Table D

16" / 406mm14" / 356mm83/4"7/8" / 22mm1" / 25mm3/4" / 19mm3/4" / 19mm

BS10 Table E

16" / 406mm14" / 356mm123/4"7/8" / 22mm1" / 25mm7/8" / 22mm7/8" / 22mm

BS10 Table F

17" / 432mm15" / 381mm127/8"1" / 25mm1 1/8" / 29mm1" / 25mm1" / 25mm

BS10 Table H

17" / 432mm15" / 381mm127/8"1" / 25mm1 5/8" / 41mm1 3/8" / 35mm1 3/8" / 35mm

BS10 Table J

17" / 432mm15" / 381mm121"1 1/8" / 29mm  1 7/8" / 48mm

BS10 Table K

17" / 432mm15" / 381mm161"1 1/8" / 29mm  2" / 51mm

BS4504-6

375mm335mm12M1618mm24mm  

BS4504-10

395mm350mm12M2022mm28mm  

BS4504-16

405mm355mm12M2426mm32mm 26mm

BS4504-25

425mm370mm12M2730mm36mm 32mm

BS4504-40

450mm385mm12M3033mm  38mm

BS4504-64

470mm400mm12M3336mm  46mm

BS4504-100

505mm430mm12M3639mm  60mm

 

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.