MAXAFLEX Flange Dimensions Guide
MAXAFLEX Flange Dimensions Guide
Find outside diameter, pitch circle diameter (PCD), bolt hole count, hole size, bolt size and minimum flange thickness for the flange standards most commonly used across Australian pumping, water, industrial and HVAC systems.
Download the free PDF guide from Southern Pumping, the Australian distributor of MAXAFLEX valves, flanges and fittings.
Free download. No sign-up required.
Find your flange
Search by the measurements of the flange you have, or look up a standard, table or class to see its full dimensions. All sizes are in millimetres.
| Nominal size | Standard | Table / Class | OD | PCD | No. holes | Hole Ø | Bolt | Minimum flange thickness | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cast iron | Ductile iron | Copper alloy | Steel | ||||||||
Matching products in our range
Products drilled to suit the flanges above.
Matched by flange drilling. Check material and pressure rating on the product page before ordering.
Flange standards in the guide
Quickly compare flange drilling and dimensions across the standards you'll come across on Australian sites, so you can match pumps, valves and pipework the first time.
AS 2129
Australian standard flanges, including Table A, Table D, Table E, Table F and Table H.
AS 4087
Flanges for waterworks, including PN14, PN16, PN21 and PN35 classes.
ISO 7005 (DIN)
Metric PN-rated flanges from PN6 to PN40, compatible with AS/NZS 4331 and BS 4504.
ANSI B16.5
American Class 150, 300 and 600 flanges for imported equipment and process systems.
Flange measurements explained
- Nominal size (DN)
- The nominal bore of the pipe the flange suits, for example 50mm or 100mm.
- Outside diameter (OD)
- The overall diameter across the outer edge of the flange.
- Pitch circle diameter (PCD)
- The diameter of the circle running through the centre of each bolt hole. Two flanges must share the same PCD and hole count to bolt together.
- Hole diameter and bolt size
- The size of each bolt hole and the bolt (for example M16) used to fasten the joint.
- Minimum flange thickness
- The minimum thickness for each material, such as cast iron, ductile iron, copper alloy and steel.
- Table / Class / PN
- The pressure rating designation for each standard. Higher ratings usually mean more or larger bolts and thicker flanges.
Shop flanged products
Once you've confirmed your flange standard and size, browse our range of MAXAFLEX and flanged products.
Flange dimensions FAQ
How do I identify which flange standard I have?
Measure the outside diameter, the pitch circle diameter and count the bolt holes, then enter them in the calculator above or compare them against the tables in the guide. Many flanges are also stamped with their standard and rating, such as "Table E" or "PN16".
Are AS 2129 and AS 4087 flanges compatible?
Some are. AS 4087 PN14 and PN16 drilling is generally compatible with AS 2129 Table D, while PN21 and PN35 align with Table F and Table H. Always confirm the drilling for your specific size in the guide.
Can DIN and ANSI flanges be bolted to Australian flanges?
Usually not without an adaptor, as the PCD and bolt hole layout differ. The guide lets you compare dimensions side by side to check.
Is the guide free to download?
Yes. The MAXAFLEX Flange Dimensions Guide is a free PDF with no sign-up required.
Need help selecting a flange or valve?
Our industrial sales team can help with product identification and support. Call 1800 810 670 or contact us.
Get the MAXAFLEX Flange Dimensions Guide
Keep it on your phone or print it for the workshop.
Technical tool disclaimer: This guide is provided as a general reference only. Dimensions may vary between manufacturers and standard revisions, so always confirm against the relevant standard or product specification before ordering or installation. Southern Pumping accepts no liability for errors or omissions.
