Anyone got a table of metric pipe sizes for copper, steel, MDPE and ductile iron and how each size relates to each different material?

I have googled it with no luck.

what?

what are you trying to do?

In steel, depends on industry, but NPS seems to still rule….

http://en.wikipedia.org/wiki/Nominal_Pipe_Size

….. the DN (metric) equivalence table is here….

http://www.engineeringtoolbox.com/nps-nominal-pipe-sizes-d_45.html

… and the copper (imperial) table is here ( – IIRC, metric copper sizes are just ‘metric-ised’ imperial, i.e. 22mm, rather than 22.225, but I am standing to be corrected on this! 🙂

http://en.wikipedia.org/wiki/Copper_tubing#Sizes

Not sure if that actually answers the question you were asking 😉

For MDPE, the listed size is the internal bore, for most metallic tubes the dimension listed is the outside diameter. And most PE is metric, most metallic imperial.

The O/D of MDPE will depend on the schedule, PE80, PE100 etc and its SDR.

What do you need it for, loss calculations?

Oh and for PE, common utility sizes are 20mm, 32, 50 (less so) 63, 75 (rarely) 90, 125 180 250 315 355 and then its really up to how big you want to go up to around 1600mm.

for most metallic tubes the dimension listed is the NOMINAL outside diameter

…The actual OD very rarely (edit: if at all, in fact?) corresponds with the nominal OD quoted for the tube.

For domestic I’d fit the 1600mm to be on the safe side. Reducers for the rads could be problematic though.

For MDPE, the listed size is the internal bore, for most metallic tubes the dimension listed is the outside diameter. And most PE is metric, most metallic imperial.

The O/D of MDPE will depend on the schedule, PE80, PE100 etc and its SDR.

What do you need it for, loss calculations?

You’ve got these the wrong way round I’m afraid, MDPE and HPPE are quoted as OD, metallic pipes (and clay/concrete etc) are quoted on ID. The ID of MDPE will depend on the SDR.