Pipework measurements

[Leoki]

Hello, can someone help to confirm the following please. I have taken the measurement of steel pipework on a galvanised f & e cistern. The OD of the supply pipe and the feed and expansion pipe is as near as damn it 27mm which i believe will make it 1inch pipework ?. I have used a metric converter and it officially comes out at about 1.06 inch.

Does anyone out there have a useful metric/imperial conversion table/guide that i can use for future reference please.

 

[Resolute]

How far does the steel pipework run? If it's not far then it would be worth renewing it at the same time!

 

[Leoki]

Unfortunately the house which was builut circa 1920 has extensive runs of steel pipework throughout it.

 

[SimonJohns]

www.tapshop.net/bsp_etc/index.html

I would say its 3/4"

 

[midge]

Leo, Pipe (iron) is measured on inside diameter, tube (copper) on outside diameter.
Yours is 3/4"

 

[tamz]

39 years doing this stuff and i couldn't tell you the od of a steel pipe without looking it up but can tell at 20 paces what it is.

Anyway; curiosity got the better of me since we are talking thous here so i went out to the van with a micrometer :sad: and grabbed a bit pipe
od of 3/4" iron is 26.94mm = 1.0605"