How to identify iron pipe sizes?

May 31, 2017 10 Replies

I need to remove some redundant pipework and temporarily plug the bits I can't deal with at the moment, but I don't know what size they are. The approx external pipe diameters are 1.7" (43mm) and 1.3" (34mm) - how can I identify them?


Sound like 1 1/4" and 1" respectively

Thanks! I don't know why Google didn't find it, but that's one to bookmark

Iron pipe size is determined by the inside diameter.

Mike

Certainly is.

Did you notice who claims the Copyright?

I don't think Biggles is involved ...

Shows a nice sense of humour, though.

More accurately, the Nominal Bore. The actual inside diameter varies according to the Schedule (wall thickness) while keeping the outside the same for that NB.

SteveW

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