round pipe

[dell]

Hi group,

I have a pipe of length 6' .Its ID is 11.25" and OD is 12.75".I need to
find whether the pipe has same diameter everywhere.Please give solution
using simple tools.Circumfrence measurement using a soft tape is not a
good solution as chances of error are too much.

Inside diameter is more important need to be varified.

Thanks.

[dhruv...@gmail.com]

Hi,
according to theory the volume of the pipe is pi * (r^2) * L.
Now fill the pipe with some fluid which won't stick to the inner
surface of the pipe. measure the volume of the fluid and compare it
with the theoritical value.
if the values are equal then the diameter is same throughout the pipe
or else different.

dhruvit

[russellsantos]

maybe we can modify dhruv's solution a little bit. First, we do as
dhruv said, measure the volume of the whole pipe and compare it with
the theoretical value. If it is wrong, we know that it is not even all
the way. If it is correct, we can now fill up the pipe to half its
length and then compare that value to half of the theoretical volume of
the pipe. Again we apply the test: if it is wrong, we know it is not
even all the way. If it is correct, then we test 1/4 of the length of
the pipe. We can do so until halving the measured length negligible.
This process can also be modfied a little to find out where the
inconsistencies occur along the length of the pipe.