[1" pipe] means radius 1" or diameter?

Answer 1

I believe it means INTERIOR diameter.

Answer 2

Pipe is described in nominal pipe diameter, thus a 1" pipe is nominally 1" in diameter. This is neither the OD, nor the ID of the pipe. As frustrating as that sounds, nominal pipe size is like saying "roughly" or "pretty close to" the actual diameter of the pipe.

Pipe actual OD and ID is a function of the nominal pipe size and the "schedule", which defines wall thickness.

See attached link as a guide to actual pipe sizes based on the nominal pipe size.

If you are doing basic fluids calcs, take your 1" pipe to mean ID, and state your assumption. If you are sizing a system for actual implementation or a real world application, use the actual ID based on the attached link.

If you are doing this at a physical facility, measure the OD and use a UT thickness tester to test the thickness and get the actual OD/ID.

Answer 3

Inside diameter

Answer 4

If you are doing a fluid dynamics problem odds are it is the interior diameter. If however you are in a plant setting, you would need to look up material of construction and schedule of the pipe and find it's actual inner diameter. As it varies from material to material.

Answer 5

Diameter.

Answer 6

1" radius would be a 2" pipe....Plumbing, gas etc., is measured inside diameter. Air conditioning, refridiration tubing or copper pipe, is measured outside dia...........A 1" pipe measures 1" inside and about 1 1/4" outside..

Answer 7

Interior diameter.

Answer 8

It implies diameter, but it is neither the I.D. or the O.D. in most cases, but a 'nominal' measurement. Usually, the 'nominal' measurement lies in between the I.D and O.D.

Answer 9

radius= the measurement across the outside of the pipe ,, diametor = how wide the inside of the pipe is

Answer 10

I.d.