rb wrote:
I'm seeing pipe which measure 1.25" outer diameter. Is this the same as
what I call 1" pipe?


Hi,
Is one equal to one and quarter? No.

On Sun, 6 Dec 2009 10:28:59 -0800, "rb" wrote:

I'm seeing pipe which measure 1.25" outer diameter. Is this the same as
what I call 1" pipe?

Yes http://www.pipemarkers.com/pipe-data.html

I'm seeing pipe which measure 1.25" outer diameter. Is this the same as
what I call 1" pipe?

Pipe as commonly known as pipe it would be measure ID steel, brass,copper,
aluminum, ETC.
Tubing known as tubing it is always measure OD regardless of material is
made of.
Copper tubing comes in three thickness but the OD remain same.
Electrical Pipe it is also measure in ID. Note; but EMT is measure in OD.


wrote in message
...
On Sun, 6 Dec 2009 10:28:59 -0800, "rb" wrote:

I'm seeing pipe which measure 1.25" outer diameter. Is this the same as
what I call 1" pipe?

Yes http://www.pipemarkers.com/pipe-data.html

"Grunpy" wrote in message
...
Pipe as commonly known as pipe it would be measure ID steel, brass,copper,
aluminum, ETC.
Tubing known as tubing it is always measure OD regardless of material is
made of.
Copper tubing comes in three thickness but the OD remain same.
Electrical Pipe it is also measure in ID. Note; but EMT is measure in ID
but the OD changes

wrote in message
...
On Sun, 6 Dec 2009 10:28:59 -0800, "rb" wrote:

I'm seeing pipe which measure 1.25" outer diameter. Is this the same as
what I call 1" pipe?

Yes http://www.pipemarkers.com/pipe-data.html

On Sun, 06 Dec 2009 11:39:24 -0500, BQ340
wrote:

rb wrote:
I'm seeing pipe which measure 1.25" outer diameter. Is this the same as
what I call 1" pipe?

I don't know the answer to this question, but.


Pipe is measured by the nominal ID, not OD.

He didnt' say others had measure it by the OD, only that he had. Or
thats was specified by the OD, or even that the OD was listed anywher.
Only iiuc that when he measured the OD, it was 1.25".

According to Tnom's chart, pipe that is nominally 1" is 1.315 is
diameter. That's close. Maybe rb measured wrong? Maybe he was
talking about tubing but called it pipe? Maybe it's red Chinese pipe,
and doesn't meet standards?

Different material pipe has
different wall thicknesses. Only tubing is measured by OD.

MikeB

On Sun, 06 Dec 2009 10:32:47 -0700, Tony Hwang
wrote:

rb wrote:
I'm seeing pipe which measure 1.25" outer diameter. Is this the same as
what I call 1" pipe?


Hi,
Is one equal to one and quarter? No.

Pipe with 1" I.D. might very well measure 1.25" O.D.

Pipe sizes are usually given based on I.D.

In fact, due to the high price of copper, you'll find that current 1/2
inch copper tubing is slightly more than 1/2" ID, because they are
making the walls thinner to save material, but still need it to be
compatible with standard fittings and older plumbing.

Another example is 1" PVC pipe, which is 1" I.D. and 1-5/8" O.D.

On Dec 6, 12:25*pm, wrote:
On Sun, 06 Dec 2009 10:32:47 -0700, Tony Hwang
wrote:

rb wrote:
I'm seeing pipe which measure 1.25" outer diameter. * Is this the same as
what I call 1" pipe?

Hi,
Is one equal to one and quarter? No.

Pipe with 1" I.D. might very well measure 1.25" O.D.

Pipe sizes are usually given based on I.D.

In fact, due to the high price of copper, you'll find that current 1/2
inch copper tubing is slightly more than 1/2" ID, because they are
making the walls thinner to save material, but still need it to be
compatible with standard fittings and older plumbing.

Another example is 1" PVC pipe, which is 1" I.D. and 1-5/8" O.D.

OP-

wow...you sure have gotten a range of replies but to address your
original question

"I'm seeing pipe which measure 1.25" outer diameter. Is this the
same as
what I call 1" pipe"


well....it depends. what job is this "pipe" doing? what is the
apparent material? and how did you measure the OD? (tape?
circumferential wrap? caliper?)

If it is truly "pipe" ...... there is no standard Imperial sized pipe
having an OD of 1.25". Maybe your measurement is lacking in
accuracy?

One inch pipe has an OD of 1.315" (pretty close to 1 5/16").


Pretty much all pipe (brass, aluminum, steel, stainless, PVC) have
precise agreed upon OD specs such that threaded fittings can be used
on OD of pipe, independent of pipe schedule.

3/4" pipe 1.049" OD
1" pipe 1.315" OD
1 1/4" pipe 1.660" OD

cheers
Bob

"BQ340" wrote in message

Only tubing is measured by OD.

Have you measured 1/2" copper tubing recently?

Ah, that would be water copper that Ed mentions?
Refrigeration and AC tubing is actual OD.

1/2" nominal water copper is actual 5/8.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Ed Pawlowski" wrote in message
...

"BQ340" wrote in message

Only tubing is measured by OD.

Have you measured 1/2" copper tubing recently?