Brain Teaser

[Mark P.Participant @markp]

The noisy end of a jet engine is a jet pipe!
Mark P.

[Martin ConnellyParticipant @martinconnelly55370]

Sam L, pipe is available seamed or seamless, tube is available seamed or seamless. The method of manufacture cannot be used as a means of differentiating between what gets called pipe and what gets called tube.

Martin

[Neil WyattModerator @neilwyatt]

Posted by Michael Gilligan on 04/03/2016 17:57:53:

Posted by Michael Gilligan on 04/03/2016 15:34:18:

GIYF

.

Neil,

I thought you were just recycling the very recent explanation that I linked ^^^

MichaelG.

I don't think that page is as clear as the person who put it together thinks it is.

It would be better if he made it explicit that pipe is named for its (nominal) ID although it is manufactured to an exact OD.

 

Hi point that tube is generally structural and pipe generally transports things is useful too.

After all Status Quo could hardly have gone down the dust-tube.

Neil

Edited By Neil Wyatt on 04/03/2016 18:33:20

[Richard MarksParticipant @richardmarks80868]

[Richard MarksParticipant @richardmarks80868]

Sorry about the last post, Can you do anything with it Neil?

[Martin ConnellyParticipant @martinconnelly55370]

Gas fuel, liquid fuel, lubricating oil, air carbon dioxide are all transported by tube used in gas turbine packages. Rather ruins the idea that tubes are structural. Then there is scaffolding as used in the UK that is 1.5 sch40 nominal bore pipe. Purely structural and not used to transport any fluids except by accident if it rains.

Tube bought based on its imperial sized outside diameter and wall thickness is specified to plus or minus 0.005", I don't know the tolerance for metric OD tube. Nominal pipe sizes are based on ANSI standards and the tolerance on OD for sizes about 2" NPS is over plus or minus 0.06" if I remember correctly. Also nominal bore pipe has a minimum wall thickness but no maximum wall thickness, instead it has a maximum weight per unit length. This is a completely different way of defining the material from that used for OD tube.

Nominal bore fittings such as tees, elbows, reducers have dimensional tolerances of 0.06" and tube fittings match the tolerances of tube of 0.005".

It is because of these two major differences in the tolerances and method of specifying size that we differentiate between tube and pipe raw materials where I work.

Martin

[Neil WyattModerator @neilwyatt]

Posted by Richard Marks on 04/03/2016 18:56:53:

Sorry about the last post, Can you do anything with it Neil?

I don't think so

Only download, rotate and upload anew version, but you can probably do that..

I've got a cricked neck now!

Neil

[Richard MarksParticipant @richardmarks80868]

This should be better!

[JAParticipant @ja]

On second thoughts I have yet to see a cathode ray pipe. I must admit I have not seen a cathode ray tube for some time.

JA

[Nicholas FarrParticipant @nicholasfarr14254]

Hi, and there's me thinking that a pipe went round the house and into the radiators to keep you warm, and a tube gave out light, so you could see OK during the dark winters night.

Regards Nick.

[dave george 1Participant @davegeorge1]

Just to throw a spanner in the works.. what about scaffold pole.. is that pipe or tube.. ive never heard of a scaffold tube or scaffold pipe

[Cornish JackParticipant @cornishjack]

Tube – "The lower part of a gamopetalous corolla or a gamosepalous calyx, below the lobes."

Pipe – None of the above … but I expect you all knew that anyway!

rgds
Bill

[Michael GilliganParticipant @michaelgilligan61133]

Posted by dave george 1 on 04/03/2016 19:46:16:
… ive never heard of a scaffold tube or scaffold pipe

.

Oops !!

[Ian PParticipant @ianp]

Watchmakers call the shaft that carries the hour hand a 'Pipe'.

Ian P

[DodParticipant @dod]

A tube becomes a pipe just as surely as when a short plank becomes a long board

Unless its a YouTube then .. . . . . . .

[Russell EberhardtParticipant @russelleberhardt48058]

Pipe has another common meaning in French

Russell.

[SillyOldDufferModerator @sillyoldduffer]

Posted by Michael Gilligan on 04/03/2016 15:34:18:

GIYF

I not sure anyone who calls Atomic Number 13 "Aluminum" can be trusted on this important question. In the US a tube is a valve and they don't know what an earth is. Vive la différence!

Cheers,

Dave

[Michael GilliganParticipant @michaelgilligan61133]

Dave

I'm beginning to wish I hadn't found that page.!!

I only linked it because I thought I had found Neil's source of inspiration.

MichaelG.

[nigel jones 5Participant @nigeljones5]

you dont smoke a tube!

[NJHParticipant @njh]

Pipe(s) – an ancient and effective method of torture employed principally in the north of Britian.

Tube – a means of transport and torture used principally in the south of England.

( OK I'll go to bed now! )

 

Norman

Edited By NJH on 04/03/2016 20:59:58

[Sam Longley 1Participant @samlongley1]

Posted by dave george 1 on 04/03/2016 19:46:16:
Just to throw a spanner in the works.. what about scaffold pole.. is that pipe or tube.. ive never heard of a scaffold tube or scaffold pipe

Being a builder I have always referred to scaffolding as tube, as do most scaffolders. Scaffolders rarely call them poles. To support my earlier claim i used to have a lot of scaffold tube that had a butt joint instead of a seam. Have not seen any for years though

[Michael GilliganParticipant @michaelgilligan61133]

Magritte understood the problem.

MichaelG.

[SillyOldDufferModerator @sillyoldduffer]

Posted by Michael Gilligan on 04/03/2016 21:09:40:

Magritte understood the problem.

MichaelG.

Now we know what Neil's fiendish plan is. He's created a three-way paradox out of the conventional notion that objects correspond to words and images. I think it's part of a plot to explain away any dimensional errors in MEW drawings as being experiments in surrealism.

I may be a little over-medicated at the moment.

[Neil WyattModerator @neilwyatt]

Ceci n'est pas un tube?

> In the US a tube is a valve

I thought it was the other way round?

Neil

[Simon Williams 3Participant @simonwilliams3]

Experience tells me that if I make a tubular structure.out of pipe it will be heavier than if I used tube.

If I pass sparks along it, it will be conduit. If it is used to carry water, then it's definitely pipe. Unless it's flexible, when it reverts to being tube again. If it carries oil or gas, then it's almost certainly made of tube, unless I've over-engineered it and made it out of pipe when it becomes a manifold. Or maybe it's a chimney, in which case it's made out of flue pipe.

Ambiguity? What ambiguity, we all understand each other.

[Author]

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