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Re: Pipes and Tubes
Re: Pipes and Tubes -- shansundar	Post Reply	Top of thread	Forum

Posted by: flogamag ® 09/08/2005, 12:32:39 Author Profile Mail author Edit

Hi..., according to the way both words are used by ASTM Standards, a tube is a structural element, that is, a beam with a circular (or not) and hollow section. A pipe is an element for transporting fluids. In some cases (depending on the use conditions), the same piece could act, at the same time, as tube and pipe. As a consequence of this classification, the most important size on tubes is the external diameter, and, on tubes, the internal one. Many people (at least in my country) use the word "tube" for seamless pieces, and "pipe" for welded ones. This is completely wrong... Just as an aditional example, a rubber hose is a pipe, it could never be a tube. Also, the internal finishing of a tube doesn´t seem to be important... Hope to have added my contribution to the general confussion. Greetings.

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Re: Pipes and Tubes
Re: Pipes and Tubes -- shansundar	Post Reply	Top of thread	Forum

Posted by: spgautam ® 06/26/2005, 13:54:57 Author Profile Mail author Edit

friends if you will go to market and ask the vendor for 1" pipe and 1" tube what you expect ? . a convention is that for pipes internal diameter is reference where as for tubes external diamter . ex. tubelight 's external dia is of importance so its tubelight and not pipelight. hopefully clarified

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Re: Pipes and Tubes
Re: Re: Pipes and Tubes -- spgautam	Post Reply	Top of thread	Forum

Posted by: randykimball ® 06/26/2005, 22:16:57 Author Profile Mail author Edit

Then copper tubing does not come in inside and outside versions... ah, but it does. Is tubing extruded and pipe formed...? food for thought... -randy The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them.

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Re: Pipes and Tubes
Re: Pipes and Tubes -- shansundar	Post Reply	Top of thread	Forum

Posted by: randykimball ® 03/27/2005, 17:21:02 Author Profile Mail author Edit

Well, I usually consider extruded product as tubing, and rolled, cast, or other methods as pipe. Actually, I think it is another of those English times, when it really doesn't matter all that much. Anyone else have an opinion? -randy- The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them.

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Re: Pipes and Tubes
Re: Re: Pipes and Tubes -- randykimball	Post Reply	Top of thread	Forum

Posted by: shansundar ® 03/28/2005, 00:53:40 Author Profile Mail author Edit

thanks for your comments Randay shan

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Re: Pipes and Tubes
Re: Re: Pipes and Tubes -- randykimball	Post Reply	Top of thread	Forum

Posted by: devitg ® 03/27/2005, 19:43:06 Author Profile Mail author Edit

Seem to be a semantic topic. It can be , seam or seamless , extrude, or cold formed. steel, plastic , non ferrous , and even glass. To me , PIPES are those whose nominal diameter is not it's real diameter as those to be therad on the NPT or BSP system as follow PIPE O.D SIZES DIAM 1/8 0.405 1/4 0.540 3/8 0.675 1/2 0.840 3/4 1.050 1 1.315 1 1/4 1.660 1 1/2 1.900 2 2.375 2 1/2 2.875 3 3.500 3 1/2 4.000 4 4.500 4 1/2 5.000 5 5.563 6 6.625 7 7.625 8 8.625 9 9.625 10 10.750 11 11.750 12 12.750 And TUBES are those whose diameter is the real diameter , both in Metric and English systems.

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Re: Pipes and Tubes
Re: Re: Pipes and Tubes -- devitg	Post Reply	Top of thread	Forum

Posted by: shansundar ® 03/28/2005, 00:54:35 Author Profile Mail author Edit

thanks for your comments divi shan

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