Previous in Forum: Titanium Material - Fabrication and Welding   Next in Forum: Reusable Gaskets for High-Purity Gas Connections
Close
Close
Close
5 comments
Rate Comments: Nested
Active Contributor

Join Date: Jan 2009
Posts: 22

mechanical engineering

02/17/2009 10:03 AM

difference between tube and pipe.

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Guru
Engineering Fields - Piping Design Engineering - Retired Piper

Join Date: Feb 2007
Location: Bayonet Point, Florida
Posts: 635
Good Answers: 61
#1

Re: mechanical engineering

02/17/2009 12:27 PM

Pipe, A definition of

The question: "What is the definition of pipe?"

My answer:

Pipe: n, A hollow cylinder or tube used to conduct a liquid, gas, or finely divided solid. B. A section or piece of such a tube.

The above is the dictionary definition for pipe. It uses the word (tube) to describe pipe. This use of the word tube can and does cause confusion among people new to the piping profession. Although pipe and tubing may look somewhat alike they are different. In the process plant engineering, design, material supply and construction business we actually have two different items. As a piper you must know and be able to recognize the difference.

Pipe and tubing are both product that are used everywhere in the process plant construction industry. Pipe is made of all sorts of materials - galvanized steel, black steel, stainless steel, chrome-alloy steels, aluminum, copper, cast iron, concrete, glass and plastics such as ABS, PVC, CPVC, polyethylene, and polybutylene. Pipe is also made as concrete lined steel, plastic lined and glass lined.

Tubing is also made in many of these same materials.

Tubing

The question:

"What is the definition of Tubing?"

My answer:

Tubing (in the USA) is sized by the O. D. Tubing in the UK and other parts of the world have a different O. D. than the size name. Tubing of all sizes and wall thicknesses can be fabricated or assembled using fittings or bends.

The "Specifications" section of the www.pipingdesigners.com website has many charts and tables to show you what you need to know about tubing sizes.

USA

Tubing is normally "cold drawn" seamless with the O.D. the same as the size designation (i.e.: 1" inch tubing has an O. D. of 1 inch). You can get different pressure ratings of 1" tubing by changing the wall thickness. Thus the I. D. is smaller. Tubing normally comes in twenty foot lengths or in coils. Tubing is normally joined with compression type tubing fittings.

__________________
Do it once and do it right
Register to Reply
Guru

Join Date: Jul 2006
Location: "Dancing over the abyss."
Posts: 4884
Good Answers: 243
#2

Re: mechanical engineering

02/17/2009 1:07 PM

Do a search in the box to the right. this has been covered many times before.

milo

__________________
People say between two opposed opinions the truth lies in the middle. Not at all! Between them lies the problem, what is unseeable,eternally active life, contemplated in repose. Goethe
Register to Reply
Guru

Join Date: Mar 2007
Posts: 2550
Good Answers: 103
#3

Re: mechanical engineering

02/17/2009 10:37 PM

Getting sick of this question

and

Why Voltages are in multiple of 11

etc.

People here do't have the basic intelligence to search the threads and like kids come running to the forum asking the questions.

And a few of our fellow CR4s (can be seen by checking the previous posts) ask questions that are too basic to be asked.

People should understand that forums are not the areas where you clarify your doubts arising in the classrooms. For that you arr supposed to ask your professor then and there or are you too shy/conceited to ask questions ?

__________________
Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
Register to Reply
Power-User

Join Date: Nov 2006
Location: San Francisco Bay area
Posts: 212
Good Answers: 15
#4
In reply to #3

Re: mechanical engineering

02/18/2009 4:03 AM

Hello sb,

Your reply is harsh and a little rude. If a person cares enough to post a question on a forum he expects a reply from someone who cares. No one forces a reply from a member on the forum. You should only reply, if a topic is of interest to you. If no one shows an interest in a particular question or topic, the questioner will learn this and soon mature to ask 'brighter ' questions, worthy of your time.

Hope this is not tooooo harsh!

__________________
I like 2 tinker-no, really!
Register to Reply
Associate

Join Date: Jan 2009
Location: Saudi Arabia
Posts: 39
#5

Re: mechanical engineering

02/19/2009 3:44 AM

Mr. PennPiper

u are correct

Mr.sb

you get sick or boring it is ur problem not the questioner, we r here in CR$ to learn somthing not to replay to the questioner that we are boring or sick from their qeustions.

regards.

Register to Reply
Register to Reply 5 comments
Copy to Clipboard

Users who posted comments:

2tinker (1); Milo (1); Naif (1); PennPiper (1); sb (1)

Previous in Forum: Titanium Material - Fabrication and Welding   Next in Forum: Reusable Gaskets for High-Purity Gas Connections

Advertisement