Topic: tube bending

[KDXSR5]

Tube is measured to tighter tolerances than pipe. For example, a given wall thickness in tube will be much more uniform than a given wall thickness in pipe. My dad sells pipe for a living, and he told me that a lot of times you will find pipe that has really thin spots that can greatly lower the strength of the pipe. Tube is held to higher standards than pipe. Other than that, I don't know much about the differences, although I am sure there are plenty.

[KDXSR5]

I just talked to my dad, and he said this (to put it in simple terms): pipe is made to carry liquids, tube is made to be used for structural stuff. Plus tube looks a lot nicer than pipe. Anyone else know differences?

[DeadlyPeace]

This is the definition for pipe from the Wikipedia encyclopedia (tubing was pretty much the same definition).

Pipe is a tube or hollow cylinder for the conveyance of fluid, gas and sometimes other materials. The terms 'pipe' and 'tubing' are almost interchangeable. 'Pipe' is generally specified by the internal diameter (ID) whereas 'tube' is usually defined by the outside diameter (OD) but may be specified by any combination of dimensions (OD, ID, wall thickness), depending upon which are considered the most important to the designer. 'Tube' is often made to custom sizes and may often have more specific sizes and tolerances than pipe. Also the term "tubing" can be applied to tubes of a non-cylindrical nature (i.e. square tubing). The term 'tubing' is more widely used in the USA and 'pipe' elsewhere in the world.

[Duffil]

what is the difference between pipe and tube?

go search that on pirate

[DeadlyPeace]

Yeah that would go over real well I'm sure.

[Doof [OP]]

ive heard stories about that place, and i want to keep my nuts thank you very much... lol

[CTENG in KS]

Pirate is a wealth of good info, you just have to sift it out.
As for tube and pipe, for the most part they are made of the same stuff, but the tolerances are much more rigid fro tube which means better control of uniform strength requirements.  This is why tube is used structurally, because you can trust that the allowables for which you are calculating will be consistent over the entire length and circumfrence of the tube.  Pipe can vary too much which isn't so much of a concern for fluid movement as the pressures aren't enormus (sp?) and the worst case is a leak, not falling on someones head, etc.

[Doof [OP]]

i know they do, its just a huge forum to navigate through



thanks for tube/pipe info

[Rubijon]

It's a pipe bender, not made for tubing.  Tubing and pipe are measured different.  Most of the tube and pipe jobs I've seen come from the HF pipe bender have kinks in them.  You can pack the pipe with sand and cap the ends to minimize the kinks but nothing totally helps.

I was talking about the notcher

[Doof [OP]]

that would make life so much easier for welding tube joints, i use a grinder and a disk, not fun and comes out retarded

[Volcom]

I was talking about the notcher

Gotta, sorry about that.

[kneedownnate]

It's a pipe bender, not made for tubing. 

You guys are missing where I said notcher   It looks like it's really only a jib to hook your drill motor to, or hooks to a drill press maybe.  Not like there are lots of electrical parts to fail.  I've had decent luck with harbor freight tools, but I've broken my fair share also.  When it matters, I buy crapsman or mac.  I spend about $80 a month on tools from mac, and that doesn't count what I get from sears either