tube or pipe

Im not sayin or arguing the properties of pipe is correct for structural use..........but its strong shit. it's not going to give you any problems making a wish bone from it.  i built a complete front subframe on my old civic from 1 1/4" pipe and daily drove that shit.   

I'd stick with tubing and leave the pipe for plumbing.

I didn't believe him, but the person at the steel yard by me says that the mechanical properties are the same as mild steel. I asked him this while trying to find tubing that fit snug inside a piece of tubing I was using, and PIPE was the tightest fit. I went another route anyways but they told me it's the same.

Because im not an expert, I just did some research........ The only reason pipe is not considered for structural use is because of how it is measured differently than tubing. Other than that....its the same shit btw im just sharing the info i found and not trying to be a know it all.

Pipe vs Tube     What's the difference between a pipe and a tube?     More often than not, people guess it has something to do with the quality of the materials, but that's got nothing to do with it.  The difference between a pipe and a tube is how they are measured, and ultimately what they are used for.       A pipe is a vessel - a tube is structural.     A pipe is measured ID - a tube is measured OD.     How they are measured...  Pipes are measured ID or inside diameter because they are vessels.  Tubes are measured OD or outside diameter because they are structural.       Pipes have a consistent ID regardless of wall thickness.  In other words, a 1/2" high pressure pipe may need a 2" thick wall, but the ID will still only be 1/2" even tho the OD is 4.5".       Generally speaking, a tube will have a consistent OD and it's ID will change.  Engineers see tubes and pipes with different eyes.       A tube is structural.     By having a consistent OD they can vary wall thickness, changing the ID, to increase strength.  Because they are consistent OD, they have predictable characteristics.       Again, the difference is simple, it's how they are measured and what their intended uses are.

What's the difference between Tube and Pipe?The general term for pipe was that it was primarily used for carrying gas or liquid. It was not intended for structural use because the dimensions used in describing pipe was not dimensionally accurate. Measurement was referred to its inside diameter and wall thickness. The inside diameter was a true dimension, but over the years had become "nominal" (in name only) so that when pipe size was referred to, it was an approximate inside diameter measurement with the thickness described by the term "schedule".

so there you have it. as long as the wall thickness is enough, your good to go.

kool deal thx guys. i guess ill go ahead and build it unless i find some better stuff.

Max has answered this question before im pretty sure...something about the amount of carbon used when making the 2...there's more carbon in pipe which makes it cheaper to make...but more brittle when welded too...ima look for the post....

dom is the same thinkness all along the tube...the lowes pipe is not the same thinkness along the pipe it gets thin in some spots...but i did wonder if this would be ok for like some upper bars or something that will not take the much load like gastank,compressor, air tanks...just anything not real heavy or need to be strong just not to waste the good stuff...cause on xtream 4x4 on spike they said its ok to use dom in the bends and ok to use the welded seam tube in the stright runs in the feild...but i would never use pipe for something that is going to take a lot of load