Originally Posted by Ironworker709
The only REAL difference is the way it is measured, a 2" TUBE is measured 2" outside to outside....
A 2" PIPE is measured 2" from inside to inside edge.
Most people don't know much about how strong pipe really is for the fact the popularity of using just TUBE for jeeps and 4x4's because it's a little easier to measure for simpe fabrication for the hobbiest.
You can get DOM tubing AND pipe..
You can get welded seam tubing AND pipe..
You can get chromolly in both...
Any process of tubing made is also made in pipe.
In the past 30+ years i've been an ironworker i've welded..fabricated and put up PIPE being used for structural purposes on bridges..power plants..buildings..etc etc designed by some of the BEST engineers in the world..it just all depends on the availability and price of which they decide to use.
If you want to get technical,,a 2" PIPE is stronger than a 2" TUBE made of the same material and process..pipe has the larger diameter than the tube....
I made both my bumpers from schedule 40 2" PIPE...i've YANKED HARD on them pulling myself and other vehicles out of mud holes..SLAMMED into trees and river rocks with them...and recently rolled my jeep on it's side when i hit a tree so hard it flipped it from the front bumper hitting the tree..and to this day they have no kinks or bends in them,just several different coats of paint from the abuse..lol
You can get PIPE dies for the same benders used for tubing and vise versa
Ironworker709 is correct in many ways....
I feel the need to add my 2 cents because I have read several posts about pipe vs. tube. I personally would use tube for things like roll bars, but pipe is definitely okay for a bumper. for one reason, you are going to need a larger quantity of tube for a roll bar so you are not likely to use scrap. For a bumper, you only need a small amount and scrap is a likely choice. Either one is going to bend if you hit something hard enough. You'll probably bend the frame first anyways. The strength to weight ratio for tube is better so the more you use, the more weight you save. And if you are going to use it to save your life in a roll, get the tube.
...and pipe is a stuctural shape. I specify sch 40 pipe for columns all the time in my designs...I'm a Structural Engineer.