|
South Texas | Lots of metal buildings and cattle pens around here less than 30 years old made from oilfield pipe rotted from the inside out. Then since the stuff was meant to be not welded it'll crack in the heat affected zone next to the weld, or if you don't use 7018 it just falls apart fast. You might as well use sucker rod for runners too so you have another metal that's not meant to be welded so it can have more places to crack. I have replaced trusses on otherwise good looking buildings. I consider myself lucky my oilfield pipe pens haven't rotted out, just have to weld up the cracks every few years. You can get lucky with the oilfield stuff, but too much risk of having to redo all your work if you get bad stuff. I won't mess with the junk, new pipe only.
Not sure what your doing that calls for 3.5" pipe. Far as how long it's going to last think thickness has more to do it. I build pens, fences, such from 2" sch40, 2 3/8" OD. | |
|
Steel Pipe for post
