So I am getting ready to redo the plumbing on my 88.  The tractor has a Farmhand F-11 loader on it.  The Farmhand has piping on it for the long runs, and hoses for the short connections.  The pipe LOOKS like regular 1/2&quot; galvanized steel pipe, as far as I can tell.  

My Question is this:

Does anyone know if this is the case?  I want to run a couple of hard lines for a front remote, and a rear remote on the tractor, and I can do it easily with black pipe or galvanized.  BUT, when I was checking prices on pipe, I ran across mention that the pipe is only rated for 214 PSI.  Found other references that it was only rated for 150 PSI.  

I am confused.  I am a Helicopter Mechanic by trade.  We run 3000 PSI in Aluminum Tubing...I cannot for the life of me see why nice heavy STEEL pipe is rated so low.

Thanks in advance.

Offio