Galvanized Pipe for Hydraulic Lines?

[Bobus2003]

I  was gettin some pipe to Re-route my Hydraulic lines on my Link Belt for the Processor head.. I was gonna replace it with the same as came off of it 1" Galvanized pipe.. But I was told when I was getting it that I cant use Galvinized Pipe with Hydraulic Oil cause it will break down in the oil and possibly have Galvinized flakes floating through the oil.. I was told to use Black Pipe instead.. any truth too this? Part of the arguement on the Galvinized is that the Filter will pick up any flakes taht may get into the oil.

[LeeB]

I would be wary of galvanized more due to the pressure rating than any thing else and black pipe as well. Make sure you get a high enough grade to handle the pressures you are working with.

[Dana]

Bobus2003 I have never used galvanized pipe in a hydraulic system for the reason you mentioned. I Googled galvanized pipe for hydraulic lines and came up with this link that is in agreement with that thought. http://www.hydraulicspneumatics.com/200/eBooks/Article/True/24755/

[Dan_Shade]

i would not do that.

plumbing pressures are much less than equipment hydraulic pressures

[pineywoods]

I used 1/2 inch black pipe on all 3 of the woodmizers I added hydraulics on. Never had a problem. Just tie the pipe down so it won't vibrate. But  I have busted my share of hoses.

[Papa1stuff]

Galvanized is a nono but black pipe is Ok ,Have used it on my grader Oked by manufacturer!

[DouginUtah]

Can anyone tell me what maximum pressure (PSI) a WM produces?  ???

[quietrangr]

I replaced all my loader pipes with galvanized two and a half years ago. No problems so far. But that flaking off thing does make sense.

[footer]

Technically, you should use schedule 80 black pipe for hydraulics, but like others have said, you might get by with schedule 40, just be aware that 1/2 schedule 40 black pipe is only rated for about 214 psig working pressure, so there is high probability of ruptureing a pipe. I wouldnt use Galvanized.

http://www.engineeringtoolbox.com/astm-steel-pipes-working-pressure-d_775.html

[Bobus2003]

I don't think I have alot of Pressure, Mostly Just Volume I think the Pressure is Developed in the head, but I could be wrong.. Havent ruptured a Pipe yet, just tend to snag them pulling them out of the brackets and bending them so they won't go back in the brackets..

Well maybe I'll just replace it all With Sched 80 Black Pipe instead of the Sched 40 Galvinized pipe

[Jamie_C]

I don't think I have alot of Pressure, Mostly Just Volume I think the Pressure is Developed in the head, but I could be wrong.. Havent ruptured a Pipe yet, just tend to snag them pulling them out of the brackets and bending them so they won't go back in the brackets..

Well maybe I'll just replace it all With Sched 80 Black Pipe instead of the Sched 40 Galvinized pipe

Pressure should be developed at the carrier and not at the head, the valve bank on the head merely distributes the pressure and flow for each function.

I'd definitely stick to the sched 80 black pipe, we run 4300 psi on our carrier and it stands those pressures fine.

[shinnlinger]

I was under the impression galvy pipe was not coated on the inside....

[wewacountryboy]

I've never seen it in the inside.

[captain_crunch]

Galvinizeing is an electric coating prosess so it is coated inside also(I have cut and threaded several miles of it in my time) The Older pipe(domestic) was lots better quality than new import(can't imagine why) All the hyd fellers I know of say NEVER use galv for hyd lines. Got to remember oil only gets to filter after it has went thru valves and cylinders

[footer]

Galvinized pipe, is galvanized for a reason.  Because it is water pipe, and it is hot dipped to coat the inside, to resist corrosion from the water flowing through it. The outside is galvinized as a result of being submersed in the molten zink. Unless there is another  form of galvinized pipe that I have never heard of, standard shedule 40 galvanized pipe is galvinized to protect the inside from water.