Rusty propane line

Question

I have been trying to get a few rust spots off of my TT frame and bumper...looked under the trailer and noticed the propane line (galvanized?) looks completely rusted.  Is this a problem?  I brushed off one section with a wire brush and applied Ospho to convert the rust.  Do I need to protect the rest of the line in a similar manner?  Maybe this is overkill but I'm going on the notion that no rust is good.  Anyone run into this, what have you done?  Thanks!

westend · Answer

Probably a black iron pipe and they do rust. Your call on how much rust is acceptable. I have one under my rig and it does have some rust. It is 44 yrs old this year.

gordonthree · Answer

Should be black iron and not galvanized. I forget why, but you're not supposed to mix zinc pipe and natural gas. Paint it if it looks ugly. It'll take the rust forever to eat through.

hbillsmith · Answer

Naval jelly to remove the rust. Wire brush to finish the cleanup. Then black rustoleum spray paint. Totally not needed but sure looks a lot prettier.

mobeewan · Answer

GordonThree wrote:Should be black iron and not galvanized. I forget why, but you're not supposed to mix zinc pipe and natural gas. Paint it if it looks ugly. It'll take the rust forever to eat through.They worry about flakes of the galvanizing material coming loose inside the pipe and blocking flow to the appliances.

69_avion · Answer

mobeewan wrote:GordonThree wrote:Should be black iron and not galvanized. I forget why, but you're not supposed to mix zinc pipe and natural gas. Paint it if it looks ugly. It'll take the rust forever to eat through.They worry about flakes of the galvanizing material coming loose inside the pipe and blocking flow to the appliances.That is correct.  The galvanized flakes can clog the orifices in the appliance.

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Rusty propane line

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