Instructables

Propane in air compressor hose

Does anyone know how a regular (150psi rated) air hose will stand up to propane? I'm curious as to whether it would dissolve it.

dmcgraw75 years ago
Years pass... Most propane fills also contain butane. The cheaper air hose is PVC and butane softens PVC so stay away from that. The better air hose is polyurethane. Polyurethane is probably ok for short-term propane use, but it will dry out, crack and leak sooner than the correct hose. Propane leaks are a bad thing because propane is heavier than air and will pool up in a boat, RV or truck bed. Butane/propane rated hose is a nitrile (aka Buna-n) tube reinforced to a 350psi working pressure. Nitrile has excellent resistance to petroleum-based oils and fuels. PU 300psi air hose can be had for less than .50/ft. Nitrile 350psi hose is $2 to $5/ft. I wouldn't use PU in a boat or RV or anywhere propane could pool up, but I might use it with a weed burning torch or something that is only used infrequently. It's always a pain to figure out what plastics and elastomers are appropriate. I found this site to be helpful: http://sealingspecialties.com/materials.htm.
Austringer6 years ago
What are you trying to do and how far do you have to go with it? Copper refrigerator tubing with a regulator on the tank end of things and two swage lock fittings would be my advice.
Hegemone (author)  Austringer6 years ago
It's actually for a propane fumigation system for a diesel engine...has to run from the bed of the truck forwards. Just wondered what I could get away with when that long of a section of propane hose would cost near $100...wonder what the pricing on a section of copper would be.
jonjr6 years ago
I say cut the hoses open and see what the propane hose has that a air compressor hose does not and if there the same then you might have a winner. hope this helps
NachoMahma6 years ago
. There is a good chance that the propane will be incompatible with the air hose and the "rubber" will decompose. It may work temporarily (a day or two), but is not safe for long-term use.
Goodhart6 years ago
Solubility sounds like a possibility.....Benzene, propane, methane and vulcanized rubber...
guyfrom7up6 years ago
it'd probably melt, you need something like a silicoln tube
Hegemone (author)  guyfrom7up6 years ago
I didn't mean for heat, unless you're meaning that it would 'melt' it chemically. I'm just curious if it will stand up to it chemically if the pressure is within tolerable limits. I want to see if i can get away without paying $150 for 10 feet of propane rated hose.
it should, but don't hold me responsible.
Hegemone (author)  guyfrom7up6 years ago
I know the risks of improvising. If i screw it up, it's my own fault. You're liability is removed. lol.