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Old 08-10-2014, 11:10 AM   #1
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Rust on the lpg tank

Are there any dot regulations pertaining to painting an lpg tank? Mine has surface rust and I would love give it a light sanding and rust treatment.

I know with some types of pressurized tanks they won't tell them if they've been painted or "visibly altered"
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Old 08-10-2014, 11:23 AM   #2
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I sanded mine and spray painted with rustoleum a couple years ago. No issues with re-filling so far. I don't know of any DOT regulations on re-painting a tank. There are regulations on color (to keep from overheating in the sun) - tanks must be a light color - white or silver. So re-paint to the original color.
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Old 08-10-2014, 11:40 AM   #3
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I was at a propane refilling station once when the attendant refused to fill a RV tank because he had painted it shinny black. They were reading a pamphlet and telling him it had to be white or a reflective light color in accordance to with the National Fire Protection Association (NFPA 58).
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Old 08-10-2014, 12:36 PM   #4
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So if I put a coat of rust neutralizer on then painted it a silver similar to the original color it will be ok?
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Old 08-10-2014, 12:57 PM   #5
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Quote:
Originally Posted by Sthwindrider View Post
So if I put a coat of rust neutralizer on then painted it a silver similar to the original color it will be ok?
That's my plan. My tank is light grey, but peeling and rusted.

Logically, I suppose, the color regs should not have to apply to large RVs where the tanks are mounted in a closed compartment, but I guess it's possible for the compartment door to be removed, thus exposing the tank to direct sunlight, so I'd go with a light color.
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Old 08-10-2014, 01:06 PM   #6
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Should be, Best not to change color (Shade yes but color no)

I'm not sure of the long term effect of the rust neutrulizers but .. Strongly suspect you won't live long enough for that to be a problem (Say 100 years from now).
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Old 08-11-2014, 07:13 AM   #7
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DOT regulates removable bottles (Towable units).
National Fire Protection Agency regulates ASME tanks (mounted and permanent)
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Old 08-11-2014, 09:46 AM   #8
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My 1997 LPG tank was covered in surface rust, to the point it was difficult to tell it was ever painted any color. I closed the valve and used my electric grinder to take off 95% of the rust, then painted with Rustoleum primer, then white. It looked like new when done and 2 years later it still looks great.
A cheap fix and worth-while.
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Old 08-11-2014, 01:26 PM   #9
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Thanks for the input, looks like I'll be tackling that job later this week
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