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Old 04-26-2015, 01:42 PM   #57
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Is it Evil to Paint Aluminum Tanks ?

They kinda look like rock guards, but it is actually bed liner. I used it to cover many small dents and abrasions...

I had one place tell me they wouldn't fill the red tanks again after they had just finished filling them the second time....

Imo the red paint does not get as hot in the sun as the bare aluminum... But it isn't my opinion that matters.

It is a urethane paint, cured at room temperature.

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Old 04-26-2015, 02:18 PM   #58
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Originally Posted by J. Morgan View Post
Imo the red paint does not get as hot in the sun as the bare aluminum... But it isn't my opinion that matters.
Easy to prove.

Fill one of your red-painted cylinders. Fill an otherwise identical unpainted aluminum cylinder. Put a thermometer on each cylinder. Set them side-by-side in the sun and record the temperatures of each cylinder over the course of a bright sunny day, say about once an hour. Make sure neither cylinder is shaded by the other.

Switch the thermometers around and do it again the next day so that each cylinder has been measured by each thermometer.

If your hypothesis is correct and the red cylinder stays cooler than the bare aluminum one, you'll have documented evidence of the fact.

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Old 04-26-2015, 02:44 PM   #59
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Reputable propane dealers in Texas that follow the Texas Railroad Commission's rules will not fill propane cylinders unless they are white, silver or bare aluminum.

I had a customer that bought one of those red cylinder special Airstreams from ebay. I went to all local propane dealers and none would fill the red cylinders.

Might not be like that everywhere, but I wouldn't want to go through the hassle.

I like shiny aluminum cylinders.

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Old 04-27-2015, 03:03 PM   #60
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Typically LP tanks are painted with silver paint. Years ago I went to my local Propane gas company and bought silver colored allumi-lead(not positive) but this should answer the question:
"The answer to this question is yes. Can you paint it any color you want? No. NFPA 58 states that propane containers must be painted a heat reflective color. Most state regulatory agencies have their own rule addressing this particular issue but the national code declares that LP Gas containers must be painted a heat reflective color unless installed in an extremely cold environment." The last thing you want to happen is a tank over heating and venting through the pressure relief. has a few choices.

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