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Something New to Worry About - Propane Hazard
I came across this warning regarding the use of "exchange" propane tanks. It appears to be legit - anybody who uses an exchange propane tank on their boat should be aware of this information:
Propane Tank Safety Alert Methamphetamine is a very addictive stimulant drug. Manufacturers of this illegal substance are using propane cylinders for the storage and the use of anhydrous ammonia. The meth producer,
or "cook," will buy propane tanks from the exchanges at Wal-Mart, Kroger, or other local stores and empty them of the propane gas. They can then fill the propane tanks with anhydrous ammonia, which they require to "cook" Methamphetamine. After they are finished with the propane tanks, they will return them to the store. The stores may refill the tanks with propane
gas, unknowing to them that it had been used for other than propane, and sell the consumer. Anhydrous ammonia is very corrosive to the brass valve in a propane tank and it will weaken the structure of the brass valve and the tank. It can be very dangerous when mixed with propane gas
and hooked up to a grill, recreation vehicle, etc. as it can deteriorate the valve and can lead to violent, unexpected release of gas from the valve.
The National Propane Gas Association recommends inspection of the propane tank for any blue or greenish residue around the valve areas, especially if you utilize "Propane Tank Exchange"
programs. If there are evidences of these residues and substances, do not purchase or rent the propane tank and advise the vendor of your findings. Check out the following website for additional details and pictures.
(dubUdubUdubU.npga.org/i4a/pages/index.cfm?pageid=529)Propane Gas Association