RVers use a great deal of propane and so do drug dealers. The problem is drug dealers who manufacture methamphetamine, also known as "crank" the popular illegal drug that rots your teeth, are using exchangeable propane bottles to store anhydrous ammonia during the manufacturing process. When they return the bottles to the exchange rack at the store they are endangering future users because they have compromised the safety of the brass valves. A blue-green color on the brass service valve is evidence that it may have been in contact with anhydrous ammonia. Here is what the safety bulletin says, "The brass valve in a propane cylinder will be damaged if it comes in contact with anhydrous ammonia. This deterioration will lead to cracking of the valve body or its components and can ultimately result in a violent, unexpected expulsion of the valve from the cylinder, causing personal injury or death." Sounds serious to me and you can see photos and read more about it at the National Propane Gas Association website here: Safety Bulletin The best advise is to refill your own propane tanks and not use an exchange bottle. However if you do use exchange bottles or pick one up at a yard sale be sure the brass valve is not a blue-green color. Hat tip to my friend Bruce Suckow for the lead on this article. Keeping an eye on your safety - Jim Twamley, Professor of RVing

3 comments:
Those who use these tanks for barbecue ovens, lanterns, outdoor heaters, and generators, etc., should also be notified.
It is crack, not crank
NOTE: if you find a propane tank, by no means open the valve and smell to see if it contains propane, if Anhydrous Amonia was put in the tank and some remains it will burn your lungs, IF you come upon a container while walking DO NOT pick it up and CALL the Local Law Enforcement Agency, Let them decide what it contains, do not injure yourself for life! From Retired LEO.
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