Whoooshhh!
Sounds like someone is building a "Pumpkin Chucker!"

--your not going to propel any dead chickens thru airplane windsheilds are you??
Be aware the propane fumes linger for a long time!--one guy I read about in the paper burned his beard off while using a converted tank on his compressor--he was using an impact wrench to change a tire while smoking a cigar...WHOOOF!..lucky for him it only flashed up for a second or two!-I bet a tank the size of yours would level a house no sweat--my dad worked with LNG and propane most of his life--
They had posters of disasters tacked on his office walls showing the carnage when semi's hauling LNG hit bridges,or other cars--one tanker took off like a missle and leveled a huge building,only a pile of bricks left...another one showed a car a guys wife had put a 20lb gas grill bottle in the trunk that was leaky,and her talights set it off!--only the frame remained,with the floor of the car on it--the rest landed 300 ft away in a parking lot,she was blown to hamburger,and another person in the car it landed on was killed too.
--they showed a large department store a robber was cornered in,he used a regular propane torch tank to blow a huge hole in the roof by letting it all leak out until it was empty and lit a carboard box with a match--he got killed!,and many shoppers were badly injured..
..I'd pump up your tank and purge it out in a safe place at least a few times before using air tools or sandblasting with it--I see sparks come off metal thats being sandblasted all the time..you dont want your sandblaster to become a flamthrower....

--after the residual fumes dissapate it should be safe to use as an air tank--but the sulpher smell will linger a long time after.... your neighbors will hate you!!..
