The processing facilities are who wnt accept a sealed cylinder, I've posted this before but those of you in good with your yard ask them about the sealed cylinders that people sneak in or just leave because they are not accepted. My yard gives them to me I cut tem in half and sell them back, today I got a Gaylord 3/4 full of aluminum fire extinguishers and medical oxygen tanks, trust me its pretty nice to get a pick up where you sell your scrap