[oldguy70]

Crusher

I use all aluminum for my cylinders the tube is usually .064 wall and the ends are welded in with a welding rod that uses propane or map gas torches. Many laugh at me but the cylinders take 300PSI as this welding rod when used properly makes the weld stronger than the original aluminum. I usually clean up the inside of the tube with 600 grit sandpaper and scotchbrite the seals are neoprene u cups.
If anyone is interested the welding rod comes from Weeks Distributors in the states. All my models are welded together with these rods saves the expense of a welder and power to run it.

Earl