Keep in mind your threaded couplings/endcaps will likely be the weak points...
Quote from: sperho on March 08, 2013, 01:56:42 PMKeep in mind your threaded couplings/endcaps will likely be the weak points...That's what I'm thinking. There should be enough "beef" around these points to ensure safe use to 3,000 psi or so.
Thank you, sir! That info is quite gratifying. I'm still not sure how to approach the project, but that kind of safety margin should cover for many beginner mistakes as far as the air reservoir / pump tube goes. It will make for one heavy piece, but somehow anything I make tends to end up that way. There was the time that I made up a homebrew muzzle loader, years ago, and used a piece of extremely dense brazilian hardwood for the stock. It took two men and a boy to carry it but recoil was practically non-existent!
Quote from: AmBraCol on March 08, 2013, 01:54:19 PMThank you, sir! That info is quite gratifying. I'm still not sure how to approach the project, but that kind of safety margin should cover for many beginner mistakes as far as the air reservoir / pump tube goes. It will make for one heavy piece, but somehow anything I make tends to end up that way. There was the time that I made up a homebrew muzzle loader, years ago, and used a piece of extremely dense brazilian hardwood for the stock. It took two men and a boy to carry it but recoil was practically non-existent!I believe you are going after what is called in the engineering world, a "Robust design", which translates into too darn heavy to lift, LOL.A53 and A106 are 2 different specs for similar kinds of welded/weldable steel pipe. The Grade B in both of them has a yield spec of 35ksi, and sampling testing of hydrostatic to 60% of yield, or up to 2,600 psi, whichever is less. In this case the 2600 psi is definitely the lesser.Your pipe weighs over 3 lbs/ft, and seems to be up to the task, but I am curious why you really want to use it? You can get A513 Ty5 DOM steel tubing very inexpensively, and in small quantities, which has a yield twice as high at 72ksi and a smooth I.D. and eliminate probably 3/4 of the weight. You can choose the thickness you need for the job. Just a thought.Lloyd-ss