So the jury is still is out on that tank. I had a room full of PSI instructors and it still could go either way. Luis also looked at it and I think he said it's also questionable. Not sure if he want's to comment?
The pitting covers a large area on the bottom of the tank but it seems very difficult to determine the depth.
Someone suggested I have the tank sandblasted to see if it would make it easier to determine the extend of the damage. Because I was given these tanks for free, I'm thinking of maybe investing a little more money into this project.
One thing I gathered from my VCI class was that it seems very hard to make this type of determination. If the damage or pitting is bad/significant then there seem to be no questions whether to condemn the cylinder however it seems in a situation like this, it's very hard to make the determination and falls back to best judgment and guessing.
This is what scares me the most. I could conceivably bring this into another shop and gamble my chance of them slapping a sticker on it or even just do the inspection myself. Both would be stupid in my opinion, I guess I'm just being stubborn since I would really like to save this tank.