Thinking of replacing ASME propane tank

I changed out a tank on previous Class B van I had. I scraped and painted the old tank for a few years but finally decided to replace the tank because the steel shield under the regulator etc had rusted through notwithstanding my painting (lots of road salt used up here). Perused Manchester's web site and selected a new tank the same size and shape as the old one and had a local RV dealer order it for me. Pretty straight forward to drop the old tank and mount the new one. Only small issue was that the mounting holes for the new tank were in slightly different locations but I had a welding shop make a couple of transition brackets out of angle iron. I would think a pretty simple job for an RV dealer with a maintenance shop. Need to have the new tank purged of air and water vapor before use.