Eric Sedletzky
Contributor
I thought rust pits were the death of steel cylinders?It seems to me that the 72s that fail tend to be the ones that have been sitting for a long time without pressure cylces. They show up covered in cobwebs and dust, decades out of hydro, and they go way, way over expansion limit. It's not all 72s by any means but I notice that ones that fail seem to fit a pattern.
I don't see how a steel tank sitting unpressurized with spider webs has anything to do with passing or failing.
I've restored some real relics that the last hydro was 3O years ago and they sat in some widows garage for the entire time either low in air or empty. I clean them up, send them to hydro and they pass every time. I have never had a steel 72 fail and I've sent dozens through. I give most away to our new urchin divers just for whatever I'm in
Them. I don't make a profit.