"George" wrote in message

I know a few friends whose insurer required tanks to be replaced only
because of age. It also lessens further risk because all new interior
tanks are double wall.

I'd change insurers. They are welcome to come and inspect my tank, but I'll
be damned if I'm going to replace a perfectly good tank just because it hit
a certain age.

Our insurance company at work (as well as state law) requires we inspect our
air tanks every two years. It takes about 5 minutes to do an ultrasound on
one. Much cheaper that scrapping good material.