Just to further complicate matters .
Some of use divers have a variety of tanks . We use steel and aluminum tanks . I have somewhere north of 20 myself .
There should be no moisture in a properly filled tank . Steel tanks are currently in voque . They don't change their weight between full at 3000 psi and empty like an aluminum tank does . 4 pounds differance . Some older aluminum tanks are not supposed to be refilled per DOT regulations .
There was a an aluminum alloy that allowed the tank to stretch after some many refills . This lead to tanks shattering while being filled .
This is quite likely the reason most places are reluctant to take on the liability of testing a CNG tank they aren't familiar with .
It is also quite possible they do not have the correct permits for testing the tank type . I hope this helps
Some of use divers have a variety of tanks . We use steel and aluminum tanks . I have somewhere north of 20 myself .
There should be no moisture in a properly filled tank . Steel tanks are currently in voque . They don't change their weight between full at 3000 psi and empty like an aluminum tank does . 4 pounds differance . Some older aluminum tanks are not supposed to be refilled per DOT regulations .
There was a an aluminum alloy that allowed the tank to stretch after some many refills . This lead to tanks shattering while being filled .
This is quite likely the reason most places are reluctant to take on the liability of testing a CNG tank they aren't familiar with .
It is also quite possible they do not have the correct permits for testing the tank type . I hope this helps
