Old, not bold diver
- Reaction score
- Colorado Springs, CO
- # of dives
- 500 - 999
Star service (10 year hydro) can specifically NOT be applied to cylinders in banks that never get moved. Star service requires a hammer test be done on the cylinder at each and every fill -- literally striking the cylinder with a hammer and seeing if it rings like a bell.padiscubapro:Industrial cylinders normally have a 5 year hydro date unless they have a star then its 10 years.. This also applies to cyinders used in banks that never get moved (unless they are asme cylinders in a permanent installation then they never need recertifaction).
Cylinders in a bank "that never get moved" cannot be tested in this way before each fill (every time the compressor runs) so they cannot be star service rated.
This is a commonly overlooked requirement for star service, and cylinders with a star service rating are routinely found in banks because of the desire to only tear down the bank every ten years instead of five, violating the additional requirement (the hammer test) that star service entails.