Visual Inspections (VIP)
Hawaiian Diving Adventures
There are specific federal requirements and manufacturer guidelines that govern visual inspection of high pressure cylinders. As per DOT (Dept of Transportation) and PHMSA (Pipeline and Hazardous Materials Safety Administration) guidelines, we follow PSI/PCI as well as SDI/TDI standards of visual inspections.
Many divers neglect their tank valves and don’t service them until there is a problem. We recommend servicing your tank valve with each Hydrostatic Test (“hydro”). If your cylinder valve was not serviced with your latest hydro, or you do not know if it was, we can easily perform this service during a VIP. Some older valves do not have o-rings, or if you have an older valve with o-rings, we recommend upgrading to the newer kits that use Teflon washers instead of o-rings. Tank valve services and prices depend on your type of cylinder valve and its condition.
We use Eddy-Current testing (also known as “eddy testing” or ECT) to detect sustained-load cracking (SLC) in aluminum alloy cylinders. All aluminum alloy 6351-T6 tanks require Eddy-Current Testing at least every five years. However, all aluminum SCUBA and SCBA cylinders manufactured after 1990 do not use aluminum alloy 6351-T6. We generally recommend annual Eddy-Testing for all aluminum alloy 6351-T6 tanks. Steel tanks or tanks made from aluminum alloy 6061 do not require Eddy Testing.