This is a very common occurrence in Thailand. Many boats keep their tanks on the boat for 10 years or so, never washed never inspected and never hydro,d until there is a problem like a tank leak from the tank body due to corrosion or an issue with the valve. Often a new LDS owner steps in and has all the tanks tested. What one then finds is many of the tanks then fail due to valves seized in, tanks with air leaks from the tank body (yes). In completing a hydro course I witnessed the normal requirement to get many valves out of the tanks, by the use of a heavy steel plate fitting over the valve with a 2 metre handle and a hammer hitting pad. Strap the tank down, fit the removal tool get someone to swing on the 2 metre handle and hit the hammer pad with a large hammer. Often it rips the corroded thread out of the tank. One tank had an air leak from the side of the tank, corroded through from the inside due to corrosion from salt induced air.
Not it all dive shops or boats are like this but enough in the country to be a worry. I assume there are a number of other countries similar to this.
Now Consider all these untested tanks on a dive boat, a 5 metre fill whip (corroding due to steel fittings) pumping tanks with divers everywhere on the dive deck, a recipe for disaster.
Not it all dive shops or boats are like this but enough in the country to be a worry. I assume there are a number of other countries similar to this.
Now Consider all these untested tanks on a dive boat, a 5 metre fill whip (corroding due to steel fittings) pumping tanks with divers everywhere on the dive deck, a recipe for disaster.