How SCUBA Cylinders are Hydrostatically Tested

Today, we're discussing how cylinders are hydrostatically tested. Here at Extreme Sports we only use the highest-quality technology to perform tests on our customers as well as our own cylinders. A BIG THANK YOU to Grant at Marmic Fire for allowing us to record his process in his facility.
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[@sickle40]

nice job gretting from Chile

[@ExtremeSportsScubaMO]

Thanks for the kind words!

[@larlario289]

water is used because air/gas is compressible.

[@drakeweston1031]

Actually liquids are compressible as well. Just less than air. All molecules are compressible. This is how we’re able to control the pressure of water inside the hydro chamber. Water is used because it takes less than 30 seconds to compress it vs ~10 min for air. Air also creates much more heat due to its density.

[@drakeweston1031]

That’s how CNC machines work, by compressing water.

[@larlario289]

@@drakeweston1031 yes of course. the context is fluid relative to air.

[@spoofer20]

@@drakeweston1031 bro... What? Water is regarded as incompressible, at my work we test hoses up to 20k psi or more and there is around 0% compression on the water in the hoses, if the water was compressed the pressure would drop.

[@carterlybarger7885]

The hydrotester is my dad lol

[@angelfrancisco7057]

Which standard do you apply for hydrostatic test?

[@ExtremeSportsScubaMO]

What are you referring to as standard? This is just a DOT standard in the US.

[@davidpeterson2961]

At my hydro testing facility I’m testing about 1,000 cylinders a week