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How long does an oxygen cylinder last and does it have to be re-certified on a periodic basis?

April 26, 2017basis cylinder oxygen periodic re-certified

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How long does an oxygen cylinder last and does it have to be re-certified on a periodic basis?

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The oxygen in a cylinder can last indefinitely. In the US, the DOT requires that aluminum cylinders be hydro-tested every (5) years, and steel cylinders every (10) years.