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All scuba cylinders are cleaned for oxygen and oxygen-enriched service at the factory. If you intend to use a cylinder for oxygen and oxygen-enriched service (i.e. with any gas containing oxygen concentrations of 23.5% or more), all components used with the cylinder must be oxygen compatible. It is the responsibility of the cylinder user to ensure that the cylinder and all components are maintained in a proper state of oxygen cleanliness in strict accordance with regulatory requirements and industry standards.
• DOT mandates strict pressure limit. Gas pressure in an aluminum cylinder containing enriched or pure oxygen (oxygen concentration of 23.5% or more) must never exceed 3000 psi.