As per MSC.1/Circ.1452, all breathing apparatus cylinders, independent of their construction material shall be hydrostatically tested at 5-year intervals, unless the manufacturer specifies a shorter period.
The BMA is of the opinion that air cylinders fitted in lifeboats with a self-contained air supply, in compliance with paragraph 4.8 of the LSA Code, are meant to provide breathing air and should therefore be maintained to a similar standard as breathing apparatus cylinders, including hydrostatic tests at 5-year intervals unless the manufacturer specifies a shorter period.