Section 58(8)(c) in Rajasthan Factories Rules, 1951
(c)(i)No sizing cylinder shall be subjected to a working pressure greater than the safe working pressure recommended by the manufacturers of such cylinder at the time when such cylinder was first taken into use 11;1 a factory.(ii)The safe working pressure of a sizing cylinder which has been in use for more than five years shall be calculated in accordance with the following three methods and the lowest figure obtained by any of the three methods shall be considered as safe working pressure of a sizing cylinder: