Section 58(8)(b) in Rajasthan Factories Rules, 1951
(b)(i)The minimum thickness of the shell of a sizing cylinder shall be actually measured as and when possible.(ii)If during its working life the shell of a sizing cylinder is at any time punctured requiring repairs to the cylinder to close the punctured portion, the thickness of the sheet of the shell near such puncture of opening shall be measured by a competent person and the record maintained in Form 9.