A-20.01, r. 1 - Regulation respecting pressure vessels

Full text
41. A safety or relief valve that has been altered, assembled, repaired or set shall be sealed by an inspector or by a person mentioned in the pressure vessel quality control program. This person shall indicate on the seals, the name of the enterprise and on the valve, the pressure and the date of adjustment. A card indicating the characteristics of the valve, the completed repairs and the name of the user must be kept by the enterprise having an approved pressure vessel quality control program and shall be produced upon the request of an inspector.
O.C. 2519-82, s. 41.