51. In enterprise having a pressure vessel quality control program, a certificate is issued at the time of the initial qualification only, whereas in the case of other enterprises and also in the case of personal qualification, a welding qualification certificate is issued for a 2-year period.
In order to maintain a valid certificate for a specific process, a welder must in all cases use that specific process without an interruption of more than 6 months.
(Replaced as regards the personal qualification of welder).
O.C. 2519-82, s. 51; O.C. 977-96, s. 9; O.C. 280-2006, s. 49.