It is not allowed to buy electric welder certificate. According to the relevant regulations, the welder certificate is a work certificate, which can be handled only after passing the examination. The welder certificate shall be issued under the unified supervision and management of the Emergency Management Department. The validity of the new welder certificate is six years, and it shall be reviewed every three years.
 Legal basis
 Article 51 of the Law on the Safety of Special Equipment, the inspection and testing personnel of special equipment inspection and testing institutions shall be assessed and qualified as inspection and testing personnel before they can engage in inspection and testing. The inspection and testing personnel of special equipment inspection and testing institutions shall not practice in two or more inspection and testing institutions at the same time; If the practice institution is changed, the change procedures shall be handled according to law.