根据原国家劳动总局颁发的《锅炉压力容器焊工考试规则》中第三章第8条“焊工在生产过程中焊接质量一贯优良,经过考试委员会审查并报地、市以上劳动部门同意后,可以免予重新考试,将有效期延长两年。但不得连续 According to the former State Administration of Labor issued the ”boiler pressure vessel welder examination rules,“ the third chapter of Article 8 ”welder in the production process of welding quality has always been excellent, after the examination committee and report to the newspaper, the city above the consent of the labor department, you can Exemption from re-examination will be extended for two years, but not continuous