This paper summarizes the certification systems for welders and welding engineers established and implemented by the Japan Welding Engineering Society (JWES). The scheme for the welders and the welding engineers are accredited by the Japan Accreditation Body for Conformity Assessment in 1999. Regarding the qualification system for welding engineer, welding technologist, welding specialist and welding practitioner, the Authorized National Body of Japan which are operated under JWES were established and approved by IIW in 2000 and the transition arrangements from the above certification holder has being implemented from 2001. There are unique Approved Training Body in Nagoya for the qualification system for welding engineer, welding technologist and welding specialist.
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