Based on special provisions of EN15085 series welding standards of railway vehicle industry

this article introduces the technical requirements followed by third party welding supervision by combining participation in the practice of railway vehicles and key system components in welding field supervision

focusing on third party welding supervision and technical support principles

and key points of quality control in pre-production preparation

first article preparation and volume production of railway vehicles. It also illustrates how to evaluate the conformity of quality condition of product in all stages of manufacturing and confirm the standardization of quality report for check and review so as to ensure the welding quality (including that quality report submitted conforms with industrial standards and requirements of welding purchaser) of final product. It demonstrates the participation of third-party on-site supervision personnel in evaluation of production weld tests and makes requirements in a scientific way in manufacturing process by considering the structural characteristics of welding product. Third party on-site supervision and technical support have the characteristics of justice

equality and professionalization

where the importance and scientific feature are more and more recognized by purchaser of railway vehicles and key system components. This article provides reliable quality assurance and necessary technical support for purchase and manufacturing of welding structure products

and references for development and innovation of high quality of equipment manufacturing.