Welder's double certificate, namely welder's qualification certificate and welding professional grade certificate, is a necessary certificate for every welder. This paper will introduce the division of welder qualification certificate and welding professional grade, as well as the details of welder skill requirements.

Welder qualification certificate

Welder's qualification certificate is the welder's "job certificate", which is issued by the safety production supervision and management bureau and is used all over the country. Whether it is electric welding, gas welding, arc welding or electric welding and gas cutting, this certificate is essential as long as it involves welding and hot cutting operations.

Classification of welding occupations

Welding professional level is divided into five levels: primary, intermediate, advanced, technician and senior technician. Each level has different skill requirements and job content. Primary workers mainly involve manual arc welding and gas welding and gas cutting methods, mainly welding low alloy steel; Senior engineers need to focus on welding cast iron, nonferrous metals and dissimilar metals. Technicians and senior technicians focus on special welding methods and new materials, and their technical requirements are more exquisite.

Welder skill requirements

From elementary to advanced, each level has its own specific skill standards. In the primary stage, we mainly master single-sided welding and double-sided forming of flat butt joints; In the intermediate stage, we should increase the skills of vertical welding, horizontal welding and vertical fixed pipe butt welding and double-sided forming on this basis; In the advanced stage, it is necessary to master the overhead welding of flat butt joint, the horizontal fixation of pipeline, and the one-sided welding and double-sided forming of pipeline with obstacles.