1, welding grade is to go through the learning assessment to go through a professional college, now there are many training points (schools) have welder training grade the higher (Bureau of Municipal, Ministerial, Provincial) grade certificate the more hardcore.
2, to first have a primary certificate (operating license) as long as you can operate.
3, two years and then read (test) intermediate certificate to learn welding theory and welding skills.
4, two or three years and then read (test) advanced certificate to learn the principles of welding.
5, two or three years and then read (exam) technician to learn welding and invention, to be written by the actual paper. There are experts to identify your learning (thesis) and practical operation.
Electric welders must be professionally trained and qualified by examination before they are allowed to work, non-electric welders are strictly prohibited to engage in electric welding operations. Operation should wear welding overalls, insulated shoes, wearing welding gloves, protective masks and other safety supplies. High-altitude work must be fastened with a safety belt.