Welders have national professional standards. General senior engineers require manual welding to be able to weld all positions, such as 1G, 2G, 3G, 4G, 5G and 6G, and master two welding methods: manual welding and argon arc welding. General junior workers need to be able to weld one-sided and two-sided supine positions, while senior workers require four supine positions and two pipe positions. In addition, they can weld argon arc welding or other welding methods. The theory has a theoretical outline.

Senior job application meeting one of the following conditions:

1, working experience of more than 20 years and working in this occupation (type of work) 14 years or more;

2, engaged in this occupation (type of work) 17 years or more;

3. After obtaining the intermediate vocational qualification certificate (including technical grade certificate) of this occupation (type of work), he has been engaged in this occupation for 5 years continuously, and has reached the required standard hours after the advanced formal training of this occupation (type of work), and obtained the graduation certificate.