1. The ordinary welder's certificate is actually the welder's work certificate. The purpose of training and obtaining evidence is to let welders know the most basic welding principle and safe operation knowledge.
2. The pressure vessel welder certificate should represent the welder's operating skill level. The purpose of training and obtaining evidence is to enable welders to master the basic knowledge of pressure vessels, welding principles and equipment, requirements and inspection methods of welded joints of pressure vessels and welding operation skills to meet the requirements.
Based on the above, it is not difficult to see that the examination difficulty and cost of pressure vessel welding certificate are higher than that of ordinary welding certificate.
Here, the welder's license is 200 yuan. Pressure vessel forensics is 3500 yuan, and how many stops are counted. Unqualified stations need to be retaken. Carbon steel is 800, stainless steel is 1500.