It is a necessary certificate of employment, no certificate will not work, the certificate with a magnetic card, nationwide. 2) Quality and Technical Supervision Department issued the "special equipment operator certificate. The industry is also known as the "high-pressure welder certificate" or "pressure vessel welder certificate". High-pressure welder, the examination is divided into projects, you can weld what material, what position, what type of weld, are shown in the examination qualified project. According to their own work needs to choose the examination program. Engaged in this type of staff, is also required to be licensed. Pressure vessel welder's license is issued after the examination of the Technical Supervision Bureau, it is divided into items such as: flat welding, vertical welding, all-position welding, pipe plate welding, etc., a lot of items, there is no pressure vessel welder's license of the welder can not engage in the welding of pressure vessels and pressure piping.
3) Ministry of Human Resources and Social Security issued by the welder's grade certificate, grade certificate is a laborer has to engage in an occupation necessary knowledge and skills of the certificate. It is the qualification certificate of workers seeking employment, employment, business, is the main basis for employers to recruit and hire workers, but also overseas employment, foreign labor cooperation personnel for skill level notarization of valid documents. There are five grades: elementary worker, intermediate worker, senior worker, second-level technician and first-level technician. In some organizations, the occupational level is linked to the position level. This certificate according to my actual situation to choose whether or not to need, there is a need to test again.