I have the NDT certificate UT, MT and PT from CCS of classification society, all of which are Grade II. Because the pressure vessel is dry now, I hope the required unit will give a reasonable price.

First, CCS and pressure vessels belong to two different industries, and the competent departments of these two industries disagree with each other in China. So your certificate in the original industry only proves that you have such level and experience, which is meaningless for direct work.

Two, the number and qualification of nondestructive testing personnel is a necessary condition for pressure vessel manufacturing or maintenance units to obtain qualification certificates. So, you don't have any advantages in your present situation. If you want to engage in nondestructive testing in this industry, you need to talk to the employer about the advantages of your personal technical level, which basically does not constitute an advantage for the qualification certificate.