How to obtain the qualification of oxygen or air separation engineer?

There seems to be no air separation engineer exam. If you take the examination of the personnel department, plus the evaluation, you need many conditions. You can evaluate engineers slowly if you have the conditions. You can also choose to test the qualifications of technicians. There are many appraisal units specializing in air separation operation technicians. It is ok to evaluate a technician. Although it is not too difficult, at least it proves that it has a foundation and a considerable level of operation.