1. Learn relevant knowledge: attend and pass relevant training courses to learn theoretical knowledge and practical operation skills of oil fume pipeline cleaning.
2. Preparation materials: according to local requirements, prepare application materials, including personal identity certificate, health certificate, training certificate, etc. In addition, you need to provide relevant work experience certificates or relevant industry experience.
3. Submit application: submit the prepared application materials to relevant departments or institutions, such as local construction and health authorities, or associations and trade unions in related industries.
4. Examination or evaluation: According to local requirements, it may be necessary to take an examination or accept an evaluation. The contents of these examinations or assessments may include theoretical knowledge examinations, practical operation ability examinations, etc.
5. Payment of fees: According to local regulations, it may be necessary to pay certain fees, including application fees and examination fees.
6. Examination and certification: relevant departments or institutions shall examine the application materials, and if they meet the requirements, they shall issue corresponding qualification certificates for cleaning oil fume pipelines.
It should be noted that the specific procedures and requirements may vary from region to region. It is recommended that you consult the relevant local departments or institutions before the specific operation to ensure that the qualification certificate for cleaning fume pipes is handled accurately.
Please note that the information I provide is for reference only, please take the actual situation as the standard.