How to evaluate the safety of glass lined vertical storage tanks?

With the rapid development of the chemical industry, glass lined vertical storage tanks, as important storage equipment, have increasingly attracted attention to their safety issues in the industry. Evaluating its security is a comprehensive process that involves multiple aspects of inspection and testing. The following is a detailed evaluation procedure:

1. On site safety assessment

Before conducting any assessment, it is important to ensure the safety of the site and avoid any safety accidents during the assessment process. Evaluators should inspect the surrounding environment of the leaking glass lined vertical storage tank to determine if isolation or cleaning is necessary to ensure the smooth progress of the assessment work.

2. Data collection

Collect design data, manufacturing data, usage and maintenance records of glass lined vertical storage tanks. These materials help to understand the basic information of the storage tank, such as the medium, operating conditions, historical leakage situation, etc., thus providing basic data for subsequent evaluation work.

3. Appearance inspection

Carefully inspect the exterior of the glass lined vertical storage tank to see if there are any obvious defects such as damage, deformation, cracks, etc. At the same time, record the specific location of the leak, such as dripping, spraying, etc., for subsequent analysis of the cause of the leak.

4. Internal inspection

If conditions permit, the interior of the glass lined vertical storage tank should be inspected. Use industrial endoscopes or other testing equipment to inspect the internal enamel layer for defects such as detachment, cracks, holes, etc. These internal defects are often one of the main causes of leaks.

5. Leakage testing

Conduct methods such as vacuum box testing, pressure testing, or dye penetration testing to determine the specific location and extent of leaks. Mark the leakage points and record the test data. These test data help assess the severity of the leak and provide a basis for subsequent processing work.

6. Cause analysis

Analyze the cause of the leak based on the collected data and test results. Possible reasons include material defects, manufacturing defects, operational errors, medium corrosion, temperature changes, external force damage, etc. An accurate analysis of the cause of the leak can help develop effective measures to prevent similar accidents from happening again.

7. Chemical and Physical Safety Assessment

In addition to the assessment of leakage mentioned above, chemical and physical safety assessments should also be conducted to ensure the overall safety of the glass lined vertical storage tank during use.
Chemical safety assessment: mainly focuses on the possible migration of heavy metals in the enamel layer. Soak glass lined products in simulated acidic food solutions using the soaking method, and detect the heavy metal content in the solution to evaluate their chemical safety. At the same time, it is necessary to detect the possible organic volatile compounds in enamel products to ensure that the products do not pose a risk to human health during use.

Physical safety assessment: mainly evaluates the thermal shock resistance and wear resistance of glass lined vertical storage tanks. Evaluate whether its physical properties meet safety standards by simulating stability tests under rapid temperature changes and wear resistance tests under certain wear forces.

8. Write an evaluation report

Compile the results of the aforementioned inspections, tests, and analyses into an evaluation report. The report should include information on the leakage situation, cause analysis, treatment recommendations, and results of chemical and physical safety assessments. The evaluation report should reflect the safety status of the glass lined vertical storage tank in detail, accurately, and objectively, providing scientific basis for subsequent handling work.
In summary, evaluating the safety of glass lined vertical storage tanks requires comprehensive consideration of multiple aspects, including on-site safety assessment, data collection, visual inspection, internal inspection, leakage testing, cause analysis, and chemical and physical safety assessment. By strictly implementing these steps, the safety and reliability of glass lined vertical storage tanks can be ensured during use.