Cargo tank inspections/tests

Scope

The type of test/inspection required and how often it must be performed depends on the type of cargo tank and what is being transported in it.

Regulatory citations

• None

Key definitions

• None

Summary of requirements

The requirements for the qualification and maintenance of cargo tanks can be found in Part 180, Subpart E of the Hazardous Materials Regulations. Section 180.407 outlines the requirements for tests/inspections, including the type of test and the interval of time for retesting.

Markings. After a cargo tank has successfully completed a test/inspection it must be marked as specified in 180.415. The tank must be marked with the date (month and year) and the type of test/inspection successfully completed. The test/inspection can be marked on the tank with the following abbreviations:

• V = external visual inspection and test
• I = internal visual inspection
• P = pressure test
• L = lining inspection
• T = thickness test
• K = leakage test
• K-EPA27 = leakage method 27 test

The test/inspection markings must be in English, at least 1.25 inches high, and placed near the specification plate or anywhere on the front head of the tank. The date must be readily identifiable with the applicable test/inspection.

Records. A written report must be created for each test/inspection. The contents of the report will vary depending on the type of tank and test/inspection completed. A copy of the test/inspection report must be retained until the next test/inspection is successfully completed. The reporting and record retention requirements for cargo tank tests/inspections can be found in 180.417.

Other requirements. Some cargo tanks carrying specific hazardous materials have additional test/inspection requirements. This includes cargo tanks in liquefied compressed gas service as specified in 173.315(n) and 180.416, and in chlorine service as specified in 173.315(o).