What must be done to containers involved in a fire before they can be reused?

When containers, such as propane tanks, are involved in a fire, they have likely been exposed to extreme heat and potential damage that may compromise their integrity. Before these containers can be reused, they must undergo a requalification process. This process involves thorough inspections, testing, and possibly repairs to ensure that the containers meet safety standards and are safe for continued use.

Requalifying containers ensures that they can still safely contain gas under pressure and that they have not sustained unseen damage that could lead to failures or accidents during operation. It is a critical step in maintaining safety and compliance with regulations governing the use of pressurized containers, particularly in industries dealing with hazardous materials like propane.