What must a fuel tank be declared as before welding is permitted?

Before welding can be permitted on a fuel tank, it must be declared as "safe for hot work." This declaration is crucial because welding involves high temperatures that could ignite flammable vapors or residues. To ensure the safety of the personnel performing the welding and to prevent potential explosions or fires, a thorough assessment must be conducted. This often includes checking for hazardous vapors, ensuring proper ventilation, and confirming that any flammable materials have been removed or properly managed.

This process typically includes issuing a hot work permit, which serves as a formal acknowledgment that the environment has been sufficiently evaluated and deemed safe for such activities. Only once a fuel tank has been confirmed safe for hot work can welding operations commence, as this indicates that all necessary safety precautions have been put in place to mitigate risks associated with the operation.