If the container previously held flammable material, which of the following statements is true regarding the safety approach?

If the container previously held flammable material, which of the following statements is true regarding the safety approach?

• A. An experienced welder should do the work
• B. The container should be filled with an inert gas and vented
• C. A qualified safety inspector should be consulted or be present
• D. All of the above

Answer: (D)

When working on a container that previously held flammable material, you must address all the risk pathways: residual vapors, ignition sources, and proper oversight. Purging with an inert gas helps displace flammable vapors, reducing the chance of ignition, while venting ensures any remaining vapors and pressure can be released safely. Having a qualified safety inspector present or consulted provides an expert risk assessment, ensures the work is covered by the proper permit-to-work, and verifies that all preventive controls (isolation, grounding, atmosphere monitoring) are in place. An experienced welder brings the necessary skill to perform the hot work safely within that plan. Taken together, these steps create a comprehensive safety approach, so the best choice is the one that includes all of them.

When working on a container that previously held flammable material, you must address all the risk pathways: residual vapors, ignition sources, and proper oversight. Purging with an inert gas helps displace flammable vapors, reducing the chance of ignition, while venting ensures any remaining vapors and pressure can be released safely. Having a qualified safety inspector present or consulted provides an expert risk assessment, ensures the work is covered by the proper permit-to-work, and verifies that all preventive controls (isolation, grounding, atmosphere monitoring) are in place. An experienced welder brings the necessary skill to perform the hot work safely within that plan. Taken together, these steps create a comprehensive safety approach, so the best choice is the one that includes all of them.