How should you verify that a transfer line is properly grounded before connecting hoses?

• A. Ignore grounding entirely; static electricity is not a concern during transfer.
• B. Wait until a spark is observed before grounding.
• C. Simply rely on the receiving vessel being grounded.
• D. Use a bonding/grounding strap; ensure grounding point is solid and compliant with SOP to discharge static electricity.

Answer: (D)

Static buildup on transfer lines can ignite flammable vapors, so you must establish a reliable bond to earth before connecting hoses. Use a bonding/grounding strap to connect the transfer line (or hoses) to a verified grounding point in the facility’s earth-ground system. Make sure the grounding point is solid metal, free of paint, corrosion, or non-conductive coatings, and that the setup follows your SOP. If required, test continuity to confirm a complete electrical path to earth. Do not proceed based on the receiving vessel alone or wait for a spark—the important step is confirming a continuous, compliant grounding path to discharge static electricity. Keep the bond intact and re-check after any movement or reconfiguration.