Tankerman · Safety — Bonding vs Insulating Flange
To control static and stray current at the ship/shore hose connection, the recommended arrangement is:
- AWelding the flanges together
- BA bare steel jumper only
- CNo electrical consideration at all
- DAn insulating flange (or a single length of non-conductive hose) in the connection, rather than a bonding cable across it✓ Correct
Explanation
Modern guidance favors electrically isolating ship from shore with an insulating flange or a non-conductive hose section to interrupt stray/galvanic currents, rather than a ship/shore bonding cable (which can itself arc when connecting/disconnecting in a flammable atmosphere). Tank internal bonding still applies to gauging/sampling equipment.
Authority: ISGOTT; static and stray-current control
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