I think the point is the OP would be using standard American 240v for a 6-15r or 6-20r (totally NEC compliant) and the euro appliance would not know the difference.
We see that with PC equipment all the time. It is pretty common to get a Euro power cord in the box along with the US 6-15 cord when you buy a piece of 2xx volt capable hardware.
I understand some of these kettles have detachable cords with an IEC C15 plug. (Similar to the PC C13 plug but with a notch in it indicating it is rated high temperature)
If you could find a cord with a NEMA 6-15 cap and a C15 on the other end you would be perfectly compliant.
