hey kitty.... as per the instructions on the website of qatar airways...

" As a Burgundy member you are entitled to an extra baggage allowance* of 10 kgs when travelling on Qatar Airways flights.

*Except on our USA service where no excess baggage allowance is provided. On these services, the piece concept applies with passengers entitled to two pieces of checked baggage, not exceeding 23kgs each."

hope this helps....
cheers