I suspect you could set up a briar pipe to be the knocker that dangles and hits the metal chimes, but I highly doubt the pitch of briar pipes as the chimes would work at all.
I think it's a great idea! A unique visual atheistic. And, I think the sound of pipe bowls knocking together will be more soothing than chimes --- which I find somewhat annoying, especially on windy days.
I think IronMokey nailed it. Pipes wont make any real noise by themselves. They could be cool as he suggested...something to bump into the metal or bamboo chimes. I think with bamboo it could be cool. They will have to be placed quite close to the material that makes noise becuase they are a bit heavy to move much in the breeze.