Depending on the flow you want it may be possible to use gregtech pipes to force the right amount (checked, there isnt any GT pipe with 32000mb/s). You will need one output hatch per pipeline and then you use a GT pipe that has a maximum capacity that is the nominal flowrate of the turbine. There are a few things you can controle flows but typically not at such high flowrates as you are looking at right now. i think 4 flowcontrollers (max 20000mb/s per controller) would solve your problems though. If you have a decent amount of tungstensteel i would recommend the 48000 mb/s turbine, it works really well. Thats the solition i used for my oversized lava setup. It consumes 1800 mb of lava per second to produce about 14400 eu/t in a superheated steam system. SInce im using large fluxed electrum pipes i can controle the flowrate into the turbines with the huge tungstensteel pipes
@Joel Falk this was from quite a while back but I just discovered a nifty item from GT: fluid regulators as covers, available in all voltage tiers and configurable with a screwdriver.