note the tesseract has an input limit of 160mb/side. you need to connect the liquiduct to 5 sides, and each boiler will require its own 'send' tesseract due to this limitation.
a 'receive' tesseract can receive and ouput an unlimited amount of steam. the bridge steam consumer, however, can only accept 1 bucket/tick. if you were using a fancy 6 bridge starred configuration, a single tesseract could output 6buckets/tick to 6 consumers. most of the time this isnt practical, and the most you can/will get from a single tesseract is 2000 mb/t when hooked up to two bridges with 3 boiler tesseracts set to 'send' on the same channel.
my personal preference is to place 9 liquiducts on the boiler, then place a tesseract on the center of that square and surround it with more liquiduct on layer 2. this will export all the steam with 13 liquiducts.