We don't have synonyms for brake pipe yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are brake line and broken pipe.
(n) :
Alternative form of brakepipe. [(rail transport, mechanical engineering) A continuous pipe or hose filled with high-pressure air and running the length of a train, used to recharge the train's brake reservoirs with compressed air and to control the train's air brakes through changes in its internal air pressure.]
(n) :
Alternative form of brakepipe. [(rail transport, mechanical engineering) A continuous pipe or hose filled with high-pressure air and running the length of a train, used to recharge the train's brake reservoirs with compressed air and to control the train's air brakes through changes in its internal air pressure.]