piped

Shaped like a pipe; tubular.

Adjective

Shaped like a pipe; tubular.
Conveyed by a pipe.
- All other piped services for the locomotives are provided in the shed; two types of lubricating oil, a waste-oil pipeline, compressed air, radiator-coolant water and both hard- and soft-water pipelines. - 1960 December,...
Of a rail vehicle, having a through brake pipe, without the vehicle having brakes operating from it.
- Vacuum-fitted wagons are provided with complete vacuum-brake equipment; "piped" wagons have through pipes, enabling them to be marshalled in vacuum-braked trains without interrupting the continuity of the vacuum brake...