Railway vehicle with a working media supply

The rail vehicle has a working fluid operated device (1) and an associated piping (2), where the piping is provided with semi-flexible plastic tubes (2.1,2.1'), a pipe connecting unit (2.2) and pipe fasteners (2.3). The tube is made of metal layer, particularly aluminum layer or stainless steel layer, where the tube is provided with a polyethylene layer, particularly high-density polyethylene.