ISO 19349:2019 pdf download – Plain bearings with liquid lubrication — Lubricant supply arrangements and monitoring. 4.2.2 Oil feed and oil return To minimize the possibility of vibrations or thermally induced tensile or compressive stresses occurring in the bearing housing, flexible compensators or connections shall be provided in the oil supply and drain piping systems if applicable. For electrically insulated plain bearings, it is necessary to consider whether oil supply and drain pipes connected to the bearing also need insulating to prevent short circuit of the bearing insulation. To restrict the pressure losses in the piping system to an economically...