Heat transfer equipment often loses heat transfer capacity due to fouling and scaling which results in lost economic value in the form of lost heat, production, and the labor required for cleaning the equipment. A heat exchanger is provided, including: a first means of fluid communication to a shell (5); a second means of fluid communication to the shell; a flow diverter (2) for reversing the flow of fluid from the shell and the first and second means of communication; a tube (6) within the shell in fluid communication with both the first and second means of fluid communication; and a brush positionable within first and second brush housings (3), the brush housings positioned respectively on the first and second means of fluid communication, the brush moveable with the flow of fluid through the tube; wherein the tube is expandable independent of the shell. The tube is fixed to only one end of the shell without using tubesheets.

A system for cleaning and/or inspecting a pipeline includes a hose and a working device connected to one end of the hose. The working device includes a sensor device for detecting sensor data representing a movement direction of the working device in the pipeline, a hose drum for winding and unwinding the hose, a motor coupled to the hose drum and configured to rotate the hose drum so as to wind the hose onto the hose drum, and a control device connected to the working device and motor and to determine the movement direction of the working device in the pipeline on the basis of the sensor data and to output to the motor a first control signal which causes the motor to rotate and wind up the hose when the determined movement direction of the working device corresponds to a predetermined first movement direction.

A system for cleaning and/or inspecting a pipeline includes a hose and a working device connected to one end of the hose. The working device includes a sensor device for detecting sensor data representing a movement direction of the working device in the pipeline, a hose drum for winding and unwinding the hose, a motor coupled to the hose drum and configured to rotate the hose drum so as to wind the hose onto the hose drum, and a control device connected to the working device and motor and to determine the movement direction of the working device in the pipeline on the basis of the sensor data and to output to the motor a first control signal which causes the motor to rotate and wind up the hose when the determined movement direction of the working device corresponds to a predetermined first movement direction.