Methods and systems for cleaning inner surfaces of tubes in a heat exchanger. Some systems include a cleaning device having a nozzle configured to inject cleaning fluid into first and second tubes to perform different first and second cleaning cycles on the tubes, respectively, a controller configured to determine delivery parameters for the cleaning cycles based on a characteristic of each tube, and to control the cleaning device to perform the cleaning cycles based on the delivery parameters. Some methods include determining, with a controller, a tube in the heat exchanger engaged with a nozzle of a cleaning device for injecting a cleaning fluid into the tube during a cleaning cycle, a characteristic of the tube, and a delivery parameter of the cleaning cycle for the tube based on the characteristic of the tube; and performing the cleaning cycle for the tube based on the delivery parameter.

Disclosed are cleaning devices and methods of use thereof for cleaning a vertical stack plumbing system. The cleaning device includes a first cylindrical body defining a first opening for selectively introducing a predetermined amount of cleaning medium into the cleaning device; a second cylindrical body defining a second opening configured to maintain airflow and venting of the vertical stack plumbing system when the cleaning device is in use, the first and second cylindrical bodies being directly connected to a main body of the cleaning device and in fluid communication with one another through the main body; and an attachment member defining a third opening that is directly connected to the main body of the cleaning device, the attachment member configured for direct removable attachment to a plumbing waste pipe in the vertical stack plumbing system and for receiving the cleaning medium therethrough to introduce the cleaning medium into the vertical stack plumbing system.

A nozzle ejecting liquid and nozzle device ejecting a liquid upon mixing an abrasive into a liquid jet stream, obtains a converged jet stream. A nozzle includes: a main body; a buffer chamber in the body, whose central axis is an axis line being the liquid jet stream central line; a constrictor part ejecting the liquid, in a buffer chamber plane on a buffer chamber front side and whose central axis is the axis line; a disk plate inside the buffer chamber, facing the plane on the buffer chamber front side and whose central axis is the axis line; a supporting member supporting the disk plate within the buffer chamber; a supply opening in the body supplying the liquid; and an inflow channel along a direction different from the axis line extending direction, opened on a disk plate rear side and the buffer chamber and communicating with the opening.

Aspects of the present disclosure are presented for techniques in removing roughness and surface anomalies in structures with internal passages and intricate external surfaces, such as structures with internal fluid passages constructed by additive manufacturing (AM), using an abrasive slurry. Post processing methods which are capable of smoothing non-uniform surface roughness within intricate fluid passages are a prerequisite to the widespread adoption of AM for complex fluid systems. In some embodiments, a mixture of abrasive powder and deionized (DI) water is used to create a viscous slurry which can then be pumped through the internal fluid passages of a workpiece until the desired surface roughness is achieved. This abrasive flow machine (AFM) is capable of smoothing a wide range of roughnesses, internal geometries, and printable materials.

Methods for post-mold processing a Venturi device for generating vacuum are disclosed that improve the evacuation time thereof. The methods include providing a molded Venturi device having a body defining a Venturi gap between an outlet end of a converging motive passageway and an inlet end of a diverging discharge passageway, where the outlet end defines a motive exit having flash extending radially inward and the inlet end defines a discharge inlet having flash extending radially inward. Then, the method includes positioning the molded Venturi device with an inlet end of the converging motive passageway facing a blasting nozzle or with an outlet end of a diverging discharge passageway facing a blasting nozzle, and propelling blasting media into the motive inlet or the discharge exit of the Venturi device to remove the flash in the motive exit and in the discharge inlet, or vice versa.

A part comprising a one or more removable wear indicators is provided. The part may be a stator segment comprising a plurality of airfoils. The stator segment may also comprise one or more mock airfoils at each end of the stator segment. Each of the mock airfoils may comprise an indicator configured to wear during a polishing process.

A system and method for cleaning of heat exchanger tubes including an assembly, an indexer, and a communication device provided with specialized software and programming. The indexer includes orthogonally arranged first and second arms. A trolley and sensors are provided on the indexer arms. One or more lances are provided on the trolley to deliver water jets into the openings. Sensors measure displacement as the trolley is moved relative to the heat exchanger's face plate. An operator controls the system from a distance away using the communication device. During setup, the pattern of the face plate is learned and mapped utilizing information from the sensors as one of the inputs. This information is utilized to help navigate the face plate during a subsequent cleaning operation. A kit for retrofitting existing X-Y indexers is also disclosed.

A device, system, and method is disclosed for cleaning the interior of the tubes in air-cooled heat exchangers. The tubes are cleaned using dry finely divided abrasive entrained in high pressure air blasted through the tube to remove any accumulation in the tube or on the tube walls resulting in a bright metal condition suitable for inspection by the Internal Rotary Inspection System, or application of a corrosion-resistant coating, or a lesser level of cleanliness appropriate for return to service. The device is electromagnetically attached to the outside of a ferromagnetic tube header, or to a ferromagnetic plate secured to the outside of a non-ferromagnetic plug-type header or a plate-type header of any material, to temporarily secure a grit-resistant nozzle assembly and position the nozzle for proper application of the high pressure air and entrained abrasive to facilitate cleaning, avoid tube damage, and provide for operator safety. The disclosure still further relates to a system and a method, both employing the device, to clean the interior of the tubes with dry abrasive blasting using high pressure air, and at the other end of the tube, capturing the air, spent abrasive, and material removed from the tube, separating the spent abrasive and removed material from the waste air, filtering the waste air, and exhausting the now filtered air to the environment; all without fugitive emissions.

One exemplary embodiment of this disclosure relates to a method of forming an engine component. The method includes forming an engine component having an internal passageway, the internal passageway formed with an initial dimension. The method further includes establishing a flow of machining fluid within the internal passageway, the machining fluid changing the initial dimension.

A method for cleaning a jet engine includes introducing a cleaning medium having solid materials into the engine by way of at least one discharging device, wherein the cleaning medium exits from the discharging device at an exit speed of 80 m/s or less.