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US 2021/0310756 A1Published application
Device for Cleaning Inner Surface of Heat Exchanger Tubes
AssigneeTubemaster, Inc.
InventorsClifford L Johns, Dennis Patrick McAndrews, Stephen W Brewer
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Abstract
A grit blasting arrangement for cleaning chemical reactor tubes includes means for ensuring the grit blast nozzle is coaxial with the longitudinal axis of the tube to be cleaned.
Claims7
A grit blasting device for cleaning tubes mounted perpendicular to top and bottom tubesheets, comprising:
- a positioning frame;
- a grit blast nozzle mounted on said positioning frame and projecting outwardly from said positioning frame, said grit blast nozzle defining a longitudinal axis;
- a plurality of stop pins mounted on said positioning frame and projecting outwardly from said positioning frame, said stop pins having distal ends which define an imaginary plane;
- wherein the grit blast nozzle is mounted on said positioning frame such that the longitudinal axis of said grit blast nozzle is defined relative to the imaginary plane defined by the distal ends of said stop pins.
1 more element
Dependencies are inferred from the claim text.