Method for producing a steel tube including cleaning of the inner tube wall
AssigneeSandvik Materials Technology Deutschland GmbH
InventorsThomas Frobose, Udo Rauffmann
Life of this patent
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Abstract
A method for producing a steel tube including the step of the manufacturing a steel tube having an inner tube wall, an outer tube wall, and a free tube cross-section enclosed by the inner tube wall, wherein after the manufacturing, the steel tube includes at least one contaminant on the inner tube wall. After the manufacturing of the steel tube, the inner tube wall is cleaned by introducing liquid or solid CO2 into the free tube cross-section, and of applying the liquid or solid CO2 onto the inner tube wall to remove the contaminant therefrom.
Claims14
A method for producing a steel tube comprising the steps of:
- manufacturing said steel tube having an inner tube wall, an outer tube wall, and a free tube cross-section enclosed by the inner tube wall, wherein after the manufacturing, the steel tube includes at least one contaminant on the inner tube wall;
- cleaning the inner tube wall by introducing liquid or solid CO2 into the free tube crosssection and applying the liquid or solid CO2 onto the inner tube wall to remove the at least one contaminant from the inner tube wall, wherein the liquid or solid CO2 is introduced from a first end of the steel tube into the free tube cross section,
- measuring the temperature of the steel tube during the application of the liquid or solid CO2 onto the inner tube wall, and
- interrupting cleaning if the temperature of the steel tube falls below a predetermined temperature threshold.
Dependencies are inferred from the claim text.