Method for manufacturing a steel pipe including cleaning of the inner wall of the pipe

摘要

The present invention relates to a method for manufacturing a steel pipe (1), comprising the manufacture of a steel pipe (1) having a pipe inner wall (2), a pipe outer wall and a free pipe cross section (5) surrounded by the pipe inner wall (2). A method for manufacturing a steel pipe (1) comprising: after manufacture, the steel pipe (1) contains at least one contaminant on the inner wall of the pipe, and the manufacturing of the steel pipe involves cleaning the inner wall of the steel pipe About. According to the invention, liquid or solid CO2 is introduced into the free pipe cross section (5) and liquid or solid CO2 is applied on the pipe inner wall (2) in order to remove contaminants from the pipe inner wall (2). This process results in cleaning of the tube inner wall (2). [Selection] Figure 2