The quality of the tube blank has an extremely important influence on the quality of the seamless steel tube. Any tube blank that does not meet the quality requirements must not be fed. The surface defects of the tube blank must be removed.
1. Tube blank quality inspection method:
a. Visual inspection: surface quality
b. Low magnification organization: sulphur printing, acid leaching, industrial hydrochloric acid or copper chloride solution check cracks, bubbles, loose, white spots, inclusions and other distribution.
2. Clearance of tube blank surface defects:
a. Flame cleaning:≤0.4%c Surface defects of tube blank.
b. Air shovel cleaning: suitable for the cleaning of local defects on the surface of tube blanks.
c. Wheel cleaning: mainly used for tube blanks that should not be used for flame cleaning.
d. Turning and cleaning: It is mainly used for the cleaning of surface defect of pipe blanks with high added value and quality requirements, such as stainless steel blanks, rust blanks: such as P91 and P92.
In short, the inspection and inspection of the quality of the tube blanks and the necessary cleaning of the surface defects of the tube blanks are the basic prerequisites for ensuring that the blanks used in the production of seamless steel tubes meet the quality requirements.
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