Method of manufacturing steel fuel-conveying pipe
AssigneeUsui Co., Ltd.
InventorTaketo IKENOYA
Life of this patent
Estimating the term…
Abstract
Provided is a method of manufacturing a high-quality steel fuel-conveying pipe that is highly resistant to corrosive fuel. The method is characterized by including screening and classifying a steel pipe material as one having an initial flaw (such as a fine crack, wrinkle flaw, or weld defect part) exceeding a preset threshold or one having the initial flaw not exceeding the preset threshold on the inner peripheral surface of the pipe material, removing the initial flaw on the inner peripheral surface of the pipe material having the initial flaw not exceeding the threshold by mechanical cutting, and subjecting the inner peripheral surface of the pipe material to a surface treatment such as Ni plating.
Claims4
A method of manufacturing a steel fuel-conveying pipe having an anti-rust film layer on an inner peripheral surface of a steel pipe material, the method comprising:
- screening and classifying the pipe material as one having an initial flaw exceeding a preset threshold or one having the initial flaw not exceeding the preset threshold,
- removing the initial flaw on the inner peripheral surface of the pipe material having the initial flaw not exceeding the threshold by mechanical cutting, and
- subjecting the inner peripheral surface of the pipe material to a surface treatment.
A method of manufacturing a steel fuel-conveying pipe having an anti-rust film layer on an inner peripheral surface of a steel pipe material, the method comprising:
- performing flaw detection on the inner peripheral surface of the pipe material to detect an initial flaw,
- screening and classifying the pipe material as one having a detected value exceeding a preset threshold or one having the detected value not exceeding the preset threshold,
- removing the initial flaw on the inner peripheral surface of the pipe material having the detected value not exceeding the threshold by mechanical cutting, and
- subjecting the inner peripheral surface of the pipe material to a surface treatment.
Dependencies are inferred from the claim text.