To provide a metallic tubular member of small-diameter and having a smooth inner surface and a method for manufacturing the same.
There is provided a method for manufacturing a metallic tubular member characterized in that a maximum height difference (Rf) at a surface roughness of an inner surface is less than 3 μm and its inner diameter is less than 1.0 mm and a metallic thin plate 4 having the tubular member developed in its shape is press worked to make a tubular member. Accordingly, irrespective of a small diameter of a metallic tubular member, the inner surface of the tubular member is kept at a smooth state, a resistance is low when the fluid flows in the tubular member, and either a stain or a foreign material is hardly adhered to the member. Due to this fact, the tubular member is preferentially machined into a small-diameter tubular member such as a stinge needle, for example, and preferably used.
Okano, Masayuki
OKANO KOGYO KK
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