Title:
金属管の製造方法、ダイス及び金属管
Document Type and Number:
Japanese Patent JP6812881
Kind Code:
B2
Abstract:
To provide a method of manufacturing a metallic pipe for groundwater drainage work, which can be easily coupled and which can discharge groundwater, a die for use in the same, and the metallic pipe for the groundwater drainage work, which is manufactured by them.SOLUTION: A metallic pipe 1 for groundwater drainage work comprises a body part 6, one pipe end 7, and a tapered part 8 for connecting the body part 6 and the pipe end 7 together. An outer peripheral surface 4 of a convex part 11 of the pipe end 7 is positioned on the inside with respect to an inner peripheral surface 5 of a convex part 10 of the body part 6, in a view in a direction of the central axis C. An outer peripheral surface 4 of a concave part 14 of the pipe end 7 is positioned on the inside with respect to an inner peripheral surface 5 of a concave part 13 of the body part 6, in the view in the direction of the central axis C.SELECTED DRAWING: Figure 1
Inventors:
Goki Shimomoto
Application Number:
JP2017066109A
Publication Date:
January 13, 2021
Filing Date:
March 29, 2017
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21C37/15; B21C3/02; B21C37/18; E02D17/20; F16L9/02
Domestic Patent References:
| JP10156419A |
Attorney, Agent or Firm:
Ascend Patent Business Corporation