Title:
INNER GROOVED PIPE FOR FLARE PROCESSING AND HEAT EXCHANGER PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2024/004489
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an inner grooved pipe for flare processing in which cracking due to tube expansion from flare processing is unlikely to occur. The problem is solved by an inner grooved pipe for flare processing, which is a seamless pipe, that has grooves in the inner surface thereof, and flare processing applied to an end thereof, wherein: the outer diameter D is 2.0-5.5 mm; the ratio T/D between the wall thickness T and the outer diameter D is 0.057-0.005 D to 0.075-0.005 D; the twist angle θ of the inner groove is 15-27 degrees; the tip radius of curvature r of fins constituting the inner grooves and the number N of the fins in the circumferential direction satisfy a specific formula; and the tip radius of curvature r and the twist angle θ satisfy a specific formula.
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Inventors:
UENO YASUHIRO (JP)
HOSOGI TETSURO (JP)
HOSOGI TETSURO (JP)
Application Number:
PCT/JP2023/020057
Publication Date:
January 04, 2024
Filing Date:
May 30, 2023
Export Citation:
Assignee:
KMCT CORP (JP)
International Classes:
F28F1/40; B21D53/06; C22F1/00
Foreign References:
| JP2017020063A | 2017-01-26 | |||
| JP2009243722A | 2009-10-22 |
Attorney, Agent or Firm:
MIGITA, Shunsuke et al. (JP)
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