Title:
LARGE-DIAMETER THIN-WALLED SPIRAL WELDED PIPE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/060850
Kind Code:
A1
Abstract:
Disclosed are a large-diameter thin-walled spiral welded pipe and a manufacturing method therefor. The large-diameter thin-walled welded pipe is formed by spiral roll-welding of a double-layer composite steel strip that comprises a first steel strip layer (1) and a second steel strip layer (2), which have equal widths and are aligned, wherein the first steel strip layer (1) is a corrugated steel strip, the second steel strip layer (2) is a flat steel strip, and the first steel strip layer (1) is welded to the second steel strip layer (2) on both sides and at each trough of corrugation so as to form the double-layer composite steel strip. The corrugated steel pipe fully wraps around the internal flat-walled steel pipe, so that the entire structure can uniformly and cooperatively bear external loads.
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Inventors:
ZHAN FUJUN (CN)
Application Number:
PCT/CN2023/110720
Publication Date:
March 28, 2024
Filing Date:
August 02, 2023
Export Citation:
Assignee:
NANJING DADE STEEL PIPE CO LTD (CN)
International Classes:
F16L9/16; B23P15/00; B23K101/06
Foreign References:
| CN218761917U | 2023-03-28 | |||
| CN115560139A | 2023-01-03 | |||
| CN103557381A | 2014-02-05 | |||
| CN205173741U | 2016-04-20 | |||
| CN204868098U | 2015-12-16 | |||
| CN101907207A | 2010-12-08 | |||
| CN210566762U | 2020-05-19 | |||
| JPH06193774A | 1994-07-15 |
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM (ORDINARY PARTNERSHIP) (CN)
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