Title:
A LARGE-DIAMETER METAL-LINED SPIRAL WELDED STEEL PIPE AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2016/101298
Kind Code:
A1
Abstract:
Disclosed is a large-diameter metal-lined spiral welded steel pipe, comprising a pipe (101) formed by spirally winding a main steel sheet (100); an inner wall of the pipe is provided with a first liner (200) and a second liner (300), the first liner is spirally fitted to a surface of the main steel sheet, the width of the first liner being less than the width of the main steel sheet, and the second liner is spirally fitted to a spiral seam (102) formed between adjacent pipes, the left and right sides of the second liner being respectively welded to the first liners adjacent thereto, and the first liner and the second liner covering the inner wall of the whole pipe; a reinforcing ring (400) having a semi-closed shape in a cross-section thereof is spirally disposed along the external wall of the pipe, and a spiral path is formed between the inner wall of the reinforcing ring and the external wall of the pipe. Also disclosed are a manufacturing method of the large-diameter metal-lined spiral welded steel pipe. The metal lining disposed in the inner wall of the steel pipe can improve corrosion resistance and abrasion resistance of the pipe and avoid fluid contamination; the reinforcing ring disposed on the external wall of the steel pipe can improve a moment of inertia of a circular cross section of the pipe wall, and the wall thickness of the main sheet is thinner than a common steel pipe wall and can therefore reduce costs.
Inventors:
ZHAN FUJUN (CN)
Application Number:
PCT/CN2014/095449
Publication Date:
June 30, 2016
Filing Date:
December 30, 2014
Export Citation:
Assignee:
NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOLOGY CO LTD (CN)
International Classes:
F16L9/04; F16L9/153; F16L9/16; F16L58/00
Foreign References:
| CN204420341U | 2015-06-24 | |||
| CN101675285A | 2010-03-17 | |||
| CN203892733U | 2014-10-22 | |||
| CN202302347U | 2012-07-04 | |||
| CN201028144Y | 2008-02-27 |
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM(ORDINARY PARTNERSHIP) (CN)
南京苏高专利商标事务所(普通合伙） (CN)
南京苏高专利商标事务所(普通合伙） (CN)
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