LARGE-APERTURE SPIRAL WELDED STEEL PIPE WITH METAL LININGS AND MANUFACTURING METHOD THEREOF

摘要

A large-aperture spiral welded steel pipe with metal linings and a manufacturing method thereof, wherein the pipe includes a pipe body spirally winded by a main steel belt; a first lining and a second lining are arranged on a body inner wall, the first lining is spirally laminated on the main steel belt surface, the first lining width is smaller than the main steel belt width, the second lining is spirally laminated on a spiral seam formed between adjacent pipe bodies, the second lining left and right sides are respectively welded with the adjacent first lining, and the first lining and the second lining cover the inner wall of the entire body; and a reinforcement ring with a semi-closed section is spirally arranged along a body outer wall, and a spiral passage is formed between the inner wall of the reinforcement ring and the body outer wall.

主权项

1. A large-aperture spiral welded steel pipe with metal linings, comprising a pipe body spirally winded by a main steel belt, wherein a first lining and a second lining are arranged on an inner wall of the pipe body, the first lining is spirally laminated on the surface of the main steel belt, the width of the first lining is smaller than the width of the main steel belt, the second lining is spirally laminated on a spiral seam formed between adjacent pipe bodies, left and right sides of the second lining are respectively welded with the adjacent first lining, and the first lining and the second lining cover the inner wall of the entire pipe body; and a reinforcement ring with a semi-closed section is spirally arranged along an outer wall of the pipe body, and a spiral passage is formed between the inner wall of the reinforcement ring and the outer wall of the pipe body.