| 摘要 |
A curved element of double-wall, modular metal pipes for transporting concrete or other highly-abrasive fluid materials comprises an outer pipe element (1) having high mechanical strength and an inner pipe element (2) with high wear-resistance, consisting of a series of annular wedge elements (3), arranged side by side to form a substantially continuous lining of the outer pipe element. The outer diameter of said annular wedge elements is such as to couple with play with the outer pipe element. Outer radial spacing means (4) of the annular wedge elements form a gap chamber (C) between the outer pipe element and said annular wedge elements arranged side by side. Ports (5) are provided in said annular wedge elements for putting in communication the gap chamber with the inner part of the pipe. |
