Method for producing bimetallic line pipe

Details Method for producing bimetallic line pipe Method for producing bimetallic line pipe

2005-03-04

2009-10-06

Hong, John C (Department: 3726)

Metal working

Method of mechanical manufacture

Assembling or joining

C029S508000

Reexamination Certificate

active

07596848

ABSTRACT:
The present invention involves a system and method for producing bimetallic pipe. In one embodiment of the present invention, the method includes inserting an inner shell into an outer shell and reducing the outer shell to securely engage the inner shell by drawing the outer shell and inner shell through a die without the use of a mandrel placed in the inner shell. In another embodiment of the present invention, the method includes inserting an inner shell into an outer shell and reducing the outer shell to securely engage the inner shell by sizing the outer shell using at least one roller stand.

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Chinese Office Action Application No. 200510106723.0, 5 pages, Jan. 4, 2008.

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