Method and apparatus for expanding spiralweld pipe

Details Method and apparatus for expanding spiralweld pipe Method and apparatus for expanding spiralweld pipe

B - Operations, Transporting

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D

113/58

B21D 47/00 (2006.01) B21C 37/30 (2006.01) B21D 31/04 (2006.01) B21D 39/20 (2006.01) C21D 7/12 (2006.01)

Patent

CA 1148796

METHOD AND APPARATUS FOR EXPANDING SPIRALWELD PIPE ABSTRACT OF THE DISCLOSURE This invention provides a method and apparatus for expanding spiralweld pipe. The expander head is cantilevered at a fixed location and the spiralweld pipe is advanced in stages around the expander head, moving in the direction of the pipe axis. At each stage, the pipe is stopped, and the expander head is expanded to cause expansion in the pipe. The expander head has on its surface a helically arranged recess matching the main weld of the pipe. As the pipe is moved between adjacent expansion locations, it undergoes axial and rotational motion so that the main weld tracks in registry with the recess.

251515

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