Laying pipe

Abstract

A laying pipe ( 1 ) for a laying head for winding rounded rods comprises a first external pipe ( 5 ) with a first rectilinear section ( 2 ) and a second spiral section ( 3 ). A second internal pipe ( 10 ) in a single piece, with external diameter equal to the internal diameter of the first pipe ( 5 ) is inserted inside it in the first section ( 2 ). The laying pipe also has a sleeve ( 6 ) fixed at the rod entry end ( 4 ) which has the entry edges with fillet or a chamfer.

1 . A laying pipe for rolled products comprising 
 an external pipe having a first substantially rectilinear portion, a second substantially spiral shaped portion and a third substantially circular portion; and    an internal pipe inserted inside the external pipe, the internal pipe having an external diameter substantially equal to the internal diameter of the external pipe and a length slightly longer than the length (L) of the first rectilinear portion of the external pipe, whereby the internal pipe ends slightly downstream of a first bend which joins the first rectilinear portion to the second spiral shaped portion;    wherein the internal pipe is a continuous single piece and is fixed by welding to the external pipe at the rolled products entry end.    
   
   
       2 . (canceled)  
   
   
       3 . The pipe according to  claim 1 , wherein said first portion comprises a first bending connection to said second portion.  
   
   
       4 . (canceled)  
   
   
       5 . (canceled)  
   
   
       6 . The pipe according to  claim 1 , having a sleeve with a fillet or chamfered edge fixed at the rolling product entry end.  
   
   
       7 . The pipe according to  claim 1 , wherein the length of said first portion is shorter than 1.5 m.  
   
   
       8 . The pipe according to  claim 1 , wherein said third portion has the length of a circumference with central angle smaller than 100°.