DOMESTIC TUBE MAKERS NEED TO SELECT STRETCH REDUCING MILL PROCESS AND EQUIPMENT APPROPRIATELY

Based on the fact that some local tube makers are using stretch-reducing process and equipment inappropriately,the author points out that correct selection of stretch-reducing process technology has to be made and that none of the welded tubes stretch-reduced can be considered as seamless steel tube. Stringent criteria has been set up for all the aspects of the stretchreducing mill equipment from design to manufacture. Inappropriate equipment selection would hardly meet tube reducing purpose to turn out qualified products.