Discussion on Several Technological Issues Relating to Mandrel Pipe Mill

Up to now,the mandrel pipe mill has been used as the main type of pipe mills in domestic seamless steel tube-making circles. similarities and differences between mandrel pipe mill at home and abroad are analyzed,involving such issues as determination of type of the billet heating furnace,the combined and separate arrange-ments of the extracting/sizing process. It is proposed as a concept that a guide section be incorporated with the retained mandrel in a bid to reduce the operation costs. Also proposed are some ideas with respect to saving energies and improving product quality via such techniques as material hot-charging and hot-conveying,and controlling of cooling condition,etc. At last,it is emphasized that for billet heating for the mandrel pipe mill,the rotary hearth furnace should not be regarded as the only choice.