Method for manufacturing seamless pipe

摘要

A method for manufacturing a seamless pipe, comprises: preparing a billet made of an alloy steel or an alloy; joining a steel plate to an end surface at which piercing of the billet is commenced; preparing a piercing plug made of Mo, a Mo alloy or a heat-resisting steel; hot-piercing the billet by using the piercing plug to produce a hollow shell; and rolling the hollow shell to produce a seamless pipe.