EQUIPMENT LINE FOR MANUFACTURING SEAMLESS STEEL TUBE OR PIPE AND METHOD OF MANUFACTURING HIGH-STRENGTH STAINLESS STEEL SEAMLESS TUBE OR PIPE FOR OIL WELLS USING THE EQUIPMENT LINE

摘要

An equipment line for manufacturing a seamless steel tube includes a steel heating device, a piercing device that pierces the steel into a hollow steel tube, a rolling mill that forms the hollow steel tube into a seamless steel tube having a predetermined shape, and a cooling system arranged between the heating device and the piercing device or between the piercing device and the rolling mill.