一、前言目前,用无缝管生产方法和焊管生产方法生产的钢管,品种、规格和钢种繁多,用途广泛,所以,本文不可能全面阐述现代钢管制造技术的全部研究成果。无缝钢管的生产经历了好长的时间了,其研究工作已进行了许多年。可是, I. Preface At present, the seamless steel pipe production methods and production methods of steel pipe production, variety, size and variety of steel, a wide range of uses, therefore, this paper can not fully explain all the modern steel pipe manufacturing technology research results. Seamless steel pipe production has gone through a long time, and its research work has been carried out for many years. but,