INVESTIGATION OF PROPORTION TAKEN BY DOMESTIC LARGE-SIZED SEAMLESS STEEL PIPE MILLS

The paper deals with such issues as the general situations of large-sized seamless steel tube production both in China and worldwide industrialized countries, total steel tube production capacity of each country involved, its capacity of large-sized seamless steel tubes as well as the proportion the large-sized tube capacity acounts for to the total capacity of each country, Also predicted in the paper is the developing trend of large-sized seamless steel tuber-making technologies.