3. The improvement and development period of the steel pipe industry

After the Third Plenary Session of the 11 th CPC Central Committee, China has extensively participated in international exchanges and introduced advanced technology. Starting from the introduction of Baosteel's φ140mm mandrel full floating continuous rolling mill, Tianjin φ250mm mandrel limited continuous rolling mill, Daye φ177mm Axel rolling mill, Chengdu φ180mm precision rolling mill and Hengyang φ89mm mandrel semi-restricted continuous rolling mill have been built successively. Baotou Steel's φ140mm automatic pipe rolling mill, which has been in operation for nearly 30 years, has also undergone international level technical transformation, and has also introduced a φ250mm stand (5 frames) mandrel limited continuous rolling mill. The commissioning of these rolling mills has made our country seamless
The level of steel pipe hot rolling equipment was raised to the international level at that time.
Since China's steel pipe industry entered the 21st century, after more than 20 years of rapid development, it has become the world's largest steel pipe producer and consumer. Since the financial crisis in 2008, the development of China's steel pipe industry has been outstanding, and the proportion of annual output in the world has been stable at about 70%. In 2013, the output of steel pipes reached 79.79 million tons, a year-on-year increase of 7.67%, of which the output of seamless steel pipes was 29.628 million tons, a year-on-year increase of 508%, and the output of welded pipes was 50.162 million tons, a year-on-year increase of 7.7%. In terms of exports, in 2013, the export of steel pipes was 9 million tons, a year-on-year increase of 161%, of which the export of seamless steel pipes was 5.12 million tons, a year-on-year decrease of 161%. In 2014, China's steel pipe consumption was 82 million tons, a year-on-year increase of 3%, including 32 million tons of seamless steel pipes and 50 million tons of welded pipes; The export of steel pipes was about 9.5 million tons, a year-on-year increase of 5%, including 5.2 million tons of seamless steel pipes and 4.3 million tons of welded pipes. According to the statistics of several authoritative institutions such as China Business Intelligence Network, the national steel pipe output was 53.171 million tons in 2017, 48.3724 million tons in 2018, and 56.192 million tons in 2019. In recent years, real estate, machinery, oil and gas, and foreign trade are the most important consumer markets for steel pipes, accounting for more than 50% of total consumption.