70 years: from scratch, into the world's largest steel pipe

Since the founding of new China 70 years ago, China's steel pipe industry has made great achievements, private steel pipe enterprises rise suddenly, steel pipe standard system continues to improve, occupy the technical equipment high ground......

But at the same time, we must also realize that China's steel pipe in the variety of research and development, quality control and other aspects, there is still a gap with the strong steel pipe, currently there are two weaknesses (intelligent manufacturing and environmental protection), two weaknesses (steel pipe products and raw materials quality instability).At present, the primary task is to "strengthen weak links, strong and weak items."

Since the founding of the People's Republic of China 70 years ago, the steel pipe industry in China has grown rapidly with the development of the steel industry and made great achievements.In 1994, the output of seamless steel tube reached 3.04 million tons, making China the largest seamless steel tube country in the world.In 2001, the output of welded pipe reached 6.04 million tons, making China the largest welded pipe country in the world.In 2004, the output of steel pipe reached 21.49 million tons, making China the largest steel pipe country in the world.

Occupy technical equipment commanding heights.The rapid development of steel pipe industry in China benefits from the introduction of advanced steel pipe technology and equipment and the support of the localization of related technology and equipment.At present, the seamless steel tube production line has more than more than 500, production capacity of 43 million tons, of which precision pipe unit has a diameter of 114 mm of CPE unit and a diameter of 258 mm of PQF LRC England and a diameter of 180 mm to 460 mm of PQF MPM unit, has the world's largest 360 mn (36000 tons), vertical tube extrusion unit, a diameter of 460 mm ASSI three roll pipe unit, a diameter of 720 mm cycle type tube rolling units, 1500 mm diameter pipe jacking units and 4 sets of nuclear power U tube units,Occupy the world seamless steel tube technical equipment commanding heights.

In addition, China has more than 2,700 complete production lines of welded pipe technology and equipment, with a total production capacity of more than 66 million tons.With the world advanced level of units (production lines), including 1422 mm diameter of the straight seam submerged arc welding tube units, 610 mm diameter of the ERW (resistance welded tube) units and 610 mm diameter of SEW (high frequency welding hot rolling) units, the diameter of 90 mm coiled tubing units, occupying the world's welding pipe technical equipment high ground.

Market economy helps private steel pipe enterprises rise.Private enterprises account for about 90% of the national steel pipe output, which has made an important contribution to China becoming the largest steel pipe country in the world.

The reform and opening up established the socialist market economic system. With the support of the policy, the private steel pipe enterprises mushroomed like bamboo shoots after a spring rain. They first grew in the field of ordinary steel pipe products in a large area, and then gradually extended to the field of medium and high-end products.Over the past 70 years, China's steel pipe industry has formed such corporate structure characteristics: large state-owned enterprises take the lead in occupying the technical high ground, high-grade products accounted for a relatively large;Private enterprises account for the majority of the market share, medium and low-end products accounted for a relatively large.

The enterprise management team and scientific research team of steel pipe industry grow vigorously.The competition of enterprises in the market is ultimately the competition of talents.Since the founding of new China over the past 70 years, China's steel pipe industry has turned out a large number of talents, such as the China academy of engineering guo-mao Yin of seamless steel pipe, welding business of China academy of engineering he-lin li and other scientific research elite, the older and the abundant practice, summed up a batch of excellent theory of science and technology achievements, such as tianjin steel tube company by modern continuous seamless steel tube production, rewinded into chengdu seamless steel tube company chief engineer ChengHaiTao climb by seamless steel tube defects and prevention etc.As the older generation of intellectuals take a back seat, the new generation of young and middle-aged science and technology elites come on the stage of China's steel pipe and shoulder the historical task of pushing China's steel pipe to a new climax of modernization and intelligence.

Form rich breed, specification and perfect market system.China is the world's largest developing country and the world's second largest economy, and the domestic downstream industry market demand is strong.After 70 years of development, China's steel pipe industry has built a rich varieties, specifications and perfect market system, supply downstream industries using steel pipe demand, independently in the layout of the complete market system, in Europe, America, southeast Asia, Africa and other countries and regions along the "area" layout also has carried on the market.

Lead technology upgrading, tap the potential of production lines, and constantly improve the core competitiveness of enterprises.With the development of The Times, the downstream industry's requirements on steel pipe are constantly improved. For example, the oil and gas industry requires the gas pipeline to increase the volume of gas transmission, and the steel pipe is required to have a large diameter and a large wall thickness.Under the environment of low temperature (-15℃), the bending strength ratio of pipeline steel should be lower than 0.90.The heat resisting temperature of stainless steel tube for boiler of ultra-supercritical power station is raised from 600℃ to 650℃.And so on.In the face of such requirements, steel pipe industry on the one hand through the existing technology transformation, such as baotou steel seamless steel pipe company to upgrade the diameter of 100 mm seamless steel pipe production line, to the middle, high-end transformation;On the other hand, a new high level production line (in line with the principle of equivalent replacement) or key equipment is built to improve the process and product level, such as the world's first set of three-roll continuous rolling seamless steel tube unit with a diameter of 89 mm designed by China metallurgical saidi for fengbao pipe industry in linzhou.

Develop new products, catch up with world leading level.After the reform and opening up in 1978, China's steel pipe industry has narrowed the distance with foreign advanced steel pipe manufacturing level through "overtaking on the curve", and developed a series of new products on the basis of independent innovation.For example, the third-generation nuclear power technology developed by baosteel, the 690 alloy u-tube for CAP1400 nuclear power, has reached the world's leading level.In terms of coal-fired boiler tubes, China has built 600c ultra-supercritical steam units with a size of about 122.4 billion kw (141 units), accounting for 80% of the installed capacity of similar units in the world, ranking first in the world.The high temperature alloy seamless steel tube developed by hubei xinye steel co., LTD is used in the manufacture of key engine components of China's military products, such as carrier rocket and strategic weapons, and has made an important contribution to the development of China's aerospace and national defense.

The steel pipe standard system has been continuously improved, and is gradually in line with international standards.Over the past 70 years, the standardization system of steel pipe industry has been gradually improved, the technical level has been continuously improved, and the internationalization degree has been pushed forward in an orderly manner. In addition, a number of steel pipe standards in boiler, petroleum, chemical, Marine engineering and other fields have been newly formulated and revised, including national steel pipe standards, steel pipe industry standards and group standards of China iron and steel industry association.For example, the national standard of pipe and casing used in the pipeline transportation system of China's oil and gas industry is compiled with reference to API standard and ISO international standard.Baosteel co., LTD. 's proposal of "seamless oil well tube online cooling control technology for casing production" has successfully passed the application for bid acceptance of API and officially entered the project approval procedure, realizing the zero breakthrough of API standard modification led by Chinese steel tube manufacturing enterprises.

At present, China is already a big country in the world of steel pipe, but it is not a strong country in steel pipe. There is still a gap between China and the strong country in the aspects of variety research and development, quality control, brand influence and technical leadership. It needs to "strengthen the weak board and the strong item", and continue to advance towards the direction of high quality and high efficiency.

At the ninth meeting of the Commission for Deepening Overall Reform of the CPC Central Committee on July 24, 2019, general secretary xi jinping made an important speech, saying that we should "strengthen weak links, strengthen the weak, stimulate vitality and implement them."This indicates the direction of China's efforts from a major steel pipe country to a major steel pipe country.

First, we need to strengthen our areas of weakness, including energy conservation, environmental protection and intelligent manufacturing.In energy conservation and environmental protection ways, at present, steel industry and environmental protection new technology innovation and application of the difficulties and risks, the transformation of investment and running expense, need around flue gas desulfurization denitration, efficient dust removal system transformation, unorganized emissions management, internal transportation, bulk material products, such as clean transportation and environmental management problems, developed a new technology of low cost and good effect.From the point of intelligent manufacturing, iron and steel industry in our country is a relatively high degree of automation of process industry, although the present intelligent manufacturing results showing, but there is still intelligent manufacturing level is not balanced, the lack of standards, software and professional human resources reserves, products with poor compatibility and integration, the innovation ability is not strong, the lack of mature industry solution and so on.In the future, the development of intelligent manufacturing of steel pipe industry should aim at improving the enterprise's capability of product efficient research and development, stable product quality, flexible production organization and comprehensive cost control.

The second is the two "strong and weak items", including improving product quality and raw material quality instability.In terms of product quality instability, steel pipe in our country can produce high-end products, but can not guarantee the quality stability, so that customer loss, enterprises should make more efforts in production control ability, stability and other aspects.In terms of unstable raw material quality, it is necessary to realize that the quality problem of steel pipe is closely related to the pipe material, and the unqualified pipe material is mostly related to the work of steelmaking or rolling link.In China's steel tube industry, there are few steel tube enterprises that can produce their own raw materials (seamless steel tube billets/welded steel tube strip). Most seamless steel tube enterprises purchase steel tube billets through the market, while welded steel tube enterprises purchase steel tube strip through the market.The raw material supply channel is complex, it is difficult to ensure the quality of steel pipe raw material stability.

In addition, real estate, cars and other market demand has now tend to be saturated, the steel pipe industry to control the excessive growth new capacity and output, optimize the structure of variety, varieties, market differentiation strategy, the development of characterization, differentiation, products of high quality products, continue to move forward in the direction of high quality and high benefit, to achieve goals, steel tube power struggle.