The development history of LSAW Steel Pipe is as follows:

Origin and initial development

In the early 20th century, with the development and utilization of energy such as oil and natural gas, the demand for transportation pipelines increased, and LSAW steel pipes began to emerge. The welding technology and steel pipe manufacturing process at that time were relatively simple, but it laid the foundation for the development of LSAW steel pipes.

Technological improvement and process maturity

From the middle to the late 20th century: Submerged arc welding technology continued to develop and improve, and the advantages of stable welding quality, high welding productivity, no arc and little smoke gradually emerged, providing technical support for the high-quality production of LSAW steel pipes. At the same time, UOE, JCOE, HME and other forming processes have appeared and improved one after another, which has further improved the production efficiency and product quality of LSAW steel pipes, and can produce large-diameter, thick-walled, high-strength steel pipes, meeting the higher requirements for pipelines in the fields of oil and gas transportation.

1980s: Internationally, industrially developed countries such as Europe and the United States have been relatively mature in the production and application of LSAW steel pipes, and the proportion of non-melting flux has gradually increased, further improving welding quality and production efficiency.

Wide application and development around the world

From the end of the 20th century to the beginning of the 21st century: With the development of the global economy and the advancement of infrastructure construction, LSAW steel pipes have been widely used in many fields such as oil, natural gas, water conservancy, electricity, and construction. In large-scale oil and gas pipelines, when passing through Class 1 and Class 2 areas such as high-altitude cold areas, seabeds, and densely populated urban areas, straight seam submerged arc welded pipes are the only designated applicable pipe type, and their advantages in long-distance and high-pressure transportation have been fully utilized. Countries have increased their research and investment in LSAW steel pipe production technology, continuously improved product quality and production efficiency, and reduced production costs to meet the growing market demand.

China's development history

After the reform and opening up in the 1980s: The Chinese government actively promoted infrastructure construction and provided a broad market space and policy support for the LSAW industry. Domestic steel pipe companies seized the opportunity and began to introduce advanced foreign welding technology, non-destructive testing technology, and forming technology, continuously improving product quality and reducing production costs, and gradually established their own LSAW steel pipe production system.

Since the 21st century: China's LSAW industry has made remarkable achievements in technological innovation, capacity expansion, and product quality improvement. Domestic enterprises are not only able to produce LSAW steel pipes of various specifications and quality requirements that meet the needs of the domestic market, but also actively expand the international market, with the export share increasing year by year, becoming an important supplier in the global LSAW market. At the same time, domestic enterprises are also actively carrying out independent research and development, and have launched a series of LSAW products and production processes with independent intellectual property rights, such as improving and innovating on the basis of the JCOE process, improving production efficiency and product quality, reducing costs, and having certain competitiveness in the international market.