The seamless steel pipe is made by perforating the whole round steel, and the steel pipe without weld seam on the surface. It is mainly used as high-precision structural steel pipes for petrochemical industry, boiler pipes, automobiles and aviation.
Seamless tubing can be made from any of several alloys and metals, such as carbon steel, stainless steel, molybdenum, or tungsten. Seamless pipes are used in those industrial applications that require the highest safety requirements. To produce seamless steel pipes, the solid block is pierced with a piercing plug before the pipe is drawn to the desired size.
Some of the differences between seamless and welded pipes are:
Seamless pipes are extruded and drawn from billets, while welded pipes are produced from roll formed and welded strips.
Due to the higher range of security offered by seamless pipe, it is more expensive than welded pipe.
Seamless pipes are available in relatively short lengths, while welded pipes can be manufactured in longer continuous lengths.
Seamless pipe generally does not show any signs of corrosion until and unless it is subjected to a highly corrosive environment, whereas in welded pipe the welded area is more susceptible to corrosion attack.
The welded area is considered to be inhomogeneous, so it exhibits different ductility and lower corrosion resistance, as well as larger dimensional changes. Seamless pipes eliminate any such problems and thus offer high corrosion resistance.
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In the first half of this year, the total industrial output value of the above-scale industries in the entire county of Dongliao County was 1,119.56 million yuan, a year-on-year increase of 23%.
According to research, in the first half of this year, the industrial added value of above-scale industries in Dongliao County actually completed 348.391 million yuan (calculated at comparable prices), a year-on-year increase of 13.9%. The gross industrial output value above designated size actually completed 1,119.856 million yuan, a year-on-year increase of 23%. Dongliao County takes the construction of the First District Five Garden as its key point, forming a special industrial economy system and industrial clusters for machine tools, metallurgical machinery, automobile refitting, construction machinery and circular economy, leading the industry with new, special, and excellent development of.
Dongliao County focuses on “scientific and technological innovation†in attracting investment and project construction in order to cultivate key enterprises. As the leader of the machining and die industry park, Fangda Forging Co., Ltd. has made great contributions to technological innovation. It adopts advanced roll forging technology and robot-assisted production technology to realize automated production of large-scale forging production lines, greatly reducing the labor intensity of workers and reducing raw materials. Consumption. In the first half of this year, three new products, Steyr front axle, Steyr knuckle, and 126*5 rack, were developed to form new economic growth points. In the second half of the year, we will continue to expand the market and increase the efforts to develop new products. We will strive to develop five new products. Continue to provide new product forgings for Beiqi Foton, Baotou North Mercedes-Benz, Xuzhou Meritor, Shanxi Coal Machinery Factory, and Longwall Coal Captain. Jilin Province Longlongda Tooling Equipment Co., Ltd. has been adhering to innovation through science and technology for many years. The company has 23 independent research and development patents, of which 7 are invention patents, 1 has been authorized, 6 have been accepted, and 16 utility model patents have been obtained. Authorization. At the same time, this year will focus on cooperation with foreign companies such as Mexican Volkswagen and German Agria. Jilin Province Science and Technology Department was identified as "Jilin Province science and technology enterprises" and high-tech enterprises, "auto sheet metal stamping die products" was rated as provincial-level brand-name products ... ... Yuanlongda people with innovation to build a development stage.
Dongliao advantage project has emerged strongly. The "excellence" of the project is not only reflected in the "big", but also reflected in the "existing". Fangda Forge, Liaoyuan Automobile Modification, Yuanlongda Mould, Liaoyuan City Feiyue Mould, Dongsheng Metallurgy, Jinyi Egg Products Co., Ltd., Dongyue Heavy Industry and other county-level projects and key enterprises have grown. Dongliao County has rich resources such as bentonite and china clay, which rely on these high-quality resources to promote industrial development and promote the optimization and upgrading of industrial structure. In order to better support the development of the enterprise, it also innovative ways to achieve quality services. Take the establishment of key projects "in the factory office" to carry out "one-stop" service, the administrative examination and approval unit centralized on-site office; carry out the "flags" activities of the pacesetter enterprise, create a development atmosphere; foster small and medium-sized enterprise incubator bases, and now four households have entered At the production stage, the government affairs hall adopts "one-stop" services and other methods to create a high-quality service area.