Steel pipe is not only used to transport fluid and powdery solid, exchange heat, manufacture mechanical parts and containers, it is also an economic steel. With steel pipe manufacturing building structure grid, pillars and mechanical support, can reduce the weight, save metal 20 ~ 40%, and can realize the mechanization of factory construction.
Manufacture of road bridges with steel pipes not only saves steel, simplifies construction, but also greatly reduces the area of coated protective coatings, saving investment and maintenance costs. Therefore, Steel Pipe any other type of steel can not completely replace the steel pipe, but the steel pipe can replace part of the profile and bar. Steel pipe on the national economic development and the improvement of human quality of life is much better, far better than other steel. From the daily necessities, furniture, water supply, ventilation, Steel Pipe ventilation and heating facilities to the manufacture of various agricultural machinery, the development of underground resources, national defense and aerospace use of guns, bullets, missiles, rockets and so on are inseparable from the steel pipe.
The development of steel pipe production technology began in the rise of bicycle manufacturing, the development of oil in the early 19th century, the manufacture of ships, boilers and aircraft during the two world wars, the manufacture of thermal power boilers after the Second World War, Steel Pipe the development of chemical industry, Oil and gas drilling and transportation, are strong to promote the steel industry in the variety, yield and quality of the development.
Manufacture of road bridges with steel pipes not only saves steel, simplifies construction, but also greatly reduces the area of coated protective coatings, saving investment and maintenance costs.
The steel pipe can be classified according to the rolling process, whether there is a seam and a cross-sectional shape. According to the rolling process classification, the steel pipe can be divided into hot-rolled steel pipe and cold-rolled steel pipe; according to whether the steel pipe seam classification, steel pipe is divided into seamless steel pipe and welded steel pipe, which commonly used welded pipe by weld type can be divided into high-frequency welded pipe , Straight seam submerged arc welded pipe, spiral submerged arc welded pipe 3 kinds.
Steel pipe with double-sided submerged arc welding process, welding under static conditions, high weld quality, short weld, resulting in a small chance of defects. Steel pipe through the full length of the expansion, tube shape, size, precision, steel pipe wall thickness range and diameter range, Steel Pipe diameter range of up to 406-1829mm, wall thickness of up to 6.0-60mm, high degree of automation, and seamless Compared with the steel pipe, the production cost is low, suitable for construction, bridge, dam, Steel Pipe offshore platform and other steel structure bearing column, large span building structure and the requirements of wind and vibration of the pole tower mast structure.