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Production process of large diameter straight seam steel pipe and application of straight seam steel pipe
Release time:
2021-11-12
Large mouth straight seam steel pipe is a spiral seam steel pipe made of amorphous strip fan coil as raw material, using full-automatic multi-line double-sided submerged arc welding, and often using warm extrusion processing and full-automatic multi-line double-sided submerged arc welding. Raw materials are amorphous strip, cable, flux. They must undergo rigorous physical and chemical testing before they can be loaded in. Wire drawing submerged arc welding or double-wire submerged arc welding shall be used for the head and tail of hot-rolled strip, and full-automatic submerged arc welding shall be used for repairing electric welding after the wire rewinding machine enters the steel pipe. Before forming, smooth, laser cut and polish the amorphous strip, clean and transport the surface, and solve the bending edge.
Large mouth straight seam steel pipe is a spiral seam steel pipe made of amorphous strip fan coil as raw material, using full-automatic multi-line double-sided submerged arc welding, and often using warm extrusion processing and full-automatic multi-line double-sided submerged arc welding. Raw materials are amorphous strip, cable, flux. They must undergo rigorous physical and chemical testing before they can be loaded in. Wire drawing submerged arc welding or double-wire submerged arc welding shall be used for the head and tail of hot-rolled strip, and full-automatic submerged arc welding shall be used for repairing electric welding after the wire rewinding machine enters the steel pipe. Before forming, smooth, laser cut and polish the amorphous strip, clean and transport the surface, and solve the bending edge.
The electric touch barometer is used to manipulate the working pressure of the hydraulic cylinders on both sides of the conveyor belt to ensure the satisfactory transportation of the amorphous strip. Selection of external control or internal control system roller type. Select welding gap operation equipment to ensure that the welding gap considers the welding regulations of electric welding, and strictly control the pipe diameter, staggered edge and welding gap.
The use of online continuous ultrasonic automatic damage instrument to carry out the inspection of electric welding welding, to ensure that 100 percent of the spiral welding non-destructive testing technology penetration rate. If large-diameter straight-seam steel pipes have inventory defects, they can be automatically alerted and painted, and the production and manufacturing staff can adjust the main parameters of the processing process anytime and anywhere to remove the defects immediately. The steel tube was cut into multiple tubes with a gas plasma cutting machine.
After selecting one steel pipe from each of the three steel pipe heads, a rigorous first inspection shall be carried out to check the physical properties, composition, melting standard, process performance and non-destructive testing technology of the steel pipe, so as to ensure that the steel pipe production and manufacturing process reaches the standard before the capital is announced to be put into production and manufacturing.
In recent years, large-diameter thin-walled straight seam steel pipes and high-grade two-sided submerged arc welded straight seam steel pipes have been used in China's steel frame structure industry. They have digested and absorbed the excellent design concepts of imported steel frame structures and attached great importance to the development trend of straight seam steel pipes as structural components. Apart from their application in the engineering construction industry, they have been perfectly used in the harbor vessel machinery and equipment industry and achieved fruitful results.
Compared with other structures, the structural steel pipe can be carried out from the cross-sectional characteristics, physical properties, economic benefits and so on. In recent years, structural steel pipe has obtained the rapid development trend with its excellent characteristics, and its application category basically includes all walks of life of steel frame structure.
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