Straight seam steel pipe structures can adopt round tube structures or rectangular tube structures according to the specific conditions of the stress conditions, supply conditions, manufacturing and processing conditions, and cost of the components, or the two types of steel pipes can be mixed. When mixed, the chord rod generally adopts a rectangular tube and the web rod adopts a round tube; sometimes, the chord rod can also adopt an I-beam or H-shaped steel, and the web rod adopts a rectangular tube or a round tube. The performance of the pipe section round tube rectangular tube is suitable for axial force, bending, and eccentric force. It is suitable for axial force and torsion components; axial compression and torsion components. The strength is higher when the axis is tensile. The mechanical properties are stable. Although local buckling is prone to occur when under pressure, the post-buckling strength can be used. The anti-fluid dynamic characteristics are more favorable. Under the same cross-sectional area, the surface area is smaller and the surface area is slightly larger. There are correction angles, corrosion resistance and fire resistance, corrosion resistance and fire resistance without edges and corners; fire resistance and anti-corrosion materials are slightly more. Compared with structures made with open sections, about 20% of steel can be saved in industrial buildings, and half of it can be saved in tower structures.
(1) We can use solvents or emulsions to clean the surface of steel pipes. This method is very effective for oil, grease, dust, and other organic matter on the surface of steel pipes.
(2) For rust on the surface of steel pipes, we can use wire brushes and other tools to polish the surface of steel pipes to achieve the purpose of rust removal.
(3) You can also use the spraying method. This method can not only completely clean rust, oxides, and dirt, but also the steel pipe can reach the required average roughness under the fierce impact of abrasives and the effect of friction.
Straight seam steel pipes are not only used to transport fluids and powdered solids, exchange heat energy, and manufacture mechanical parts and containers, but they are also economical steel. Using steel pipes to manufacture building structure grids, pillars, and mechanical supports can reduce weight, save 20-40% of metal, and realize factory-based mechanized construction. Using steel pipes to manufacture highway bridges can not only save steel and simplify construction but also greatly reduce the area of protective coating, saving investment and maintenance costs.
Nowadays, we have a wide range of applications for steel pipes, but in the process of using steel pipes, rust will inevitably occur. Rusty steel pipes will affect their normal use, so if rust is found on the steel pipe, it is necessary to clean it in time. After relevant comparative tests, it was verified that the yield pressure and burst pressure of straight seam steel pipes and steel pipes are consistent with the measured values and theoretical values, and the deviation is close. However, whether it is yield pressure or burst pressure, straight seam steel pipes are lower than steel pipes. The burst test also shows that the circumferential deformation rate of the burst port of straight seam steel pipes is significantly greater than that of steel pipes. This proves that the plastic deformation capacity of straight seam steel pipes is better than that of steel pipes, and the burst port is generally limited to one pitch. This is due to the strong restraint effect of spiral welds on the expansion of cracks.
Post time: Jan-10-2025