Circular steel tube is a type of steel material with open ends and a hollow concentric cross-section. Its length is relatively large compared to the surrounding area, and its specifications are represented by external dimensions, inner diameter, and wall thickness, covering large steel pipes ranging from capillary tubes to diameters of several meters. According to the production method, it can be divided into seamless round steel pipes and welded round steel pipes, with materials including 10 #, 20 #, 35 # and other steel models. It is widely used in fields such as petroleum geological drilling, machinery industry, thermal equipment, and building steel structures.
Circular steel tubes are processed using drawing technology, and different cross-sectional products can be obtained by changing the mold hole shape. Cold drawing technology can improve material hardness and strength. The Chinese steel pipe industry has become an important global producer and consumer, with some ultra large diameter steel pipes manufactured using spiral submerged arc welding technology and applied in international projects such as seawater desalination in Saudi Arabia. The industry development trend focuses on high-end, green and intelligent transformation, and the direction of technological upgrading includes efficient welding and automated production lines. Circular steel tube recycled concrete as a load-bearing component of buildings can improve compressive and seismic performance, but recycled aggregates may increase creep deformation and affect bearing capacity
Circular steel tubes can be used for pipelines, thermal equipment, mechanical industry, petroleum geological drilling, containers, chemical industry, and special purposes.
Specifications：
φ32；Thickness:1.2-2.5
φ38；Thickness:1.2-2.5
φ42 ；Thickness:1.2-2.5
φ50 ；Thickness:1.5-4.0
φ76；Thickness:1.5-4.5
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