Spiral steel pipe used as transport oil, artificial gas, gas, water and some solid materials, pipes and so on. Steel pipe and solid steel bar, etc. compared to the amount of large quantities of pipes for transporting fluids. Flexural torsional strength, lighter weight, an economic cross-section steel, widely used in the construction of structural parts and mechanical parts, such as drill pipe, automotive drive shafts, bicycle frames and construction using steel scaffolding.
Lower carbon content, can reduce the problem of sulfide inclusions, spiral steel pipe for the specific requirements can effectively improve the weldability of steel; reduce the sulfur content in steel to improve the toughness of injection pipe and the arrestability beneficial. Improve crack resistance of steel, while reducing the sulfur content can enhance the quality of steel.
Phosphorus toughness steel strip and weldability of the steel are harmful elements other rare contrast, the spiral steel pipe P also has a strong influence rigid, reducing the phosphorus content can proceed directly weldability, because some hot-rolled steel phosphorus content with better. And an appropriate increase in titanium, vanadium, niobium content. Hot rolled steel strip chemical composition control is important is to reduce the carbon content of parathion. This spiral steel pipe to be qualified.
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