Hot strip requirements for SSAW steel pipe: control the chemical composition of the hot rolled strip is mainly to reduce the carbon content of parathion, and appropriate to add titanium, vanadium, niobium content. Reduce the carbon content, can effectively improve the steel weldability; reduce sulfur content in the steel to improve the toughness of steel pipe and crack injection of only useful, but also reduce sulfide buildup, improving crack resistance of steel, At the same time, reduce the sulfur content may improve the surface quality of the steel strip. For phosphorus steel toughness and weldability are harmful, compared to other common elements in steel, phosphorus strongly improved Charpy impact transition temperature Katsuya have a strong influence on the hardenability and reduce the phosphorus content can directly improve weldability, because some hot-rolled steel strip phosphorus content as low as possible.