The main difference between hot and cold are: 1, cold-formed steel section appear to allow local buckling seamless pipes, which can make full use of the bearing capacity after buckling rods; and hot-rolled steel section does not allow local buckling occurs. 2, for different reasons, and cold-rolled steel hot-rolled steel residual stress, so the distribution of the cross section is also very different. Cold-formed steel section of residual stress distribution on the curved type gb8163 seamless pipes, and hot rolled steel or welded steel section on the residual stress distribution is a film type. 3, hot-rolled steel of freedom high torsional stiffness than the cold-rolled steel, hot-rolled steel so torsional performance is better than cold-rolled steel. Liaocheng virtue Pipe Co., Ltd. is a professional Luxi steel materials circulation enterprises, Baotou Steel Tube Plant and Tianjin Seamless Steel Tube Plant of special agents 20g seamless pipes, the main pipe, seamless steel pipe, large diameter no seam pipe, seamless steel pipe and other pipe; steel stock company complete specifications, adequate supply, existing stocks more than 10,000 tons l360 seamless pipes, more than 800 kinds of pipe specifications. The company most to help customers receive acceptances, loading free shipping holidays as usual, and for users to arrange transportation, swap places remaining, welcome customers and friends to visit us! 3087 seamless pipes, pipe industry virtues (certified), Limited sunshine seamless pipes is provided by virtue Liaocheng pipe industry. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) Shandong Liaocheng, steel leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Industry leaders in the United States and Germany with the staff warmly welcome all inquiries negotiations to create the virtues pipe industry a better future.