After buying the business to seamless steel tubes, steel pipe will carry out the evaluation, in order to ensure the quality of seamless steel tubes, you can select the sample tube to a regular inspection, to determine whether there is a bubble of seamless steel tubes, turning the skin situation, and to see whether there are residues from the sample, which will affect the seamless steel parts are good or bad. Meanwhile, professional and technical personnel may also measure the overall length of the pipeline, we are often used calipers, vernier caliper to measure by. Seamless steel pipe as a main material transport, except for some conventional energy transport, energy will transport a number of other high-pressure seamless tube, such as some of the higher temperature fluid, or some corrosive liquids having a certain overall and Introduction seamless pipe, seamless steel pipe use is still very large. Steel pipe plant in the city, many of the buildings under the water under the same seamless steel pipe is used as the main material. Cold rolling means at room temperature, after cold drawing, cold, cold drawn, such as the processing of cold steel or steel into various types of steel. Advantages: forming speed, high output, and does not damage the coating, can be made into a variety of cross-sectional form, needs to adapt to the conditions of use; cold-rolled steel to produce a lot of plastic deformation, thereby increasing the yield of steel points. Disadvantages: 1. Although the molding process has not been hot plastic compression, but there are still residual stress within the cross-section of global and local buckling resistance of the steel will inevitably have an impact; 2. cold-rolled steel style is generally open section, so that the free section low torsional stiffness. When flexural prone to twisting when pressure is prone to bending-torsional buckling, torsional performance is poor; 3. cold-formed steel wall thickness smaller, in the corner of the plate convergence and no thicker to withstand localized concentrated load capacity is weak. _ _ Seamless pipes seamless alloy tube Ltd. Liaocheng by virtue of Industry. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead virtue of Industry and you work into the brilliant, for a better future!