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钢管是黑色冶金的重要产品之一,其特点是几何尺寸精度高,表面质量好,机械性‘能优良。为了进一步提高钢管的质量、降低其金属用量和制造劳动量,就必须采用最先进的技术,其中之一就是用电焊管代替无缝管制造冷拨管。这样就可以大幅度地提高拨管生产的效率,扩大钢管的品种及其在国民经济中的应用范围。苏联、美国、联邦德国、日本、英国、意大利等国都在大力发展尺寸为0.4～381×
Steel is one of the important products of black metallurgy, which is characterized by high geometric accuracy, good surface quality and good mechanical properties. In order to further improve the quality of steel, reduce its metal consumption and manufacturing labor, we must adopt the most advanced technology, one of which is the use of electric pipe instead of seamless pipe manufacturing cold dial. In this way, the efficiency of dial production can be greatly improved, and the varieties of steel pipes and their applications in the national economy can be expanded. The Soviet Union, the United States, the Federal Republic of Germany, Japan, Britain, Italy and other countries are vigorously developing the size of 0.4 ~ 381 ×