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The types of rails are typically classified by their mass per meter. In China, the commonly used rail types on railways include 75 kg/m, 60 kg/m, 50 kg/m, 43 kg/m, and 38 kg/m. These rails all feature an I-beam cross-sectional design, which provides excellent resistance to bending and includes key components such as the rail head.
Light rail: Rails with a weight per meter less than or equal to 30 kg are classified as light rails. Common specifications used in China include 8 kg/m, 12 kg/m, 15 kg/m, 18 kg/m, 22 kg/m, 24 kg/m, and 30 kg/m. These rails are primarily used for transport lines and tracks for light locomotives in locations such as mines, forestry areas, factories, and construction sites.
Railway rails are used for laying railway tracks, and must withstand the pressure, impact loads, and friction generated during train operations. Therefore, they are required to have sufficient strength and high toughness. The quality standards are strict: in addition to ensuring the appropriate chemical composition, tests on mechanical properties, drop hammer tests, and macrostructure examination using acid etching are also required. According to railway standards, the main types of heavy rails are those weighing 50 kg/m and 60 kg/m.
Rail defects refer to the occurrence of fractures, cracks, and other damages during the use of rails that affect or limit their performance. For the purposes of statistical analysis, these defects are classified into categories. Based on the location of the defect on the rail cross-section, the appearance of the defect, and the cause of the damage, rail defects are divided into nine categories with a total of 32 types. The classification uses a two-digit code: the first digit indicates the part and condition of the defect, while the second digit represents the cause of the defect.
Track maintenance is carried out to ensure the track remains in good condition, allowing trains to operate safely, smoothly, and without interruption at the designated speeds. Maintenance activities include both track renewal and regular repairs, covering tasks such as replacing track components, rehabilitating the track bed, and correcting track deformations. This approach uses condition-based maintenance, which involves monitoring the state of the track to perform targeted repairs, preventing and addressing deformation and defects caused by dynamic forces from trains. The goal is to extend the service life of track components and avoid economic losses caused by equipment neglect.
Mr. Zhao+86 175-5952-0666+86 185-3108-8121+86 132-3103-8968
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200 meters south of the intersection of Zhonghua North Street and Kaituo Road, Congtai District, Handan City, Hebei Province, west of the road
