Rail is made of steel and is an important infrastructure in railway transportation. Heavy rails and light rails are often used in railway construction. The main difference between heavy rails and light rails is size and weight.
Heavy rails are usually 12 to 30 meters long and weigh more, generally between 50 and 60 kg/m; while light rails are shorter, generally 6 to 12 meters long, and lighter, generally between 30 and 40 kg/m.
1. Overview of heavy rails and light rails
Rail is made of steel and is an important infrastructure in railway transportation. Heavy rails and light rails are often used in railway construction. The main difference between heavy rails and light rails is size and weight.
Heavy rails are usually 12 to 30 meters long and weigh more, generally between 50 and 60 kg/m; while light rails are shorter, generally 6 to 12 meters long, and lighter, generally between 30 and 40 kg/m.
2. Classification standards for heavy rails and light rails
Heavy rails and light rails are classified according to their standards. Specifically, China's national standards divide railway rails into five model grades: 38, 43, 50, 60, and 75. Among them, 38 and 43 are light rails, and 50, 60, and 75 are heavy rails.
1. Distinguishing standards
The distinguishing standard between light rails and heavy rails is their cross-sectional size. According to national standards, the cross-sectional dimensions of light rails are below 43kg/m, and the cross-sectional dimensions of heavy rails are 50kg/m and above.
2. Weight standards
According to national standards, the weight of light rails is generally between 30 and 40kg/m; while the weight of heavy rails is generally between 50 and 60kg/m.
3. Other standards
In addition to the cross-sectional dimensions and weight standards, there are other standards for light rails and heavy rails. For example, during the manufacturing process, heavy rails require high-temperature heat treatment; while light rails do not.
In addition, in terms of bending and deformation, heavy rails have less bending and less deformation. Light rails have a greater degree of bending and more obvious deformation.
3. Conclusion
Heavy rails and light rails play an important role in railway construction. The difference between them is not only in size and weight, but also involves other standards, such as cross-sectional dimensions, weight standards, manufacturing processes, etc. Only by correctly classifying according to national standards can railway construction be more scientific and efficient.
