1. Subdivided applications in national railway trunk lines
Regional economic liaison lines: In connecting regions with similar economic development levels and medium-sized cities, such as the railway lines connecting Jiaxing-Huzhou in the Yangtze River Delta and Zhongshan-Jiangmen in the Pearl River Delta, the transportation volume is stable but has not reached a super-large scale. These lines use 50KG heavy rails, which can not only meet the demand for 10-20 pairs of passenger and freight trains per day, but also effectively control construction costs.
Complex terrain lines: In some sections of railway trunk lines that pass through complex terrain such as mountains and hills, 50KG heavy rails are lighter in weight and are easier to deal with construction difficulties under complex terrain conditions during the laying process. For example, in the construction of railways in the southwestern mountainous areas, some sections that require bridges and tunnels are dense. 50KG heavy rails can reduce the lifting load of construction equipment, reduce construction difficulty and safety risks. At the same time, its moderate carrying capacity can also meet the relatively low transportation volume demand of mountain railways, taking into account safety and economy.
Upgrading and renovating existing lines: For some existing railway trunk lines that have been built for a long time and have gradually increased transportation volume, if the cost of replacing them with 60KG or 75KG heavy rails is too high during upgrading and renovation, 50KG heavy rails can be selected for partial replacement or additional laying.
2. Diversified Application of Railways in Factory and Mine Enterprises
Internal transportation in steel enterprises: In steel enterprises, 50KG heavy rails are often used to connect railway transportation lines in major production areas such as blast furnaces, converters, and rolling mills. The goods transported by these lines are mainly molten iron, steel billets, etc. Although they are heavy, the transportation distance is relatively short and the running speed is not high. 50KG heavy rails can withstand frequent heavy-load transportation, and due to their low cost, they can effectively reduce the railway construction and maintenance costs of enterprises.
Mining and transportation lines: In mining areas such as coal mines and metal mines, 50KG heavy rails are suitable for underground or ground transportation lines. For underground transportation lines, 50KG heavy rails are light in weight and easy to lay and carry in narrow lanes; in ground transportation lines, they can meet the daily transportation needs of mines for ore, coal and other materials.
Port railway dedicated lines: Inside the port, 50KG heavy rails are used to connect the railway dedicated lines of docks, yards and loading and unloading equipment. Ports transport a wide variety of goods, including containers, bulk cargo, etc. The transportation volume is large but the train speed is slow. 50KG heavy rails can adapt to the complex operating environment of ports and withstand the impact of frequent loading and unloading operations on the tracks. At the same time, its cost advantage helps ports to reasonably control investment in infrastructure construction and improve economic benefits.
3. Special applications of urban rail transit
Subway branch lines and extension lines: In the urban subway network, some branch lines or extension lines, such as the subway branch lines connecting the suburbs and the main urban area, have relatively small passenger flow, with an hourly passenger flow of about 10,000 to 20,000 during peak hours. These lines use 50KG heavy rails, which can not only meet the operation requirements of subway trains, but also reduce construction costs. At the same time, the weight of 50KG heavy rails is relatively light, and when laid in subway tunnels, the bearing pressure on the tunnel structure is relatively small, which is conducive to ensuring the safety and stability of the tunnel structure.
Light rail and tram lines: For urban light rail and tram lines, 50KG heavy rails are a common choice. The vehicle axle weight of light rails and trams is light and the running speed is relatively slow. The bearing capacity and performance of 50KG heavy rails can fully meet their use requirements. In addition, when laying light rail and tram tracks on urban roads, 50KG heavy rails are light and easy to install, which can reduce the impact on urban road traffic and shorten the construction period.