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Engineered for seamless integration, high-temperature stability, and reliable performance across Moscow's transit networks.
As the largest transport hub in Eastern Europe, Moscow is undergoing an unprecedented expansion of its urban transit and heavy industrial rail infrastructures. The rapid growth of the Moscow Metro, including the massive Bolshaya Koltsevaya Line (Big Circle Line), the modernization of the Moscow Central Circle (MCC), and the integrated Moscow Central Diameters (MCD) commuter rail network, has generated massive demand for high-strength, low-maintenance track systems. Continuous Welded Rail (CWR) technology is the backbone of these modern systems, drastically reducing vibration, wear, and noise in densely populated urban zones.
However, Moscow's extreme continental climate presents severe challenges. With winter temperatures plunging below -30°C and summer temperatures rising above +30°C, steel rails experience immense thermal expansion and contraction. Standard joints are highly susceptible to fracturing under these stress cycles. This makes exothermic (aluminothermic) welding the primary, most reliable method for joining rails. It creates a molecular bond with metallurgical properties identical to the parent steel, ensuring that Moscow's rail lines remain safe, seamless, and operational throughout the freezing winters and hot summers.
Modern infrastructure projects in Moscow demand rapid deployment, strict environmental compliance, and long-term durability. The industry is currently moving towards several key advancements:
With underground tunnels like those in the Moscow Metro requiring strict air quality controls, there is a strong demand for low-smoke, eco-friendly thermite portions that minimize hazardous emissions during ignition.
To minimize track closure windows on busy commuter lines like the MCD, contractors favor pre-lined, single-use crucibles that eliminate the time-consuming process of cleaning and relining traditional multi-use crucibles.
Specialized preheating burners and sand moulds designed to withstand rapid thermal shocks are crucial for performing rail repairs during Moscow's long winter maintenance windows without compromising weld integrity.
RMTS is a premier manufacturer specializing in railroad thermit welding materials, based in Tianjin, China. With a state-of-the-art factory spanning 5,500+㎡ and a dedicated team of 30+ industry professionals, we are committed to delivering reliable, high-performance thermit welding solutions to clients across the globe, including key industrial partners serving Moscow and the wider region.
We understand that successful rail welding projects require not only top-tier consumables but also precise technical expertise. That is why RMTS offers comprehensive, localized support, including detailed project welding instructions and on-site training programs. Our experienced technical teams provide hands-on guidance to ensure local crews achieve perfect welds that meet local regulations and international standards, ensuring transit safety and operational efficiency.
RMTS invests heavily in material science and mechanical engineering to develop products tailored for challenging environmental conditions like those in Moscow.
RMTS features a highly skilled R&D team that works tirelessly to ensure we produce thermit welding materials tailored to the specific metallurgic properties of various rail profiles, including Russian standard GOST rails and international UIC specifications.
In addition to strong R&D, RMTS actively collaborates with railway authorities, municipal transit operators, and maintenance contractors worldwide, adapting our technologies to local high-speed, heavy-haul, and light transit tracks.
By participating in major transit and freight projects, RMTS contributes directly to the safety and longevity of urban metro networks, cargo lines, and high-speed corridors, ensuring long-term structural reliability under heavy traffic.
RMTS maintains close partnerships with leading metallurgical research institutes and universities, keeping us at the forefront of aluminothermic reaction safety, crucible insulation technologies, and automated ignition systems.
We offer two distinct crucible systems to meet the varying operational tempos and logistical requirements of Moscow rail projects:
Designed for maximum efficiency and speed. The single-use, pre-packaged crucible minimizes setup times, eliminates the need for patching materials, and reduces the overall labor footprint on track. Ideal for rapid night-shift maintenance windows on the Moscow Metro.
A cost-effective solution for large-scale new track installations where continuous welding is scheduled over weeks. Built with high-grade refractory lining, these crucibles can be reused for dozens of welds with minor maintenance, reducing per-weld material costs.
Aluminothermic welding plays a critical role across diverse logistics and transport sectors in the Moscow metropolitan area:
Exothermic welding requires precise planning of materials. Thermit portion (powder), sand mould, luting sand, and ignitors are packaged as single-use sets (1 weld = 1 set of consumables).
For a standard rail installation project, the quantity of consumables required is calculated based on the length of the track and the individual rail lengths.
Example: 10km Project using 12.5m long rails
Calculation: (10,000m / 12.5m) × 2 lines = 1,600 sets of consumables
Note: It is recommended to order an additional 3-5% buffer to account for on-site alignment adjustments and training welds.
Aluminothermic welding utilizes a highly exothermic chemical reaction between iron oxide and aluminum powder. When ignited, the reaction reaches temperatures exceeding 2500°C, producing molten steel that flows into the sand mould cavity, melting the rail ends and fusing them into a continuous, seamless joint. This historic technology has evolved into a highly controlled process offering extreme mechanical reliability.
Pre-heating & Alignment: Ensure the rail ends to be welded are clean, completely free from rust, scale, and moisture. The gap size between the two rails must be maintained at 26±2mm for optimal molten steel volume and fusion depth.
Moisture Prevention (Critical for Moscow): Thermit welding materials react violently with moisture. All portions, sand moulds, and luting sand must be stored in dry, heated environments. During winter installations in Moscow, heating enclosures must be used to keep the rail ends and welding kits dry before and during the welding process.
Explore our complete catalog of materials and specialized machinery engineered for professional rail installation and maintenance in Moscow.
