How Welding Helped Build Seismic Stoppers for Bullet Trains

Published on 21 February 2025

5 min

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Safety is a fundamental concern in high-speed rail projects, especially in earthquake-prone areas. Seismic stoppers are crucial safety features in bullet trains, designed to absorb the shock of earthquakes and prevent derailments. Their effectiveness depends on advanced engineering, high-quality materials, and exceptional structural integrity. High-precision welding is essential in ensuring the reliability of these stoppers, creating strong, defect-free joints that can withstand dynamic stress and vibrations. At D&H Sécheron, our premium welding consumables and expertise are key in manufacturing these vital components, boosting their safety and durability in the most challenging conditions.

What Are Seismic Stoppers and Why Do Bullet Trains Need Them? 

Seismic stoppers are critical safety mechanisms that stabilize bullet trains during earthquakes,  preventing derailments and reducing structural damage. Designed to absorb and distribute seismic forces, they help maintain train stability despite strong vibrations. To meet the stringent strength and durability requirements in earthquake-prone regions, advanced welding techniques like flux-cored arc welding (FCAW) and shielded metal arc welding (SMAW) are essential. These techniques ensure the creation of strong, defect-free joints, preserving the structural integrity of seismic stoppers and enabling them to endure the extreme forces generated by seismic events.

Case Study: Fabricating Seismic Stoppers for a Bullet Train Project

D&H Sécheron was key in fabricating seismic stoppers for a significant bullet train project. We addressed the challenge of ensuring welded joints could withstand seismic shocks while maintaining long-term structural integrity. Precision and quality control were critical at every stage of the welding process. We utilised advanced welding solutions and high-quality products, including Maxflux SAF-7S, to meet these challenges, ensuring defect-free, high-strength joints. Our expertise and dependable consumables were instrumental in the project's success, enhancing safety and reliability under extreme conditions.

Products Used in the Project 

In addition to our premium flux, several other high-performance welding products were used in the fabrication of seismic stoppers:

  • Maxflux SAF-7S: A premium flux that guarantees high-quality welds and exceptional performance in critical infrastructure projects

  • Autotherme Gr. E: Renowned for its reliability and strength, making it ideal for heavy-duty welding applications

  • Autotherme 1: Provides precise heat control, ensuring accuracy in structural welding

  • F 70S2: A versatile welding wire that delivers high-strength joints, ensuring the long-term durability of seismic stoppers

These products were selected for their exceptional metallurgical properties, ensuring that the seismic stoppers could endure extreme stress and challenging environmental conditions.

Why Using the Right Welding Products Matters 

Fabricating seismic stoppers requires precision, strength, and durability, making the choice of welding consumables critical. High-quality products ensure safety by preventing component failure, enhance durability by extending the lifespan of seismic stoppers, and ensure resistance to extreme conditions like seismic shocks, high-speed vibrations, and extreme temperatures. Our products comply with global railway safety standards, making them ideal for bullet train infrastructure. Using trusted brands like D&H Sécheron offers long-term benefits, including reduced maintenance costs, increased reliability, and enhanced safety, ensuring the structural integrity of critical components.

Welding’s Role in Safe and Reliable Bullet Train Projects 

Welding is essential to the safety and reliability of railway infrastructure, particularly in high-speed rail projects. Precision welding, from seismic stoppers to track joints, ensures bullet trains operate securely under even the most challenging conditions. By using high-quality welding consumables like Maxflux SAF 7S, Autotherme Gr. E, Autotherme 1, and F 70S2, we've enhanced the safety and efficiency of bullet train travel.

At D&H Sécheron, we take pride in delivering high-quality welding solutions that meet the demands of even the most challenging projects. Our expertise and commitment to excellence ensure that our products are always at the forefront of innovation and reliability. Check out our case study for a detailed look at how we fabricated seismic stoppers for a bullet train project. Contact us today! for inquiries about our welding products and how they can support your infrastructure projects.


 

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