Continuous welded rail can suffer rail buckling in extreme heat, or break in extreme cold as thermal stress builds within the track. At Pandrol, we support rail stress management across the full lifecycle of the railway, from design through to ongoing monitoring, helping networks stay ahead of a growing climate-driven challenge.
Rail buckling and breaking are a significant but often hidden risk for track engineers. Continuous welded rail expands and contracts with temperature, building compressive stress in the heat and tensile stress in the cold. Left unmanaged, that stress can cause buckles in extreme heat or breaks in extreme cold, both putting safe train operation at risk.
Climate change is driving more frequent temperature extremes, making active management of this risk more critical than ever. Industry best practice is to manage rail thermal stress through proactive monitoring and maintenance of the rail's stress-free temperature (SFT).
Establishing and maintaining the SFT allows track engineers to balance the peak tensile and compressive stresses within the rail, reducing the risk of buckles and breaks before they occur. For networks running long stretches of continuous welded rail, especially in variable climates, this discipline of CWR track maintenance is essential to keeping trains running safely and on schedule.
Pandrol supports customers from the earliest design stages through to daily operation. We design, specify and supply track components that strengthen long-term structural integrity, giving networks a stronger foundation before thermal stress becomes a risk. This proactive approach to rail stress management underpins everything that follows.
Our VERSE system measures a rail's stress-free temperature directly and non-destructively, without the need to cut the rail. Networks can monitor rail neutral temperature and plan maintenance with confidence. VERSE has taken over 200,000 readings and is used in more than 20 countries worldwide.
Where rail destressing is needed, the Vortok Stressing Roller allows controlled, low-friction movement of the rail. The Rail Stressor TR75 stretches and secures long welded rail ahead of aluminothermic welding, supporting safe, efficient maintenance on site. Together with VERSE, these tools give networks a complete toolkit for managing thermal stress at every stage.
Below are other Pandrol products and equipment that can be integrated with this product. These complementary items can be used alongside this product, or are required for use with this product, or enhance the use of this product.
Conventional LinesPandrol Rahee Technologies was successful in securing a pilot project with Indian Railway to trial the use of the VERSE for North Eastern Railways (NER) at different climatic conditions.
Did you know?
Pandrol has manufactured so many rail fastenings over its history that if you lined them all up, you would have enough to build a railway track that stretches all the way from the Earth to the Moon (and we are currently working on the return trip!).
