Aridair - case study - heat needed during railway track laying


	Heat needed during railway track laying Rather than the jointed tracks used in the past, most modern railways use continuous welded rail. This means that trains can go faster, and give passengers a more comfortable journey. But in hot weather, rails expand, and in cold weather, they shrink. Older systems used expansion joints to prevent distortion, but welded track can run for miles without a join. Unless special measures are taken, the track can become distorted and cause a derailment. One of the precautions taken to avoid this is to artificially stress the rails, by heating them to a temperature roughly midway between the average extremes of hot and cold, before fastening them to the sleepers. The controllable heat provided by an Aridair system is ideal for bringing the sections of rail to the optimum temperature.
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Aridair • Units 10/11 Stanfield Business Centre • Addison Street • Sunderland • SR2 8SZ • UK

Heat needed during railway track laying