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WELDING OF HEAD HARDENED RAILS WIDE GAP JOINTS COMBINATION JOINTS OF DIS-SIMILAR RAIL SECTONS
WELDING OF 110UTS ALLOY STEEL RAILS COMPRESSED AIR-PETROL PREHEATING AUTOMATIC TAPPING THIMBLE


   WIDE GAP JOINTS

The Thermit wide gap (75mm) welding process has been developed to replace defective welds (Alumino-Thermic, Flash Butt or Isolated Rail Defects). This eliminates the need to install a fresh length of rail, usually by welding on both ends.

The procedure involves removing the defective weld, aligning and creating a gap of 75mm 2mm between the rails and fixing the requisite wide gap prefabricated mould around the rail gap. The remaining steps are same as the regular SKV technique. The time for preheating the rail ends are as follows:



Rail Section Preheating Time
With Drum Vapouriser With Compressed Air Petrol System
60 Kg. 12 Minutes 4 Minutes
52 Kg. 10 Minutes 4 Minutes
90 R 8 Minutes 3 Minutes

     The Thermit portion and the reaction crucible are of a bigger size.





Click to enlarge


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The India Thermit Corporation Ltd.
84/22, Fazalganj, Kanpur - 208 012 (U.P.)
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