Knowledge of Thermit Welding
When preparing for welding, starting with the rails on both sides of the weld, each side releases 2-4 sets of fasteners, and then fastens rail fasteners within a range of at least 50 m according to the specification, In order to observe whether the rail is moving or not, the first locking fastener on both sides of the weld can be welded by hot aluminum welding.
Rail End Drying:
During the operation of thermit welding, it is necessary to heat and dry the rail in the range of 0.5 meters on both sides of the weld with preheater gun before installation of sand mold, so as to fully remove the moisture on the rail surface.
GDII rail alignment frame