全印铁路有5万多公里线路,总延长约10.5万公里,其中无缝线路有1.2万公里(包括全焊接和焊接长钢轨)。在无缝线路中,焊接接头数约600万个,其中闪光焊接头150万个,铝热焊接头450万个。印度共有闪光焊工厂11个,他们的做法是在工厂内将12米短钢轨用闪光焊焊成60米长钢轨,再在线路上用铝热焊 All India Railway has more than 50,000 kilometers of lines, a total extension of about 105,000 km, of which 12,000 km of seamless lines (including all-welded and welded long rails). In the seamless line, the number of welded joints about 6000000, of which 1.5 million flash welding, aluminum welding 4.5 million. India has a total of 11 flash welding plants, their approach is to be in the factory 12 meters short rail flash welded into a 60-meter long rail, and then on the line with aluminum heat welding