The welding of 60R rails will be done by. Alumino- Thermic welding techniques with short pre-heat process have been standardised for 75R, 90R and higher rail sections and not standardised for 60R rails. welding.ġ.5 Conventional AT welding process which utilised green sand mould has been banned on Indian Railways.
![zigzag plant etching zigzag plant etching](https://i.etsystatic.com/11442503/r/il/cbf027/2725898227/il_794xN.2725898227_kb2h.jpg)
Normally new single 'rails shall not be welded by A.T. welding is required to be done to convert flash butt welded panels into long panels and for repair of fracture. Oxy-LPG & Compressed Air petrol fuel mixture are being developed as these techniques take less time for pre-heating the rail ends to desired temperature resulting in saving of block time with improved quality of joint.ġ.4 A. Short pre-heating is mostly being done by Air-petrol fuel mixture.
![zigzag plant etching zigzag plant etching](https://i.etsystatic.com/5179135/r/il/77c7ae/385374424/il_1140xN.385374424_54np.jpg)
![zigzag plant etching zigzag plant etching](https://i.etsystatic.com/5988833/r/il/ae4e95/1194707275/il_1140xN.1194707275_sbup.jpg)
IRS T-19-1994.ġ.3 On Indian Railways Alumino-Thermic welding with short pre-heating process by using high Silica sand mould (C0 2 dried) is being followed at present for welding rails of different chemistry and sections.
#Zigzag plant etching serial#
Same considerations also led to revision of Indian Railway Standared Specification for fusion welding of rails by alumino-thermic process which has now been revised and issued under the serial No. MANUAL FOR FUSION WELDING OF RAILS BY THE ALUMINO-THERMIC PROCESSġ.1 This manual supercedes "Manual for welding of rail joints by the alumino-thermic process, April, 1987"ġ.2 There have been many technological improvements in the ,process of Alumino-Thermic welding which have necessitated revision of Manual issued in April- 1987.