What is the method of rail butt welding?
Common Rail Rail butt joint, generally use fishtail board connection.Seamless rail bonding in the factory under the conditions of general use of air pressure welding or contact welding, the advantage of this is that there are relatively few impurities inside the solder joint, rail more stable.
The replacement of rail in CWR on the main line and no conditions for pressure welding or contact welding, the general method of aluminium heat welding rail, the disadvantage of this approach is that the solder joint residual impurities and bubbles easily, affect the service life of the rail and road safety, so in the solder joint al heat welding on general drum to install packet fishplate support as external reinforcement joint.
So, if not because of special circumstances such as fracture of the steel rail or rail reaches the service life limit requires replacement or rail damage seriously to reach or exceed the standard replacement, in addition does not recommend the use of thermit welding in rail seamless line.
