Introduced in 2009, this standard regulates the requirements for the approval of a flash-butt welding technique “by mobile welding machines at sites other than a fixed plant”. It defines a greater accuracy of the geometry after welding, higher breaking strength and fatigue strength, and conditions for the welding sequence.
For the main part of the certification, 12 welds are made on the rail profiles 60E1 or 60E2 of steel grade R260. Then, the quality of these welds is tested by an accredited weld testing institute.
To ensure reproducibility, the welding parameters are selected one time and must not be changed.
The certification procedure includes the following tests:
For each welding head a separate certificate is required.