How high is the recommended torch height for Pandrol Head repairs above the rail?

The recommended torch height for Pandrol Head repairs above the rail is 4-1/8 inches. This specific height is crucial because it ensures that the heat generated from the torch is optimal for melting the thermite and facilitating a proper weld. If the torch is too far away from the workpiece, the heat may dissipate too quickly, leading to inadequate melting and poor fusion of the materials. Conversely, if the torch is too close, it may cause excessive heat, leading to potential distortion or damage to the components. The 4-1/8 inch height strikes a balance that promotes effective heat distribution, leading to successful weld integrity and durability in the repair of railway components like the Pandrol Head.