Torch stand-off distance
The cutting torch standoff is the constant distance between the torch and the workpiece surface. It prevents flashbacks and ensures stable flow conditions.
Physicochemical Mechanism of Action
The cutting torch distance affects the gas flow and temperature profile in the welding zone. Too large a distance can lead to uneven heating and flashbacks, while too small a distance results in excessive burning and possible damage to the workpiece.
Metallurgical Relevance & Risks in Welding
An improper cutting torch distance can cause the following problems: flashbacks that can damage the workpiece; uneven heating, which leads to stresses and cracks; or excessive burning, which can damage the cutting tool or the workpiece. A correct distance ensures a stable flow and even heating, which improves weld quality.
Shop Practice & Procedures
The typical cutting torch distance is 20 to 30 mm. This value can be adjusted depending on the tool and workpiece, but it is important to keep the distance constant. For unusual workpieces or flow issues, check the distance and adjust if needed.