Pipe preheating temperature?
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When preheating pipes, why can the preheating temperature be reduced appropriately when TIG welding is used for the root pass? What is the reason for this?
Thermal pipelines reduce the impact of temperature deformation stresses caused by sudden heating on pipeline systems, and this impact can be significant in larger systems.
If you don’t want to get scolded by the welder, don’t lower the standards.
The heat input in TIG welding is much lower than that in electric welding; as a result, the welding stress is also significantly reduced. This allows for a lower preheating temperature to be used. Additionally, since the TIG welding torch is positioned relatively close to the workpiece compared to electric welding, it also reduces the physical strain on the welder