Preheating – How, When and Why

Heating the base metal to a specific desired temperature before welding is called as preheating. The temperature at which the base metal is heated is called as the preheat temperature. Preheat temperature can be determined by the applicable code. Please see table 1 to know how to find the preheat temperature in the respective code: In absence of code, the following factors shall be considered for determining the preheat temperature;….

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