1. Direct Measurement Verification: Use an infrared thermometer to directly measure the temperature of the heating die surface. If the measured temperature exceeds 270℃, it is considered overheating and exceeds the safe range for PPR welding.
2. Appearance Judgment: A properly welded flange is uniformly white. If the flange of the pipe joint turns yellow, black, or even caramel-colored after welding, it is a typical sign of overheating.
3. Reverse Inference Based on Welding Results: If excessive PPR material melts during welding, adheres heavily to the die and is difficult to clean, and the welded pipe shows obvious necking and a significant decrease in water flow, after ruling out operational errors, it can be generally determined that the equipment temperature is too high.
