Rothenberger ROWELD E Series - Malfunction Analysis and Solutions; Joint Quality Problem Analysis

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6. Malfunctions Analyses and Solutions
6.1 Frequent joints quality problems analyze:
 Visually check：round bead, good joint
 Narrow and fall bead. Too high pressure while
welding
 Too small bead. Pressure is not enough while
welding
◆ There is a ditch between the welding surfaces.
Temperature is not enough or change-over time is too
long while welding.
◆ High & low bead. Different heating time or fusion
temperature causes that.
◆ Misalignment. Welding under the condition that the
misalignment exceeds 10% of pipe wall thickness
while align the two ends.