49
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.
Summary of Contents for ROWELD E Series
Page 1: ...1 ...
Page 22: ...22 7 Electrical draw diagram and Hydraulic schematic diagram 7 1 Electrical draw diagram ...
Page 23: ...23 7 2 Hydraulic schematic diagram ...
Page 53: ...53 7 Electrical draw diagram and Hydraulic schematic diagram 7 1 Electrical draw diagram ...