Flashcards in Basuc Weld Faults And Their Causes Deck (4)
All weld defects
Types of cracking
Hot cracks, cold cracks
External cracks- crater, longitudinal and transverse
Internal cracks- underbead cracking
Types of distortion
Longitudinal- shrinks along the length and bows inwards
Transverse- tendency for the plates in a butt joint to pull together down the length of the joint.
Methods to prevent: tacks along the length or put a wedge 12in to 18in ahead of the welding to hold the plates apart or prespacing.
Angular- the face shrinks and pulls the two pieces together
Method to fix: on a tee joint weld the other side of the joint.