1. What are essential weld procedure requirements?
Qualified WPS for each material combination
Proper preheat/interpass temperature control
Approved filler metals matching base materials
Post-weld heat treatment when required
NDT examination requirements
2. How to prevent weld-related failures?
Complete joint penetration welds
Proper weld geometry and reinforcement
Avoid undercut and other defects
Stress relief for thick sections
Weld location away from high stress areas
3. What are challenges with dissimilar metal welds?
Different thermal expansion coefficients
Carbon migration issues
Weld metal dilution concerns
Special filler metal selection
More frequent inspection needed
4. What are field repair welding best practices?
Proper joint preparation and cleaning
Environmental controls (wind, rain)
Weld sequence to minimize distortion
In-process quality verification
Post-weld inspection
5. How does orbital welding improve quality?
Consistent, automated parameter control
Excellent repeatability
Reduced human factors
Better documentation
Higher productivity
