saw defects
DESCRIPTION
SAW DEFECTSTRANSCRIPT
![Page 1: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/1.jpg)
Effect of Varying the Welding Current
• Arc Blow Porosity or Ropey Bead
• Burn-Through• Metal Spillage On
Rounds Fusion Zone• Pear Shaped• Penetration too deep or
too shallow• Reinforcement
Overlapped• Reinforcement too high
or too low
LOW CORRECT HIGH
![Page 2: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/2.jpg)
Effect of High Welding Voltage
• Arc Blow Porosity or Ropey Bead
• Undercutting• Penetration too deep
or too shallow • Reinforcement too
high or too low• Slag Sticking in
Deep Groove
LOW CORRECT
![Page 3: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/3.jpg)
Effect of Low Welding Voltage
• Pear Shaped• Reinforcement Narrow
& Steep-Sided
• Reinforcement Overlapped
• Reinforcement Ropey
CORRECT HIGH
![Page 4: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/4.jpg)
Effect of Varying the Welding Speed
• Low Speed
• Arc Blow Porosity or Ropey Bead
• Reinforcement Overlapped
• High Speed
• Reinforcement too high or too low
• Transverse Cracking in Multi-pass Weld
• Undercutting• Voids and Cracks
LOW CORRECT HIGH
![Page 5: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/5.jpg)
Effect of Beveling
• Burn-Through• Reinforcement Narrow
& Steep-Sided
• Reinforcement too high or too low
![Page 6: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/6.jpg)
Effect of Root Face Dimension
• Burn-Through
![Page 7: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/7.jpg)
Effect of Plate Cleanliness on Finished Welds
• Porosity and Gas Pockets
• Rust Porosity
• Transverse Cracking in Multi-pass Weld
CROSS SECTION
TOP
CLEANED CONTAMINATED
![Page 8: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/8.jpg)
Effect of Improper Fit-up in Welds Having Manual Weld
Backing
• Porosity and Gas Pockets
• Undercutting
CORRECT
INSUFFICIENT SPACING
![Page 9: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/9.jpg)
Effect of Wire Position and Reinforcement Shape in Fillet
Welds • Porosity and Gas
Pockets• Transverse Cracking
in Multi-pass Weld• Undercutting• Voids and Cracks
CORRECT
CONCAVE REINFORCEMENT
IMPROPER WELD POSITION
![Page 10: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/10.jpg)
Effect of Improper Fit-up in Double Welds
• Burn-Through• Porosity and Gas
Pockets
• Undercutting• Voids and Cracks
SQUARE GROOVE BUTT JOINT 3/8-in. Plate
900 DOUBLE- VEE GROOVE BUTT JOINT 5/8-in. Plate
CORRECT SPACING
EXCESSIVE SPACING
![Page 11: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/11.jpg)
Effect of Improper Fit-up in Square Butt Weld
• Reinforcement too high or too low
![Page 12: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/12.jpg)
Effect of Improper Fit-Up in Steel-Backed Welds
• Penetration too deep or too shallow
• Reinforcement too high or too low
• Undercutting
CORRECT SPACING
INSUFFICIENT SPACING
EXCESSIVE SPACING
GAP BETWEEN PLATES AND BACKING
![Page 13: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/13.jpg)
Effect of Proper and Improper Depth of Granular Material
• Porosity and Gas Pockets
• Reinforcement Narrow & Steep-Sided
• Reinforcement Ropey CORRECT
SHALLOW
![Page 14: Saw defects](https://reader034.vdocuments.net/reader034/viewer/2022052212/5596fd9e1a28aba3778b4639/html5/thumbnails/14.jpg)
Effect of Welding Wire Offset in Circumferential
Seam Welding
• Metal Spillage On Rounds Fusion Zone
SMALL OFFSET MEDIUM OFFSET LARGE OFFSET