Discontinuity and Defects
Blueprint Symbols
Groove Joint Symbols
Misc.
100

Where trapped gas forms small holes or cavities within a weld

What is porosity

100

Picture 1

What is a reference line

100

Picture 1

What is a square groove

100
A weld that forms a 90 degree angle

What is a fillet weld

200

This can occur on either legs of the weld in which the workpiece is gouged into due to high voltage or incorrect travel angle.

What is undercut

200

Picture 2

What is a tail bracket

200

Picture 2

What is a V-Groove

200
A weld that forms a gap between 2 workpieces

What is a groove weld

300

Where the molten weld metal fails to properly bond with the base metal

What is incorrect fusion

300

Picture 3

What is a staggered fillet weld

300

Picture 3

What is a bevel groove

300

Center to center spacing of intermittent welds

What is pitch

400

Where more filler metal than necessary builds up

What is excessive reinforcement

400

Picture 4

What is unequal legs

400
Picture 4

What is a flare v-groove

400

In the metric system the shear strength is measured in this measurement

What is Newtons
500

How a discontinuity can become a defect

What is does not meet industry standards
500

Picture 5

What is a groove weld
500

Picture 5

What is flare bevel groove

500

3 orthographic views found on a blueprint. 

(shows the workpiece from different angles)

What is front, top and side