9: Non-destructive Examination

c. Fillet weld gauge—offers a quick and precise means of measuring the
more commonly used fillet weld sizes. The types of fillet weld gauges
include:
1. Adjustable fillet weld gauge (see Figure 15)—measures weld sizes for fitups
with 45° members and welds with unequal weld leg lengths.
2. Skew-T fillet weld gauge (see Figure 16)—measures the angle of the
vertical member.
3. The weld fillet gauge (see Figure 17)—a quick go/no-go gauge used to
measure the fillet weld leg length. Gauges normally come in sets with weld
leg sizes from 1/8 in. (3 mm) to 1 in. (25.4 mm). (Figure 18) shows a weld
fillet gauge being used to determine if the crown has acceptable concavity
or convexity.