Page 316 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 87 : Inspect dimensional weldments using
weld gauge

Objectives

At the end of this exercise, you will be able to:
• height of flat weld
• height of fillet weld bead
• thickness of fillet weld
• bevel angle of weldment
• vertical misalignment.

Job Sequence

• There are several types of gauges used in measuring welds and welding defects including but not limited to
porosity, undercut, under fill and concavity.
• The two most used kinds are the Standard Fillet Weld Gauge and AWS Gauge Automatic Weld Size Gauge.
• This article will show you how to use both gauges properly.
• The Fillet Weld Gauge is one of the easiest gauges to use and is helpful to check welds for fillet size and
concavity.
• We always want our welds to be from flat to slightly convex.
• The Fillet Weld Gauge will let you know if your weld is concave.
• This type of gauge will typically include 7 or more pieces.
• For example, here are some instructions on how to use a 1/2″ fillet weld:
• Simply slide the gauge and have the top end rest against the vertical piece.
• This end should be exactly at the top edge of the weld to be a 1/2″ fillet. If you have space between the gauge
and the toe of the weld, then the weld is undersized.
• The bottom edge of the fillet has more room, which allows for a larger leg size.
• This is particularly useful with big fillet welds where gravity tends to make the bottom leg larger.
• The vertical line will show where the bottom toe should be.
Wear protective clothing.

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