Weld gauges are an everyday tool for Certified Weld Inspectors. Gauges are available for checking alignment, checking dimensions before welding, verifying weld dimensions, and for measuring the size of porosity, among other items. They can be devided into HI-LO Welding Gauge
The adjustable fillet weld gauge uses an offset arm that slides at a 45-deg angle to make fillet weld length measurements. You simply adjust the arm until it touches the toe of the vertical leg. The gauge is calibrated to 1/32 in. Four screws hold the offset arm in position for future adjustments.
The gauge also measures weld throat thickness to 1/16 in. by adjusting a pointer in position for future reference. If the weld is concave, more filler material can be added to build the weld throat up to standard Cam Type Weld Gauge. The adjustable fillet weld gauge measures both leg lengths and weld throat fillet weld thickness.
Visual Weld Acceptance Criteria Gauge
This type of gauge is used to determine if fillet welds meet U.S. Nuclear Regulatory Commission (NRC) visual weld acceptance criteria for structural weldments — Fig. 5. It easily and quickly checks the four essential measurements required for compliance with the NRC visual weld acceptance criteria: undercut depth, porosity comparison, amount of porosity per linear inch, and crown height.