The Hi-Lo Welding Gauge is a multipurpose and versatile gauge. As with many of our gauges, both standard and metric units of measurement are available directly on the gauge for dimensional verification.
With the Hi-Lo Gauge, you can measure:
* Internal misalignment after fit up
* Material thickness after fit up
* Verify 37-1/2 degree bevel angle
* Fit-up gap after fit-up
* Fillet weld leg length
* Butt weld reinforcement
We'll start with an internal misalignment measurement.
First loosen the locking screw and insert the gauge tip into the fit up gap.
Now rotate the gauge 90 degrees and slide the gauge body until it comes in contact with the outside diameter of the pipe. This verifies that the gauge is square and the reading is correct.
Next, pull down the gauge until the internal alignment stops are snug against the inside of the pipes.
Read the misalignment on the scale. This misalignment measures 3/32 of one inch.
You can use the same procedure to measure pipe wall thickness after fit up.
To measure pipe wall thickness, use the material thickness indicator and this scale.
To measure fit-up gaps less than 1/16 of an inch, insert the alignment stops into the fit up gap. If the thinner portion of the gauge does not fit, than the gap is less than 1/16 of one inch. If it partially fits in the gap, than the gap is somewhere between 1/16 and 3/32 of one inch. Finally, if the stops go thru the gap, than the gap is larger than 3/32 of one inch.
This gauge can also be used to verify a 37-1/2 degree bevel angle.
To check bevel angle, be sure to set the alignment scales to the zero position.
Not place the gauge body squarely against the pipe wall and push the gauge as far as it will go into the fit up gap. If the beveled shoulders on the gauge fits snug against the bevel on the pipe end, you have the correct 37-1/2 degree bevel common to most pipe end preps.
To measure fillet weld leg length, place one leg of the gauge on the plate and lower the other leg to the toe of the weld. Read the actual fillet weld leg length from this scale. This leg length reads 1/2 of one inch.
A similar procedure can be used to measure butt weld reinforcement. Place one leg of the gauge on the plate and lower the other leg to the top of the butt weld. Again, read the measurement from this scale.
This Hi-Lo Welding Gauge is available individually from G.A.L. Gage Company or it is included in our complete set of gauges available in our Brief Case type Large Tool Kit.