User Manual

PrimeProbe2 User Manual

Measuring the Internal Diameter of the Pipe

After successfully attaching the 1-inch (25-mm) boss to the pipe, it is

critical to take an accurate measurement of the internal diameter of the

pipe (pipe ID). This can be done using one of the following:

 Pipe thickness gauge

 Tape measure

 Gauging rod

Pipe Thickness Gauge

Use an Ultrasonic Pipe Thickness Gauge to measure the ID of the pipe in

the following way:

1. Measure the circumference of the pipe using a measuring tape.

2. Divide the measured circumference by ð (pi) to obtain the outside

diameter of the pipe.

3. Use the ultrasonic pipe thickness gauge to measure the thickness of

the pipe wall.

4. Multiply the pipe thickness by 2 and subtract the result from the

outside diameter.

Gauging Rod

Use a gauging rod to measure the pipe ID in the following way:

1. With the valve closed, connect the gauging rod to the ball valve.

Make sure the measuring arm is aligned correctly with the pipe

(see step 1 in the following figure).

2. Open the valve completely, and lower the gauging rod until it

touches the bottom of the pipe. With the gauging rod touching the

bottom of the pipe, rotate the gauging rod 180 degrees and then

lock-down the upper measuring-lip (see step 2).

3. Withdraw the gauging rod until it touches the top of the pipe wall.

With the gauging rod touching the top of the pipe wall, lock-down

the lower measuring lip. The distance between the two knife-edges

of the measuring lips is the internal diameter of the pipe (see step

3).

4. Rotate the gauging rod 180-degrees, and withdraw the gauging rod

the rest of the distance (i.e., clearing the valve). Close the ball

valve completely. Remove the gauging rod (see step 4).