Figure 3-59. - How to read measurements of fittings.

of pipe. Threaded galvanized or black iron pipe is measured like copper pipe and tubing, as shown in figure 3-42.

CUTTING, REAMING, AND THREADING. - Galvanized pipe can be cut, reamed, and threaded by hand or with a power-operated machine. This discussion is limited to cutting, reaming, and threading pipe with a power-operated machine. A power-operated machine saves time, especially when a large volume of material has to be cut. A typical electrically operated pipe machine (drive) is shown in figure 3-60.

In cutting galvanized pipe with the machine shown in the figure, insert the pipe into the machine. Then

Figure 3-60. - Electrically operated pipe drive machine.