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Elbow 48' EIINw Tee<br />
Cram S~oet EIImw lateral<br />
Figure 6-2. Forged steel fittings. (Courtesy of Jaqua-McKee, Inc.)<br />
Figure 6-2 shows the most commonly used fittings in<br />
ANSI systems, the forged steel screwed (and socket-<br />
weld) fittings. These fittings are used for steam, water,<br />
oil, gas, and air. They are available in 2,000, 3,000 and<br />
6,000-1b classes, in many types of alloys including stain-<br />
less steels. Figure 6-3 shows additional forged steel fit-<br />
tings. S<strong>to</strong>re fittings by size and rating.<br />
Pipe nipples are s<strong>to</strong>cked in various lengths in black or<br />
galvanized pipe, and in schedules <strong>to</strong> match the pipe be-<br />
ing used. They are also made <strong>to</strong> the length required for<br />
fit-up by pipefitters using pipe machines. Figure 6-4 de-<br />
picts typical pipe nipples. One of the nipples is referred<br />
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