Figure 9-56.—Unions/threaded pipe connectors.
Figure 9-57.-Flared-tube fittings.
repairs and alterations. Unions are available in
many different materials and designs to withstand
a wide range of pressures and temperatures.
Figure 9-56 shows some commonly used types of
unions/threaded pipe connectors. The union is
most commonly used for joining piping up to 2
inches in size.
Flared Fittings
Flared fittings are commonly used in tubing
lines. These fittings provide safe, strong,
dependable connections without the necessity of
threading, welding, or soldering the tubing. Flared
fittings are made of steel, aluminum alloy, or
bronze. Do not mix materials when using these
fittings. For example, for steel tubing use only
steel fittings and for copper or brass tubing use
only bronze fittings, Figure 9-57 shows the most
common types of flared fittings.
Figure 9-58.-Double-male flareless fitting.
Flareless Fittings
Flareless fittings
suitable for use in
(figs. 9-58 and 9-59) are
hydraulic service and air
Figure 9-59.—Typical flareless fitting.
9-39
