Lateral refers to the
direction perpendicular to the centerline of the expansion joint
(in any plane). Other terms for this deflection are PARALLEL
OFFSET and TRANSVERSE. This movement occurs with both of the ends
of the expansion joint remaining parallel to each other, with
their centerlines being displaced, or no longer coincident.
When
analyzing the deflections in a piping system, it is not uncommon
to find that different lateral deflections can occur in more than
one plane. Since an expansion joint is round, these various
deflections must be resolved into a single resultant lateral
deflection, in order for the bellows to be properly selected in
terms of the rated LATERAL DEFLECTION shown in this catalog.
The
magnitude of the resultant LATERAL DEFLECTION is the square root
of the sum of the squares of the individual deflections. The
planes of the various deflections must also be clearly understood
if the expansion joint is to contain structural components such
as hinges, which may inhibit movements in certain directions, and
if the individual deflections can occur separately during the
life of the expansion joint.
6" dia. Universal Expansion Joints for a Power Generation Plant
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