Non-metallic
expansion joints have been used in place of the traditional all-metal expansion
joints to solve problems caused by the thermal and mechanical stresses
generated in complex systems. Even though the power generation industry
is a main user of rubber expansion joints, the product has found acceptance
in many other industries.
Three reasons
to use rubber expansion joints:
1. To prevent
stresses due to expansion and contraction
2. To insulate
against the transfer of noise
3. To compensate
for misalignment
Features:
-
Large movement
potential: the non-metallic expansion joint offers multi-plane movements
in a shorter face-to-face dimension.
-
Corrosion resistance:
the ability of various rubbers and plastics to stand up to corrosive chemicals
can extend the life of an expansion joint.
-
Sound and vibration
elimination: the outstanding vibration and sound attenuation characteristics
of elastomers help prevent premature system degradation.
-
Ability to stand
up to high temperatures: with the use of special materials, non-metallic
expansion joints can withstand over 1000°F operating temperatures.
Benefits:
-
Lower systems design
costs
-
Low material costs
-
No gaskets required
-
Lower replacement
costs
Rubber expansion
joints also effectively confront these problems:
-
Vibration
-
Noise
-
Shock
-
Corrosion
-
Electrolysis
-
Induced Forces
Warning:
Expansion joints may operate
in pipelines or equipment carrying fluids and/or gases at elevated temperatures
and pressures. Precaution should be taken to insure proper installation
and regular inspection. Care is required to protect personnel in the event
of leakage or splash.
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