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| » Advantages of Metal Expansion ::.. |
The advantage of METAL Expansion Joints against FABRIC or NON-METALLIC Expansion Joints are many; main being as under.
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Light weight |
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Suitable for High and Very High Pressure & Temperature |
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Stability in Connection |
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Wear and Rupture Resistant |
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Non combustible |
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Fully Liquid and Gas tight |
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High Cycle Life |
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Easy to Clean |
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Ends can be welded |
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Bellows Expansion joints are essentially used in pipelines and ducting to compensate.
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Vibration Isolation |
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Thermal expansion of the pipeline |
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Misalignment in piping |
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Relieve load on equipment |
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Dismantling of Valve or Tongue and Groove flanges |
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There are main two different types of Bellows :
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Circular : |
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50 NB to 7000 NB any size in single or multi ply construction.
‘U’ – Profile, Semi-Toroidal, Rein forced and Un-Reinforced type. |
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Rectangular : |
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 Any size. ‘U’ - Profile or ‘V’ Profile - Round Corner / Single Miter / Double / Miter/ Camera Corner / Oval Bellows.
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| » Axial Expansion Joint ::.. |
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Axial Expansion Joint the simplest form of expansion joint. A flexible element either with flange end or Butt Weld End to absorb any combination of three basic movements. i.e. Axial movement, Lateral deflection and Angular rotation along the axis of the pipe line. |
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| » Universal Expansion Bellows ::.. |
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A universal Expansion joint is one containing two bellows joined with a spool piece for the purpose of absorbing any combination of the three basic movements: Axial movement, Lateral deflection and Angular rotation. |
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| » Double Expansion Joint ::.. |
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Absorption of high thermal expansion or contraction of straight pipe runs when the joint can be located near the center of the run, and proper anchors and guides must be provided. Each Bellows act as a single expansion joint. |
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| » Tied Lateral Bellows ::.. |
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The Bellow assembly Consist of two Tie Rod with spherical washer arrangement to absorb Pressure Thrust forces produced under pressure. |
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| » Hinged Expansion Joint ::.. |
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A hinged bellows, either axial or universal type, designed to absorb angular rotation in one plane only by the use of a pair of pins through hinge plates attached to the expansion bellows. Hinged Expansion Bellows should be used in sets of 2 or 3 to function properly. |
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| » FCCU Expansion Joint ::.. |
 Expansion Joints used in FCCU service, know as Cat-Cracker Expansion Joint are some of the most critical and complex types of expansion joints manufactured. These expansion joints are exposed to high temperatures (1500 deg F), high pressures, large movement conditions, and aggressive media.
Great aattention and expertise is required in designing the bellows and hardware to ensure that the units perform well in service. Failure of FCCU expansion joints during operation can be extremely hazardous to personnel and very expensive to the user. There are various types of expansion joints used in FCCU applications: Tied Universals, Hinge, Gimbal, and Pressure Balanced. All of these fall into 3 major categories: Cold Wall, Hot Wall, and Unlined FCCU joints. The bellows membrane design for all three categories is basically the same, although the bellows membrane can be single ply, multi-ply, redundant ply, and reinforced.
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| » Gimbal Expansion Joint ::.. |
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Gimbal Bellows which can permit angular rotation in any plane, consist of two pair of hinges affixed to a common floating gimbal ring. |
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| » Single Miter Rectangular Expansion Joint ::.. |
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Rectangular joints are most commonly used in low pressure ducting to absorb thermal growth, addition of flexibility in short runs, and as vibration absorbers adjacent to fans, blowers and other mechanical equipment. In general, they are used in the same manner as the corresponding circular joint. Application Flue gases & Dust made for M/s Acc Cement Chaibasa Plant.
Size : 3250mm x 2000mm. |
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| » Round Corner Rectangular Expansion Joint ::.. |
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Application Turbine exhaust made for M/s IOCL Panipat throught M/s BHEL under third party inspection by M/s Lloyd's Register Asia.
Size : 1600mm x 500mm x 1000mm long.
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| » Oval Expansion Joint ::.. |
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Application Turbine exhaust made for M/s HNL Kottayam throught M/s BHEL under third part inspection by M/s Lloyd's Register Asia.
Size : 1160mm x 800mm x 1000mm long.
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