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Technical Brief

Optimization and Standardization of Flanged and Flued Expansion Joint Design

[+] Author and Article Information
Kamlesh M. Chikhaliya

Faculty of Engineering and Technology,
Ganpat University,
Mahesana-Gozaria Highway,
Gujarat 384012, India
e-mail: ckm28482@gmail.com

Bhaveshkumar P. Patel

Mechanical Engineering Department,
U.V. Patel College of Engineering,
Ganpat University,
Mahesana-Gozaria Highway,
Gujarat 384012, India
e-mail: bpp01@ganpatuniversity.ac.in

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received December 11, 2018; final manuscript received February 25, 2019; published online March 21, 2019. Assoc. Editor: Kiminobu Hojo.

J. Pressure Vessel Technol 141(3), 034501 (Mar 21, 2019) (23 pages) Paper No: PVT-18-1274; doi: 10.1115/1.4043012 History: Received December 11, 2018; Revised February 25, 2019

Flanged and flued type expansion joint (thick wall expansion bellow) used as an integral part of many shell and tube heat exchanger where process conditions produce differential expansion between shell and tubes. It provides flexibility for thermal expansion and also functions as a pressure retaining part. Design of expansion joints is usually based on trial and error method in which initial geometry must be assumed, and accordingly maximum stresses and spring rate are be calculated. Inadequate selection of geometry leads to higher tubesheet and bellow thickness, which increases cost of equipment. This paper presents standardization and optimum design approach of flange and flued expansion bellow fulfilling ASME VIII-1 and TEMA standard requirement. Methodology to define expansion bellow geometry is developed, and geometry dimensions are tabulated for expansion bellow diameter from 300 to 2000 mm and thickness from 6 to 30 mm. Each defined geometry is analyzed using finite element method, and maximum von Mises stresses are calculated for bellow axial displacement from 0.5 to 1.5 mm and internal pressure from 0.1 to 6.5 MPa. Spring rate is also calculated for each defined geometry for consideration in tubesheet calculation. Accordingly, optimum design methodology is developed, tested, and compared with existing design. Results depicted that proposed standardization approach and design methodology will optimize expansion bellow and tubesheet thickness and will also save considerable time in finalization of heat exchanger design.

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References

Thulukkanam, K. , 2013, Heat Exchanger Design Handbook, 2nd ed., CRC Press, Boca Raton, FL, pp. 644–652.
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GB16749, 1997, “National Standard for the People's Republic of China, Bellows, Expansion Joint for Pressure Vessel,” China, Chap. No. 1.0.
EN-13445, 2013, “Standard for Unfired Pressure Vessels,” Berlin, Chap. 14.

Figures

Grahic Jump Location
Fig. 1

Basic geometry of flanged and flued expansion joint

Grahic Jump Location
Fig. 2

Typical meshing plot

Grahic Jump Location
Fig. 3

Typical von Mises stress plot for stress determination

Grahic Jump Location
Fig. 4

Typical displacement plot for spring rate determination

Tables

Errata

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