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SPECIAL SECTION PAPERS: Design and Analysis

A Proposed General Method of Stress Analysis for Tubesheet of Heat Exchanger

[+] Author and Article Information
Hongsong Zhu

Bayer Technology and Engineering
(Shanghai) Co., Ltd.,
Shanghai 200233, China

Jinguo Zhai

Shanghai Research Institute
of Chemical Industry,
Shanghai 200062, China

Haifeng Wang

College of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211876, China

Yixiang Zheng

Special Equipment Safety Supervision,
Inspection Institute of Jiangsu Province,
Nanjing 210036, China

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received June 27, 2015; final manuscript received April 28, 2016; published online July 22, 2016. Assoc. Editor: Albert E. Segall.

J. Pressure Vessel Technol 138(6), 061201 (Jul 22, 2016) (20 pages) Paper No: PVT-15-1135; doi: 10.1115/1.4033530 History: Received June 27, 2015; Revised April 28, 2016

The stress analysis method for fixed tubesheet (TS) heat exchangers (HEX) in pressure vessel codes such as ASME VIII-1, EN13445, and GB151 all assume a geometric and loading plane of symmetry at the midway between the two TSs so that only half of the unit or one TS is need to be considered. In this study, the midplane symmetry assumption is discarded. More common situations are considered such as unequal TS thickness, different edge conditions, pressure drop, and dead weight on two TSs. Based on the classical thin plate and shell theoretical solution, an analytical method of stress analysis for TS is presented. The proposed method is suitable for different types of HEX due to fewer assumptions employed in this study. Analysis shows that floating and U-tube HEX are the two special cases of the proposed method. Theoretical comparison shows that ASME method can be obtained from the special case of the simplified mechanical model of the proposed method. Typical geometries and loading are considered, and the proposed method is used to check the adequacy of design. Predictions are compared with the results obtained from axisymmetric finite element analysis (FEA) and current ASME method. Comparison results indicate that predictions given by this paper agree well with FEA while ASME results are not correct or not accurate.

Copyright © 2016 by ASME
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References

Figures

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Fig. 1

Vertically mounted fixed TS HEX

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Fig. 2

Sketch of different types of floating TS

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Fig. 3

Shell gasketed with TS

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Fig. 5

Comparison of TS radial membrane and bending stress for fixed TS HEX

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Fig. 6

Comparison of TS radial stress for fixed TS HEX

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Fig. 7

Comparison of tube axial stress for fixed TS HEX

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Fig. 15

Comparison of TS radial stress for U-tube HEX

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Fig. 12

Comparison of TS radial stress for Internally Sealed Floating TS HEX

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Fig. 13

Comparison of TS radial stress for Internally Sealed Floating TS HEX

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Fig. 14

Comparison of tube axial stress for Internally Sealed Floating TS HEX

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Fig. 8

Comparison of TS radial stress for immersed floating TS HEX

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Fig. 9

Comparison of tube axial stress for immersed floating TS HEX

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Fig. 10

Comparison of TS radial stress for Externally Sealed Floating TS HEX

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Fig. 11

Comparison of tube axial stress for Externally Sealed Floating TS HEX

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Fig. 16

Comparison of TS radial stress not considering gravity

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Fig. 17

Comparison of tube axial stress not considering gravity

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Fig. 18

Comparison of TS radial stress considering gravity

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Fig. 19

Comparison of tube axial stress considering gravity

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