Design of Saddle Support for Horizontal Pressure Vessel

This paper presents the design analysis of saddle
support of a horizontal pressure vessel. Since saddle have the vital
role to support the pressure vessel and to maintain its stability, it
should be designed in such a way that it can afford the vessel load
and internal pressure of the vessel due to liquid contained in the
vessel. A model of horizontal pressure vessel and saddle support is
created in ANSYS. Stresses are calculated using mathematical
approach and ANSYS software. The analysis reveals the zone of high
localized stress at the junction part of the pressure vessel and saddle
support due to operating conditions. The results obtained by both the
methods are compared with allowable stress value for safe designing.

• Vinod Kumar
• Navin Kumar
• Surjit Angra
• Prince Sharma

• ANSYS
• Pressure Vessel
• Saddle
• Support.

[1] “ASME Boiler and Pressure Vessel Code,” Section VIII, Pressure
Vessels Division, 2. ED2010.
[2] L.S.Ong and G.Lu, “Optimal support radius of loose-fitting saddle,”
International Journal of Pressure Vessels & Piping, vol.54, pp. 465-479,
1993.
[3] N.El-Abbasi, S.A. Maguid and A. Czekanski “Three dimensional finite
element Analysis of saddle supported pressure vessel,” International
journal of mechanical sciences, vol. 43, pp. 1229-1242, 2001.
[4] A.Th.Diamantoudis and Th. Kermanidis, “Design by analysis versus
design by formula of high strength steel pressure vessel a comparative
study,” international Journal of Pressure Vessels & Piping, vol.82, pp.
43-50, 2005.
[5] Zick L.P, “Stresses in large horizontal cylindrical Pressure vessel on two
saddle supports,” The welding Research Supplement, pp.959-970, 1971.
[6] Dennis. R. Moss, Pressure Vessel Design Manual Third edition, 2004,
pp. 166-184.
[7] D. H. Nash, W. M. Banks and F. Bernaudon, “Finite Element Modeling
of Sling-Supported Pressure Vessels,” Thin-Walled Structures, Vol. 30,
nos. 1–4, pp. 95–110, 1998.
[8] J. Spence, D.H. Nash, “Milestones in pressure vessel technology,”
International Journal of Pressure Vessels and Piping, vol.81, pp. 89–
118, 2004.
[9] Ong Lin Seng, “Analysis of Twin-Saddle-Supported Vessel Subjected to
Non-Symmetric Loadings,” International Journal of Pressure Vessels
and Piping, vol. 35, pp. 423-437, 1988.
[10] L. S. Ong & G. Lu, “Stress reduction factor associated with saddle
support with extended top plate,” international journal of pressure
Vessel & Piping, vol. 62, pp. 205-208, 1995.
[11] David H Nash and Alwyn S Tooth, “The influence of the flexibility of
the dished end on twin saddle supported pressure vessels,” the ASME
eighth international conference on pressure vessel technology,
Montreal, Quebec, Canada, pp. 475-480, 1996.
[12] ANSYS 14.0 Release.