Allowable Shape Deviation in a Pressurized Cylinder

[+] Author and Article Information
L. S. Ong

Nanyang Technological University, School of Mechanical and Production Engineering, Singapore 2263, Republic of Singapore

J. Pressure Vessel Technol 116(3), 274-277 (Aug 01, 1994) (4 pages) doi:10.1115/1.2929587 History: Received September 02, 1993; Revised February 16, 1994; Online June 17, 2008


Presence of initial shape imperfection causes additional bending stresses to be developed in a pressurized cylinder. Although the bending stress will initially increase with pressure, it will finally settle down to a certain value. This article derives the maximum bending stress associated with the geometric shape imperfection. It also discusses the implication of this additional bending stress on the design stress and allowable shape tolerance. Finally, it is concluded that a 1-percent diametral deviation, as commonly specified by most design codes, is adequate and sound for the internally pressurized cylinder.

Copyright © 1994 by The American Society of Mechanical Engineers
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