ASME STP/PT-032

Description / Abstract: Buckling of cylindrical pressure vessels under axial compression and bending is normally evaluated using the axial compression stress evaluation design methods in ASME Section VIII, Division 1. In 1998 the ASME Boiler and Pressure Vessel Code Committee approved Code Case 2286, which introduced more comprehensive methods for determining allowable compressive stresses for cylinders, cones, spheres and formed heads due to external pressure, axial compression and bending. Section XII confirmed a need to develop similar such rules specific to the design of cylindrical, thin wall, trailer truck tanks. As first steps in the development of such rules, a full-scale tank buckling test was carried out, and the results of that were used to develop recommended design rules for consideration by Section XII. The results of this testing are summarized in this report. In addition, Section XII design rule proposals have been outlined and are also summarized in this report. These proposals are based on the test results, past experience with transport tanks and the design methods of Code Case 2286-2, and are presented for consideration by Standards Committee XII.