Report no.2: evaluation of design margins for ASME code section VIII, division 1 and 2 -- phase 2 studies

摘要

The Phase 1 Report on Evaluation of Design Margins for ASME Code Section VIII, Division 1, May 1996, provided justification for decreasing the design margin on ultimate tensile strength from 4 to 3.5.{sup}11 That report endorsed the reduction inthe design margin based on the improvements in the Code rules over the last 40-50 years and recommended further review of certain other factors to assure consistency of the existing rules with the reduction in the design margin from 4 to 3.5 for Division1.The Phase 2 Report includes the Phase 1 follow-up studies, evaluation of the design margins in ASME Section VIII, Division 2, and a comparison of the Section VIII, Division 1 and Division 2 Code requirements with those in several European pressure vesselcodes and standards which use lower design margins than ASME Section VIII. These include the British Standard 5500,{sup}5 the German Pressure Vessel Code (AD-Merkblatt Code),{sup}6 the Netherlands Rules for Pressure Vessels (Stoomwezen Code){sup}7 and the CEN/TC54 Draft Standard for Unfired Pressure Vessels.8