A company which operates worldwide in the field of petroleum and petrochemicals finds it necessary to establish practices for pressure vessel design which are uniform and have a sound technical basis. This paper outlines certain design practices of the authors’ company related to critical problems. These problems are brittle of vessels which operate at atmospheric and lower temperatures, efficient utilization of materials for vessels in intermediate temperature service, and the validity of design stresses for vessels which operate at high temperature. The paper emphasizes the need for better high-temperature stress data and for a confirmed method of determining service life expenditure for vessels operating under creep conditions.

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