The Design and Construction of Pressure Relieving Systems by Nels E. Sylvander and Donald L. Katz examines the crucial aspects of designing and implementing systems to prevent excessive internal pressure in petroleum refining equipment. This comprehensive guide compiles information from a two-year survey financed by the American Petroleum Institute. It covers the development, causes, and calculation methods related to pressure relief devices, offering detailed formulas, comparisons, and example calculations. Topics include the historical background of pressure relief devices, various causes of overpressure, determination of fluid relief capacity, calculation of relief areas for vapors and liquids, selection and mounting of relief devices, and safe disposal methods for fluids leaving relief devices. Emphasizing the necessity of uniform safety practices across the petroleum industry, the book also addresses the challenges in vent system design, fire exposure protection, and specific requirements of the liquefied petroleum gas industry.