Inspection Practices for Pressure Vessels Supplements API 510 by providing pressure vessel inspectors with information that can improve skills and increase basic knowledge of inspection practices. It describes inspec tion practices for the various types of pressure vessels (e.g. towers, exchanger, air - cooled heat exchanger, reactors, and spheres) used in the hydrocarb on and chemical process industry. This recommended practice addresses vessel components, inspection planning processes, inspection intervals, me thods of inspection and assessment, methods of repair, records, and reports