DR-17 is an engineering specification created by the American Society of Mechanical Engineers (ASME) for service piping systems. This specification covers the requirements for the design, fabrication, inspection, testing, installation, and maintenance of piping systems used for fluid power and process piping applications. This specification applies to all piping systems regardless of size, material, design pressure, or temperature. It defines the rules for materials selection, service requirements, fabrication, stress analysis, leak testing, and inspection for the design, fabrication, and installation of piping systems. DR-17 also provides guidance for inspections, maintenance, and other operational issues related to piping systems. In addition, DR-17 covers testing requirements and provides specific requirements for allowable variations in a pipe system's fabrication and installation.