This report compares codes and standards for the design of piping systems in power plants, from the following countries: United States, United Kingdom, Canada, France, Germany, Holland, Norway and Sweden.The comparison applies to fossil and non-safety nuclear power plant piping standards (the equivalent of todays ASME B31/1) and, where they exist, to nuclear safety class power plant piping standards (the equivalent of todays ASME Boiler and Pressure Vessel Code Section III).