IEEE 622:1979

New IEEE Standard - Superseded.


IEEE Std 622-1979 provides recommended practices for designing and installing electric pipe heating systems in nuclear power generating stations. These electric pipe heating systems are applied, both for critical process temperature control and for process temperature control on mechanical piping systems that carry borated water, caustic soda and other solutions. Electric pipe heating systems are also applied on water piping systems to prevent them from freezing in cold weather. The recommendations include identification of requirements, heater design considerations, power systems design considerations, temperature control considerations, alarm considerations, finished drawings and documents, installation of materials, startup testing, temperature tests, and maintenance of electric pipe heating systems.
The purpose of this document is to provide recommendations that may be used in the design, installation, and maintenance of electric pipe heating systems as applied to mechanical piping systems. These recommendations are intended to ensure that the piping systems will be maintained at specified operating temperatures, which in turn will ensure that the piping systems' fluids will be available not only during station operation, but also during normal shutdown.