During winter problems with frost in fresh water pipes, waste water pipes, cooling water pipes, supply pipes and sprinkler systems can be avoided by heating the pipes internally or externally. The systems provide either a  self-limiting system. 

self-regulating trace heating cables are suitable for freeze protection of large pipes/vessels with high heat loss, and for process temperature maintenance applications without steam-cleaning requirements, up to 500°F/260°C and intermittent exposure to 610 °F/320°C. The fluoropolymer outer jacket (-CT) provides high chemical resistance against aggressive organics and corrosives.There are suitable for hazardous and non-hazardous areas.