Global Leader in Pre-Insulated Piping & Leak Detection Systems Perma-Pipe Inc. is the largest manufacturer of pre-insulated piping systems for District Heating and Cooling in North America, and a Global Leader operating six (6) strategically placed manufacturing facilities worldwide. Our full product line also includes pipe-in-pipe containment systems for environmental control of hazardous fluids, subsea oil & gas pipelines and equipment, above and below ground insulated piping systems for industrial applications, liquid leak detection and location for our piping systems and stand-alone applications such as computer rooms and data centers. Perma-Pipe manufactured longest direct buried insulated pipeline integrated with skin effect heating for transferring waxy crude oil. Our state of art composite insulation pre insulated piping systems with heating are in use for temperature critical application for transferring liquid sulfur to long distance.