First production of NIRON PP-RCT pre-insulated pipes 6" SDR11 at NUPI plant in Early Branch, South Carolina. Pre-insulated pipes are ideally suitable for application in areas where the heat loss reduction is essential. This product range was specifically designed for networks for the distribution or adduction of hot fluids. The reliability, ease of installation and relevant physical-mechanical properties of the materials used allow installers to overcome many problems when installing heat distribution and conditioning systems. The excellent characteristics of the material allow to obtain high levels of thermal insulation with significantly reduced insulation layers if compared to those that would be required if other materials were to be used. The system is particularly suitable to be used for district heating/cooling, transport of hot water and drinking water, swimming pools and spas, cooling systems. Its main advantages are ease of installation and reduced installation time, excellent thermal insulation, low weight, high resistance to corrosion, high durability, resistance to abrasion and to stray currents.