Pre-insulated single steel pipes and fittings

Pre-insulated single steel pipes and fittings are insulated with polyurethane foam (PUR) and encased in a high-density polyethylene (HDPE) outer layer. The pipes feature a rigid connection system, ensuring a seamless bond between the steel pipe, PUR-foam, and HDPE casing. Available in lengths of 6, 12, and 16 meters, these pipes come in various dimensions ranging from DN 20 to 800 across insulation series 1, 2, and 3. Casing diameters range from 90 – 1000 mm. The representative pipe described in this EPD has DN 32 and a casing diameter of 110 mm. The R-value of the product is CI, which stands for civil engineering applications. The R-value is stated in accordance with EN 16783:2017. Primarily used for district heating fluid transportation, the pre-insulated single steel pipes and fittings are installed underground. However, their HDPE casing is infused with carbon black to enhance durability against sunlight, making them suitable for above ground applications when necessary. Set sources steel pipes exclusively from ISO 9001 certified suppliers, ensuring high quality. On request, they provide an inspection certificate to verify material standards. The PUR-foam used in these pipes has excellent insulation properties (2.60 E-02 W/m-K), high-pressure resistance and longevity. The PUR-foam is cyclopentane-blown and has zero effect on the ozone layer. This foam also plays a crucial role in firmly bonding the steel pipes to the plastic casing. The PE casing is robust, offering substantial resistance to chemical degradation and sunlight, making it an ideal protective layer for the PUR foam. The pipes are manufactured seamlessly, and the polyethylene surface is corona treated to maximize adhesion to the PUR foam.