PU foam pipes and/or bends coating is added on the external surface of pipelines when thermal insulation is required. The fluid flowing inside the line maintains its viscosity thanks to superior insulation properties and low thermal conductivity.
The coating reduce heat loss and prevent hydrate formation in subsea gas pipelines. The foam is injected between the pipe and an HDPE (high density Polyethylene) jacket, according to EN 12 201, the jacket is custom cut in case of bends.
V.I.P. Pesaro is one of the few companies able to offer the PU foam coating on pipes as well as on custom pieces.
The coating is a multilayer composed of a primer fusion bonded epoxy (FBE) followed by a layer of polyurethane foam and an outer casing of polyethylene which provides resistance to high temperatures, thermal insulation and long-lasting protection. Especially recommended for district heating pipes, this pre-insulated bonded pipe system for directly buried hot water networks is designed for a constant flow of hot water at 120/140°C of temperature.
District heating pipes
Pre-insulated bonded pipe systems for directly buried hot water networks. It is a three layers pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene. The polyurethane foam has a very low thermal conductivity, which is due to the porous structure and the low conducting gases trapped in the cells of the foam.
Thanks to the level of thermal conductivity and its rate of degradation can be interpreted as an economically and environmentally cost or gain. This coating is mainly used for hot fluid transportation from thermal power stations to factories as well as residential units, o!en are widely used for the transport of oil and chemicals and for district heating and cooling systems.
About the foam layer:
. Foam density: 80Kg/m^3 ASTM D1622
. Foam initial thermal conductivity at 23°C: 24 mW/mK UNI7891
. Foam compression resistance: 300KPa UNI6350