ISOPAM pipes DN100 to 600 with STANDARD socket (Equiped with Foam spacer and Collar)

• DN: nominal diameter

• Lu: laying length, in m

• Class: pressure class according to EN 545 and ISO 2531

• e: nominal thickness according to ISO 2531, in mm

• ØDE: external nominal diameter of the barrel according to EN 545 and ISO 2531, in mm

• ØDI: internal nominal diameter of the socket, in mm

• P: nominal depth of the socket, in mm

• ØB: nominal diameter of the socket, in mm

• Mass: total mass per meter (including cement coating and socket), determined with the nominal thickness, in kg/m

• Reference: commercial reference Saint-Gobain PAM

• Pre-insulated pipes for frost protection

• External ^BioZinalium^® coating consists of two layers:
  • a layer of zinc-aluminium 85/15 alloy, enriched with copper, with a minimum surface density of 400g/m², applied by spraying molten metal onto the surface of the iron, using an electric arc spray gun, from ZnAl (Cu) alloy wire
  • a protective layer of Aquacoat (semi-permeable), a water-based blue acrylic of average thickness 80 microns applied using a spray gun
• Internal lining: sulphate resisting blast furnace cement mortar
• Pipes equipped with thermal insulation (polyethylene sleeve, polyurethane foam, foam spacer, elastomer sleeve) to protect networks exposed to risks of freezing. Thermal conductivity coefficient of the coating: 0.034 W/m.°K. External temperature that the coating can withstand continuously: -40 °C. For lower temperatures, please contact us.
• Pressure class in conformity with Standard EN 545-2010 and ISO 2531-2009
• Standard joint in alimentary elastomer EPDM (ACS, KTW, WRAS,…)
• Vi anchoring without bolts

The thermal insulation coating delays the temperature drop of the water crossing the pipeline section exposed to the cold. It does not prevent it. The table below indicates the minimum time required for the water inside a completely full main, laid above ground, to reach 0 °C (no ice crystals) under the following conditions:

• zero flow rate (Q=0)
• initial water temperature = 4 °C, 10 °C
• external temperature = -5 °C, -10 °C, -20 °C
• wind speed 5 m/s to 20 m/s
• surface transmission coefficient between the external surface of the polyethylene sleeve and the ambient air = 23 W/m2.°K

To prevent the water from freezing, the flow rate Q must be chosen so that the time ΔT for the water to cross the preinsulated section is less than the freezing time ΔT at zero speed, indicated in the following table.

where: Q=flow rate (in m3/h), S=cross-section (in m2), L=length of the exposed section (in m), ΔT freezing=freezing time in hours