gabo Systemtechnik Laying instructions. 6 speed•pipe® bundle SRV 50 / 8 x 10 Laying event at temperatures of 10 °C below zero. The high-quality material PE-HD of the speed•pipe® and the jacket pipe allows the laying event at temperatures of 10 °C below zero. Optimum at temperatures between 5 and 20 °C. However, the optimum conditions are obtained at temperatures between 5 to 20 °C. At temperatures below the freezing point, store in heated areas. At temperatures below the freezing point we recommend to store the coils with the SRV before laying in heated areas for 12 to 24 hours. When preparing fitting lengths please pay attention to the temperature-induced change in length of the ducts. If the temperature of the duct wall increases or decreases by 1 Kelvin (1 K = 1 °C) the PE-HD duct shall extend or shorten by 0.2 mm per meter length. Thus, the duct shortens by 1 mm in case of a temperature difference of Δ -5 Kelvin. Laying and notes. 2. Laying temperatures. In the construction of all kind new fibre optic routes, to avoid tension in the duct system particularly in midsummer the duct string must be placed in the trench some time before it is filled, to reach an adaption between duct and soil.
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