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INSULATION OF PIPES
The cost of insulation of low temperature pipes, as a rule, is of the same order of magnitude as the pipe itself. In addition, since the diameter of the pipes with insulation can be two or three times that of the pipe, the designer should provide sufficient space for final Assembly.
Vapour barrier is required for operation at low temperatures pipes. Unlike water vapor way through the insulation of refrigeration building, which is isolated from the warm outdoors and in the end retrieved through the coil in the refrigeration space, no choice, for water vapour, which enters the pipe insulation. For this reason, water vapor retardation should be maximum effective at prolonging the life of isolation. Some specifications15 for isolation at low temperature pipes include.
- Coating insulation vapor jackets with the Perm rating 0.02 or less.
- Reliance should not be in contact with the piping.
- The thickness of insulation should be sufficient to maintain the insulation surface temperature above the dew point. Isocyanurate or Styrofoam recommended.
- Because lining, insulation, and all pipes have different coefficients of thermal expansion, dual layer Annex proposed for extremely low temperature thermal insulation with staggered shared construction.
- Package expansion joints with flexible insulation material.
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