Refrigerant Pipe Insulation Thickness Calculation

You can see that knowing the vrf vrv manufactures requirement for the temperature rating of the insulation can have an effect on the thickness of the insulation required for the same size of pipe in the system.
Refrigerant pipe insulation thickness calculation. Pipes in cooling systems should always be insulated. Overall this is good news giving mechanical insulation an opportunity to contribute to. Hot cold water freeze protection. The thickness of pipe insulation for most common residential cold water pipes is 1 2 thick.
New pipe insulation thicknesses. The insulation thickness of chilled water refrigerant and brine systems should not be less than indicated below. Pipe insulation thicknesses are greater than or equal to those in the 2007 standard but duct insulation thicknesses have not changed. Hence insulation thickness ri rp 0 2302 0 1524 0 0777 insulation thickness 77 7 mm extra margin must be taken on insulation thickness as sometimes conducting heat transfer through insulation may become higher than convective heat transfer due to air on outside wall of insulation.
There is usually no additional benefit of adding more than 1 2 thick fiberglass or rubber pipe insulation to cold water piping. 1 inch 25 4 mm insulation of a cold systems should be made with micro cellular cross linked polyethylene foam with low water vapor diffusion. One vrf manufacture may require 1 1 2 and another 2 1 2 of insulation for the high pressure vapor piping. Thermal conductivity of the insulation material for the temperature range of the pipe can be taken as 0 04 w m k.