Steam Pipe Insulation Thickness Calculation

This module considers schedule 40 pipework as covered in bs 1600.

Steam pipe insulation thickness calculation.

The table below indicates recommended insulation thickness. Ln ri 0 1524 2π 0 035 200 50 80 0 4123. Minimum insulation thickness for chilled and cold water copper pipes to control condensation on a high emissivity outer surface 0 9 with an ambient temperature of 25 c and a relative humidity of 80. This calculation determines the ideal thickness of water piping insulation for efficiently and economically preventing a heat transfer from outside to inside and keeping the water transported within cool.

Input data includes the operating temperature the ambient conditions temperature relative humidity and wind speed and. Very hot systems like hot water and steam systems should also be insulated to avoid potential personal injuries. Outside diameter of steel pipe on which insulation has been based mm 10 5 0. Hence insulation thickness ri rp 0 2302 0 1524 0 0777.

Dew point c l. Equations displayed for easy reference. Hence conductive heat transfer rate should be limited to lower values than estimates used in this sample problem. It does not determine the thickness of insulation designed to keep condensate or other fluids from losing heat.

In general there are no insulation thickness requirements for residential domestic hot water pipes but we find that 1 thickness will greatly reduce the loss of heat transmission. A 100 mm schedule 80 pipe has an outside diameter of 114 30 mm a wall thickness of 8 56 mm giving a bore of 97 18 mm. This calculator estimates the thickness of insulation required to avoid condensation on the outer surface of an insulated horizontal steel pipe. Use of 1 1 2 or 2 thick fiberglass pipe insulation will most likely not be cost effective on domestic hot water unless the size of the pipe is greater than 3 ips not common in homes.

Outer diameter of pipe m note. Online calculator to quickly determine economical insulation thickness of steam piping. Condensation control calculator horizontal pipe. Based on insulation with thermal resistivity in the range 4 4 6 ft2 hr of btu in typical for mineral wool at room temperature 1 inch 25 4 mm.

Insulation thickness m d1. 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.