pipe insulation thickness

[bangoman]

I live and work in high humidity area abbt 85 percent as such all ref lines are insulated wat size insul;ation thickness will suit this area and hw do u arrive to that value

[2007eng]

More than 10 mm, 20 is good from Daikin manuals

[nike123]

Go there and you could calculate online or download software for calculation:
http://tinyurl.com/43per7

[US Iceman]

The insulation thickness is determined by the pipe operating temperature and the ambient conditions. The goal of this is to prevent condensation of water on the insulation surface (outside surface of insulation).

As the humidity increases the insulation thickness also increases for any given pipe temperature. The logic is to keep the outside surface of the insulation above the dew point temperature of the air. If the pipe is well insulated (sufficient thickness) the outside surface temperature will be above the dew point temperature therefore no condensation can occur.

The other important aspect of this is to ensure the insulation is sealed well. Water getting into the insulation or under it contributes to corrosion (in ferrous material like carbon steel). And, if the pipe temperature is below freezing the water can freeze so that the ice damages the insulation system.

Some of the insulation manufacturers have tables with various operating conditions you can use to determine the minimum required thickness.