Boiler Insulation Materials

[Biggy]

Hi folks,

Heres one for you...
We have just stripped the insulation off one of our Boilers, most of it is fairly poor condition so it now needs replacing.

If I ask our insluation contractor he will just put Rockwool on and clad it. Is this the best material around, or is there something that will give a significant difference in insulation effectiveness...and hence reduce operating costs?

Our boilers run at 210psi ~197degC.

Regards,

Biggy

 

[quark]

Rockwool is fair enough for 197⁰C and you may have to go for 150mm thickness. This can be cheaper for you.

 

[yogibear1]

I have seen calcium silicate insulation block double layered (mudded joints) over boiler tubes and high temperature steam leads. The block does not have the organic binders that rock wool or other blankets have, hence they do not break down over time. The organic binders are volatile and cook off during the first reheating of the unit