Insulation "130R" and "25RP"means?

[takiyasamsama]

I have a data sheet stating the insulation as 130R. What does this means? is it 130 times R-value or the R-value is 130? The insulation material probably be rockwool. How about "P"? I'm not very familiar with this terminology

Can anyone clears this up for me? Thanks

 

[EdStainless]

please don't post the same question in multiple forums.

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P.E. Metallurgy, Plymouth Tube

 

[EmmanuelTop]

For insulation, R-value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. See:

http://web.ornl.gov/sci/roofs+walls/insulation/ins_02.html

http://www.greatdayimprovements.com/insulation-r-value-chart.aspx

Dejan IVANOVIC
Process Engineer, MSChE