Thermal conductivity in Insulation materials

http://en.wikipedia.org/wiki/Thermal_insulation

"Please explain in detail."

1. Consult the manufacturer's of each type of insulation for their products' insulation properties for comparison.

2. Buy a good college level text book on Heat Transfer/Transmission and study it thoroughly for the details which are too extensive to cover in the alloted space available here.

"In which way this thermal conductivity will effect in the Heat conservation insulation."

In a nutshell: The lower the conductivity and/or the more insulation the better the heat retention in the hydro-carbon service equipment, pumps, pipes, etc.

The service temp of the outside shell is the determining factor of the type of insulation material to use.

In general the use of different insulation material in temperature depending order are

- Expanded perlite approx 300 degr C

- Glass wool approx 450 degr. C

- Rockwool approx 600 degr C

- Ceramic fibers 900 degr.C ( will become malignant and will be treated like asbestos)

- Refractory approx 1200 up to 2000 degr.C (used inside furnaces and burners)

Rock stone fibers in most cases are better heat resistant than glass fiber wool, but the most
imported factor is the binder they use to "glue" (bind) the fibers together ).

The binder will be disbanded by temperatures above 400 degr C and the insulation fibers will be separated so you will find hot spots on the outside sheeting.

Depended on temperature, the better way is to use unbinded Rock fibers, stitched to a first layer SS and second layer galvanized mesh.