|
Calcium Silicate |
Mineral Wool / Rock Wool |
|
B.I.S. specification |
I.S. 9428 |
I.S. 9842 |
|
Composition |
It has no binders & is self setting |
It contains organic binders – for strength and dimensional
stability |
|
Service Temperature (Limiting temp.) |
1050 °C |
700 °C
|
|
Thermal Conductivity |
Mean temperature
W/mK
at 300°C
0.078
400°C 0.092
500°C
0.112
|
Mean temperature
W/mK
at 300 °C 0.083
400 °C
0.110
----
|
|
Compressive strength |
2%reduction
in thickness
at 60 p.s.i. load.
High strength allows it to withstand more physical abuse.
One can walk on insulated surface &/or weatherproof jacket
without affecting its seal at the joints.
|
5 % reduction
in thickness
at 0.38 p.s.i. load.
It gets compressed easily and hence weatherproof jacket
loses stability & seal at the joints are broken even under
small loads.
This permits moisture to enter into insulation materials
and as little as 5 % moisture will reduce insulating
effect by 50 %.
The results are reduced operating efficiency, increased
boiler/ thermal loads, accelerated corrosion rates, etc. |
|
Shot content |
No shot. |
Contains about 20 % shots which increase weight but no
insulating or structural value. |
|
Fire Resistant
a)
Combustibility
b)
Self Heating
c)
Smouldering After Glow |
Non-combustible
” ”
” ”
|
Binders burn/oxidize
Can self heat
Can smoulder |
|
Effect of heat |
Contains no binders and hence no exothermic reaction.
It exhibits minor surface cracking when heated to 1922
°F |
It suffers binder burn out, smokes & has exothermic
reaction causing greater temperature rise in insulation
than the base pipe temperature. |
|
Chloride content |
Below 10 p.p.m.
|
Above 100 p.p.m., increases corrosion & causes stress
cracking of Austenic steel pipes. |
|
Re-use |
It can be removed easily and re-installed. |
Upon removal it loses dimensional stability and falls
apart. Hence may not be usable. |
|
Health hazard |
No effect |
Causes itching |
|
Cost performance |
Investment cost is high
Maintenance cost is low
Heat energy saving is more due to better thermal
performance
STRONGER,TOUGHER, DURABLE & Long LASTING
|
Investment cost is low
Maintenance cost is high
Heat energy loss is more which increases due to inferior
thermal performance as time passes. |
We can help you cut your energy cost by calculating heat losses
and surface temperature data using NAIMA, U.S.A.’s 3E plus
program. Please send us details of your thermal equipments &
pipelines with basic data to enable us to calculate economic
thickness of insulation & suggest how CSI can effectively help
conserve expensive thermal (heat) energy.
Economic Thickness of Insulation (ETI)
Economic thickness is defined as that insulation thickness
which yields the lowest annual cost of ownership and operation.
The data used to calculate the ETI includes: (1) cost of fuel &
heat (2) interest rate (3) income tax rate (4) life of
insulation (5) ambient temperature (6) wind speed (7) labour
rate (8) jacket emissivity, etc.
General
We have experienced and qualified personnel and a new
well-equipped laboratory.
H. V. Shah, who has developed this product during his research
work for M. Tech. Program, is a manufacturing member of
committee C.16 on thermal insulation: A.S.T.M., Philadelphia,
U.S.A. We are also represented on Thermal Insulation Committee
of Bureau of Indian Standards (BIS), Delhi, INDIA.
We are glad to inform you that Department of Scientific and
Industrial Research Ministry of Science & Technology, Government
of India, New Delhi have accorded Recognition of In-house R & D
Unit of our factory (copy of certificate attached).
