|
Coal
Tar Creosote Oil
For
Preservative of Timber confirming to IS 218 of 1968 &
BS 144 of 1990
Typical
Specifications:
| |
Type
I |
Type
II |
Type
III |
| Specific
Gravity at 30°C |
1.003
- 1.108 |
1.003
- 1.108 |
0.910
- 1.120 |
| Distillation
Limits % |
|
|
|
| Upto
205 °C |
<6
|
<5
|
<35
|
| Upto
230 °C |
<40
|
5
- 30 |
<55 |
| Upto
270 °C |
- |
- |
- |
| Upto
315 °C |
<78 |
40 - 78 |
40 - 85 |
| Upto
355 °C |
60
|
73-
90 |
>65 |
| Tar
Acid |
5-
20 |
5 - 20 |
1
- 20 |
| Toluene
Insoluble |
<0.4
|
<0.4 |
<0.4 |
| Moisture
% |
<1.5 |
<1.5 |
<1.5
|
| Liquidity
after heating up to 38 °C and keeping at 32 °C
for 2 hours |
Completely
Liquid |
Completely
Liquid |
- |
| Recommended
for |
General
purpose, marine, timber, Railway sleepers and where
decay hazard is high but some exudation of creosote
in service is tolerable. |
Telegraph
and electricity transmission poles, fencing and structural
timbers. |
|
Application
:
Pressure impregnation / hot & cold open tank impregnation.
The timber should be immersed in Creosote, which should
be heated to 85 ? 90 °C and maintain at that temperature
for 1 hour or longer. A service life of 50 years and upward
for red wood pole has been recorded when properly treated.
Brushing, spraying and cold steeping treatment will provide
less permanent protection and should be retreated at an
interval of 3 to 5 years.
To reduce bleeding in service, it is recommended:
1. To use Type II having closely defined distillation range
and restricted residue content.
2. Appropriate pre conditioning of the timber, and
3. The use of empty cell process incorporating a high final
vacuum for adequate period.
Pre treatment
Timber should be free from inner and outer bark / surface
water, mud or dust and shall be seasoned to moisture of
below 30%.
Please read the MSDS of Creosote Oil for safety, health
& other information before using
|
