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| Light Diesel Oil |
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Table 1 Requirements for LDO (Clause 4.2)
| Sl
No. |
Characteristics |
Requirements |
Method Of Test, Ref To |
| |
|
HSD |
LDO |
Annex |
[P
: ] of IS 1448 |
| (1)
|
(2) |
(3)
|
(4)
|
(5)
|
(6)
|
| i) |
Acidity, inorganic |
|
|
|
P : 2 |
| ii) |
Acidity, total mg of KOH/G, Max |
0.30 |
|
|
P : 2 |
| iii) |
Ash, percent by mass, Max |
0.01 |
0.02 |
|
P : 4 |
| iv) |
Carbon residue (Ramsbottom) on 10
percent residue, percent by mass, Max |
0.351 |
1.5 (on whole sample) |
|
P : 8 |
| v) |
Cetane number2,
Min |
45 |
|
|
P : 9 |
| vi) |
Pour point3,
Max |
6oC for
winter and 18oC for summer4 |
12oC for
winter and 21oC for summer4 |
|
P : 10 |
| vii) |
Copper strip corrosion for 3 h at
100oC |
Not worse than No.
1 |
Not worse than No.
2 |
|
P : 15 |
| viii) |
Distillation 90 percent volume recovery
at oC, Max |
366 |
|
|
P : 18 |
| ix) |
Flash point5 |
| |
Abel, o C, Min |
32 |
|
|
P : 20 |
| |
Pensky-Martens, oC,
Min |
|
66 |
|
P : 21 |
| x) |
Kinematic viscosity, cSt, at 40o
C |
1.8 to 5.0 |
2.5 to 15.7 |
|
P : 25 |
| xi) |
Sediments, percent by mass, Max |
0.05 |
0.10 |
|
P : 30 |
| xii) |
Density at 15oC, kg/m2 |
820-880 |
To be reported |
|
P : 32 |
| xiii) |
Total sulphur6,
percent by mass, Max |
1.0 |
1.8 |
|
P : 33 |
| xiv) |
Water content, percent by volume,
Max |
0.05 |
0.25 |
|
P : 40 |
| xv) |
Cold Filter Plugging Point (CFPP)
2, Max |
9oC for
winter and 21oC for summer4) |
|
|
P : 110 |
| xvi) |
Total sediments, mg per 100 ml7,
Max |
1.6 |
|
A |
|
1. This limit is applicable
prior to addition of cetane number improvers, if used. In case a value
exceeding the limit is obtained on finished fuels in the market, ASTM
D 4046 shall be used to establish the presence of nitrate containing
cetane number improves. In such case the present limit for carbon
residue cannot be applied. However, the use of cetane number improves
does not exempt the manufacturer on meeting this requirement prior
to the addition of additives.
2.
When a test engine is not available or when the quantity of the sample
is too small for an engine rating ‘Calculated Cetane Index by Four
Variable Equation’ by ASTM D 4737 may be used for estimation of cetane
number. The error in prediction of the ‘Calculated Cetane Index’ by
this method will be less than +,-2 Cetane Number for fuels having
Cetane Number within the range of 32 to 56. It may be noted that this
method is not applicable to pure hydrocarbons or fuels containing
cetane improvers or fuels derived from coal. For arbitration purposes,
the direct determination of cetane number by means of the standardized
engine test shall be used unless the buyer and the seller agree otherwise.
3. Subject to agreement between
the purchaser and the supplier, a lower or higher maximum pour point
and CFPP may be required for special applications and geographical
areas.
4. Winter shall be the
period from November to February (both months inclusive) and rest
of the months of the year shall be called as summer.
5.
Diesel fuel for naval applications including Merchant navy and fishing
vessels of 12 metres and above in length shall have a flash point
of 66oC Min, when tested by the method prescribed in IS
1448 [P : 21] : 1970
6. Total
sulphur content for HSD shall stand automatically revised as per the
following schedule; although efforts will be made by the oil companies
to reduce sulphur content below 1.0 percent by mass even before 1998:
| |
1998 |
2000 |
| Total sulphur content, percent
by mass |
max 0.50 |
0.25 |
7. This test shall be carried out
only at the refinery or manufacturer’s end and the limit for this
test is meant for products prior to addition of multi-functional additives
if used. However, the use of multi-functional additives does not exempt
the manufacturer from meeting this requirement prior to the addition
of additives.
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| Updated on November 01, 2009 |
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