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TURBINE OIL STANDARD PARAMETERS |
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OIL: Servo prime 46T |
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Testing frequency: Every 6 months |
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Sl No. |
Oil Property |
UOM |
Test Method |
Acceptable
limits |
|
1 |
Appearance |
NA |
Visual |
Clear/yellow Viscous liquid |
|
2 |
Colour |
Hazen |
ASTM D1500 |
<
2 |
|
3 |
Density |
Kg/m3 |
IS 1448-P-16:1990 |
820-870 |
|
4 |
Flash Point |
0C |
ATM D 93 |
>
180 |
|
5 |
Kinematic Viscosity at 40 0C |
Cst |
ATM D 445-17a |
43-48 |
|
6 |
Kinematic Viscosity at 100 0C |
Cst |
ATM D 445-17a |
>6.7 |
|
7 |
Viscosity index |
NA |
ASTM D 2270 |
>
98 |
|
8 |
RPVOT (Revolving Presure Vessel
Oxidation Stabilty Test) |
Minutes |
ASTM D 2272 |
>25%
(minimum) |
|
9 |
Total acid number (TAN) |
mg/KOH/g |
ASTM D 974 |
<0.2 |
|
10 |
Elemental analysis (Metal like
Fe,Cu,Cr,Al, Ni, Sn, Si etc wear analysis) |
ppm |
ASTM D 5185 |
<
20 |
|
11 |
Sediments |
% |
IS 1866:2000 |
<0.01 |
|
12 |
Moisture content |
ppm |
ASTM D 6304 |
<1000 |
30-Things you mus know on steam Turbines |
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TRANSFORMER OIL STANDARD PARAMETERS |
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OIL: Transformer oil |
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Testing frequqency: 1 year |
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Sl No. |
Oil Property |
UOM |
Test Method |
Acceptable limits |
|
1 |
Appearance |
NA |
Visual |
Clear free from sediments &
suspended matter |
|
2 |
Density |
Kg/m3 |
IS:1448(P:16)1990 (RA 2014) |
890
max |
|
3 |
Flash Point |
0C |
IS 1448(P:21)-2012/ATM D 93 |
>125 |
|
4 |
Pour point |
0C |
IS-1448 (P-10) |
-6 |
|
5 |
Kinematic Viscosity at 27 0C |
Cst |
IS:1448(P:25)-1976 (RA 2007) |
<27 |
|
6 |
Total acid number (TAN) |
mg/KOH/g |
S: 1448(P:2)-2007/ASTM D 974 |
<0.03 |
|
7 |
Sediments |
% |
IS 1866:2000 |
Should
not be detective or <0.01 |
|
8 |
Moisture content |
mg/kg |
IS: 13567-1992 (RA 2008)
/IEC-814/ASTM D 6304 |
<50 |
|
9 |
Breakdown voltage (Dielectric
strength) |
kv |
IS: 6792-1992 (RA 2008) |
40
kV |
|
10 |
Tan Delta
(Di–Electric Dissipation Factor) in absolute, at a Temp:900C |
Degree |
IS: 6262-1971 (RA 2011) |
<1 |
|
11 |
Resistivity (Specific Resistance) at
90 deg C |
Ω-cm |
IS: 6103-1971 (RA 2011) |
|
|
12 |
Dissolved gas analysis |
|
IS:
10593:2006 |
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a |
Methane (CH4) |
ml/l |
100-150 (oil life 4 to 10 years) |
|
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b |
Ethylene (C2H4) |
ml/l |
15-200 (oil life 4 to 10 years) |
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c |
Ethane (C2H6) |
ml/l |
100-150(oil life 4 to 10 years) |
|
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d |
Acetylene(C2H2) |
ml/l |
30-50(oil life 4 to 10 years) |
|
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e |
Carbon
Monoxide(Co) |
ml/l |
400-500(oil life 4 to 10 years) |
|
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f |
Carbon
Dioxide (Co2) |
ml/l |
4000-5000(oil life 4 to 10 years) |
|
|
g |
Hydrogen (H2) |
ml/l |
200-300(oil life 4 to 10 years) |
|
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13 |
Interfacial Tension (IFT) |
N/m |
IS: 6104-1971 Ring Method (RA
2011)/ASTM D 971 |
>
0.015 |
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