Cochin laboratory

Classification & Significance of Test Methods of Petroleum Products
DR. MURUKAN B.& MSPD RAJ

COCHIN LABORATORY

IRUMPANAM

Test method of Petroleum & its finished products are broadly classified as follows

1. 
   APPEARANCE (Visual, Colour, Particulate Contamination)
   
2. 
   COMPOSITION (Acidity, Aromatics, Olefins, Sulfur)
   
3. 
   VOLATILITY ( Density, Distillation, Vapour Pressure, Flash Point /Fire Point)
   
4. 
   COMBUSTION (Antiknock Quality (Ron / Mon), Ignition Quality (Cetane No), Burning Quality (Calorific Value))
   
5. 
   FLUIDITY ( Viscosity, Viscosity Index, Penetration)
   
6. 
   STABILITY (Induction Period, Gum Content)
   
7. 
   CHANGE OF STATE (Freezing Point ,Pour Point, Cloud Point, Drop Point For Grease, Softening Point)
   
8. 
   CORROSIVITY (Total Sulphur, Doctor Test, Acidity / Alkalinity, Copper / Silver Corrosion)
   
9. 
   OTHERS (Ash / Sediments/ Carbon Residue, Asphaltenes, water Tolerance Metal Content,
   

Benzene/Aromatics, Olefins/PAH)

Significance of test methods