Fuels & solid fuels
Diesel fuel
Specification, combustion, low-temperature, contamination and handling-safety parameters for diesel fuels.| Test / parameter | Published method | Technical purpose | Interpretation context | Capability |
|---|---|---|---|---|
| Inorganic Acidity | IS 1448 (P2) | Measures acidic constituents under the selected method. | An increase from the reference may support oxidation or acidic-contamination review; a single result must be compared with product and service history. | Inhouse |
| Total Acidity | IS 1448 (P2) | Measures acidic constituents under the selected method. | An increase from the reference may support oxidation or acidic-contamination review; a single result must be compared with product and service history. | Inhouse |
| Ash Content | ASTM D482 / IS 1448 (P4) | Measures non-combustible residue remaining after controlled combustion. | A higher result indicates more inorganic residue and may affect fuel quality, deposits or specification compliance. | Inhouse |
| Ramsbottom Carbon Residue | ASTM D524 / IS 1448 (P8) | Assesses the tendency to leave carbonaceous residue under the selected procedure. | A higher result indicates greater residue-forming tendency; relevance depends on the fuel grade and application. | Inhouse |
| Cetane Index | ASTM D4737 | Measures or evaluates cetane index under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Inhouse |
| Pour Point | ASTM D97 / IS 1448 (P10) | Assesses low-temperature flow or operability characteristics. | A higher temperature generally indicates poorer low-temperature behaviour; compare with the climatic and product requirement. | Inhouse |
| Copper Strip Corrosion | ASTM D130 / IS 1448 (P15) | Measures or evaluates copper strip corrosion under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Inhouse |
| Distillation Recovery with IBP / FBP | ASTM D86 / IS 1448 (P18) | Characterises volatility and recovery across the boiling range. | Higher or lower recovery temperatures may indicate composition change, contamination or a different product grade when compared with the applicable specification. | Inhouse |
| Flash Point - Abel | IS 1448 (P20) | Determines the temperature at which vapour ignites under the selected procedure. | A lower result may indicate volatile contamination or product change; a higher result is interpreted against the identified grade and method. | Inhouse |
| Kinematic Viscosity at 40 °C | ASTM D445 / ASTM D7042 / IS 1448 (P25) | Characterises resistance to flow and, where applicable, viscosity response to temperature. | Higher viscosity may accompany oxidation, soot or heavier-product contamination; lower viscosity may accompany dilution, shear or lighter-product mixing. | Inhouse |
| Sediment by Extraction | ASTM D473 / IS 1448 (P30) | Assesses particulate, sediment or insoluble contamination in the sample. | A higher result indicates more suspended or insoluble material; acceptability depends on the equipment, product specification and sampling point. | Inhouse |
| Density / Specific Gravity | ASTM D1298 / ASTM D4052 | Measures mass per unit volume and supports product identification or specification review. | A result above or below the applicable range may indicate product mixing, contamination, composition change or an incorrect grade. | Inhouse |
| Total Sulphur | ASTM D4294 / ASTM D5453 | Quantifies sulphur in the submitted fuel or material. | A higher result may affect specification compliance, emissions-related requirements or process suitability; compare with the identified grade. | Inhouse |
| Water Content | ASTM D6304 / ISO 12937 | Quantifies water or moisture in the submitted material. | A higher result may indicate ingress, condensation, storage or handling contamination; significance depends on the product and applicable limit. | Inhouse |
| Cold Filter Plugging Point | ASTM D6371 / IS 1448 (P110) | Assesses low-temperature flow or operability characteristics. | A higher temperature generally indicates poorer low-temperature behaviour; compare with the climatic and product requirement. | Inhouse |
| Lubricity - Wear Scar Diameter | ASTM D6079 | Measures or evaluates lubricity - wear scar diameter under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Outsourced |
| Gross Calorific Value | ASTM D240 / IS 1448 (P6) | Measures the heat released during controlled combustion. | A higher value indicates greater energy content per reported basis; a lower value may reflect moisture, ash or material-composition differences. | Inhouse |
| Chlorine Content | ASTM D4929 | Measures or evaluates chlorine content under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Inhouse |
| Cleanliness | ISO 4406 | Assesses particulate, sediment or insoluble contamination in the sample. | A higher result indicates more suspended or insoluble material; acceptability depends on the equipment, product specification and sampling point. | Inhouse |
| Oxidation Stability | ASTM D2274 | Assesses oxidation stability or condition-related spectral indicators. | Greater oxidation-related change may indicate degradation; stability results and spectral trends must be interpreted using the applicable method and reference. | Inhouse |
| Total Contamination | EN 12662 | Assesses particulate, sediment or insoluble contamination in the sample. | A higher result indicates more suspended or insoluble material; acceptability depends on the equipment, product specification and sampling point. | Inhouse |
| Cloud Point | ASTM D2500 | Assesses low-temperature flow or operability characteristics. | A higher temperature generally indicates poorer low-temperature behaviour; compare with the climatic and product requirement. | Inhouse |