Per-Batch Diesel Test Certificates for Fuel Distributors, Transporters, and Industrial Buyers

Diesel test certificate is a test report from an accredited laboratory that proves the quality of one batch or one delivery of diesel. Industrial fuel distributors, agents, and transporters use it to reassure customers, while industrial buyers use it to make sure the diesel they pay for meets specification.

This page explains what a diesel test certificate contains, the parameters usually listed, how to sample per batch, and how certificates from an independent laboratory help resolve quality disputes.

Why a Diesel Test Certificate from an Independent Lab Matters

Industrial, mining, and project customers increasingly ask for proof of quality for every delivery, especially since B40 biodiesel blends made water and sediment problems more frequent. A certificate issued by an independent KAN-accredited laboratory is more readily accepted by customers than a seller's own quality statement. For distributors, the certificate also protects against blame when the problem actually comes from the customer's tank.

Party	Benefit of a diesel test certificate
Fuel distributors and agents	Proof of quality to win and keep industrial customers
Transporters	Proof of quality at loading, protecting against claims of mixing en route
Industrial buyers	Basis for accepting or rejecting deliveries and filing claims
Mining and projects	Quality control of large diesel volumes from many suppliers

Parameters in a Diesel Test Certificate

Parameter	Method
Density at 15 °C	ASTM D4052 / D1298
Kinematic viscosity at 40 °C	ASTM D445
Moisture content	ASTM D6304
Water and sediment	ASTM D2709
Sulfur	ASTM D4294 / D5453
Cetane number / index	ASTM D613 / D4737
Flash point	ASTM D93
Distillation	ASTM D86
FAME content	EN 14078 / ASTM D7371
Copper strip corrosion	ASTM D130

Parameters can be adjusted to the specification requested by the customer or contract. Each parameter is explained in the guide diesel fuel lab testing and the full list in fuel analysis.

Per-Batch Certificates: The Workflow

Step	What to do
1. Sampling	Sample from the storage tank or truck compartment after filling, plus a sealed backup bottle
2. Identification	Label with the batch number, tank or vehicle number, date, and recipient name
3. Shipping	Send to the laboratory with a sample kit, or schedule a technician for routine volumes
4. Testing	Parameters tested by the agreed ASTM or EN methods
5. Certificate	An accredited report with results, methods, specification limits, and conforming or non-conforming status

For distributors with routine deliveries, a periodic programme with a fixed schedule allows certificates to be issued consistently for every batch.

Resolving Quality Disputes

Diesel quality disputes usually arise because there is no agreed reference sample. Good practice: at handover, take samples together, seal several bottles, have both parties sign, each keep one bottle, and send one bottle to an independent laboratory. Results from an accredited laboratory become a basis for settlement acceptable to both sides.

Service Areas

We accept samples from all of Indonesia, including East Java, Central Java, Bali, Lombok and NTB, Kalimantan, and Sulawesi. Samples are sent with our kit, or taken by technicians for programmes with many points.

Frequently Asked Questions about Diesel Test Certificates