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Diesel fuel inspection is a critical process aimed at maintaining product quality throughout the logistics chain. This procedure minimizes trade risks related to discrepancies in fuel composition, quantity, and accompanying documentation required for import and export operations.

CISS GROUP provides diesel fuel inspection services for major oil corporations and international trading companies at storage facilities, refineries, and ports worldwide.

Diesel fuel is classified as a hazardous and highly flammable substance, requiring stringent quality control and adherence to safety regulations. Its quality directly affects engine performance, fuel efficiency, and the longevity of industrial and transport equipment. Non-compliant fuel leads to increased consumption, reduced performance, and severe damage to expensive machinery.

Fuel adulteration and contamination remain significant risks. At different stages of the supply chain, diesel fuel undergoes various treatments, often resulting in quality deviations. Mixing diesel fuel with kerosene reduces lubricity, accelerating wear on fuel injection systems. This type of adulteration is detectable only through laboratory analysis. Fraudulent practices also include mislabeling low-viscosity marine fuel, heating oil, or gas condensate as automotive diesel fuel. Contamination from water, metal oxides, and industrial resins occurs due to improper storage, transportation violations, or deliberate malpractice.

CISS GROUP deploys accredited inspectors and laboratory specialists to conduct comprehensive diesel fuel inspections, ensuring compliance and protecting supply chains.

The main stages of diesel fuel inspection:

Incoming and outgoing diesel fuel inspection

Inspection at this stage is conducted during the transfer of diesel fuel to or from storage tanks, vessels, barges, tank trucks, railway tank cars, elevators, or port terminals. The CISS GROUP inspector performs a thorough assessment of storage conditions and transport containers, ensuring cleanliness, dryness, and suitability for fuel storage. Visual inspections confirm that the fuel is transparent, free from impurities, and without foreign odors.

Cleanliness inspection of containers and vessel holds before loading

Before loading, inspectors examine containers and vessel holds for cleanliness and suitability for diesel fuel transportation. Inspections include assessments of internal surfaces, ensuring the absence of residues from previous cargo. Checks extend to the integrity of locks, hinges, rubber seals on container doors, and hatch covers on vessels to prevent contamination or leakage.

Supervision of the loading process and sampling of diesel fuel

CISS GROUP inspectors supervise loading operations to ensure compliance with regulations and contractual agreements. This includes monitoring fuel transfer, verifying gross and net weight during re-weighing, and conducting draft surveys to determine the exact quantity of loaded fuel.

Inspectors oversee fumigation processes when necessary and perform visual quality assessments. Samples are taken according to international sampling protocols to ensure accurate representation of the entire batch. Composite samples are prepared for further laboratory analysis. Upon completion of loading, inspectors seal containers or vessel holds to prevent unauthorized access.

All data gathered during inspections is recorded in real-time reports, accessible to clients through CISS GROUP’s secure digital platform. The company provides 24/7 monitoring and inspection services to ensure continuous supervision.

Laboratory analysis of diesel fuel quality

CISS GROUP conducts laboratory testing of diesel fuel exclusively in accredited laboratories, ensuring compliance with internationally recognized standards and contract specifications. Testing identifies key physical and chemical properties, confirming adherence to industry regulations.

Standard parameters analyzed include:

• Density and fractional composition
• Water content and mechanical impurities
• Sulfur content and filterability coefficient
• Cloud point and flash point temperatures
• Water-soluble acids and alkalis
• Copper strip corrosion test

These tests ensure that diesel fuel meets operational and safety requirements before use or distribution.

Photo and video documentation

Every stage of the inspection process is documented with high-resolution photographs and videos. This media serves as verifiable proof of compliance with quality standards, with precise timestamps included. Upon completion of the inspection, CISS GROUP provides clients with a detailed visual report covering all control procedures.

Issuance of certificates and digital verification

Following inspection, CISS GROUP issues final inspection certificates and reports, secured with a digital cryptographic signature. Clients verify authenticity through a unique QR code, which provides access to the official CISS GROUP database containing PDF versions of the certificates.

Digitally signed certificates meet banking requirements for trade financing and letters of credit, ensuring transaction integrity. The use of encrypted and tamper-proof documentation enhances security and trust in trade operations.

CISS GROUP provides industry-leading diesel fuel inspection services, ensuring transparency and compliance in global fuel supply chains. Advanced testing methods, expert inspectors, and a global network of accredited laboratories enable reliable quality control solutions tailored to the needs of oil companies, traders, and logistics providers.

• Global presence with inspections at refineries, terminals, ports, and storage facilities
• Certified experts with extensive industry experience
• Compliance with ISO and ASTM international fuel quality standards
• 24/7 inspection and monitoring services
• Secure digital reporting with QR code verification for real-time data access

Reliable fuel quality control is essential for seamless trade operations. CISS GROUP ensures compliance, safety, and transparency through professional diesel fuel inspection services.

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