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Inspection Services

Stewart Inter Sea are long standing experts in the provision of routine and bespoke inspection services across the entire West Africa Region, with high end experience, enabling us to offer tailored services, which maintain independence and reliability whilst adapting precisely to meet the requirements of our clients.
With our diverse spectrum of services incorporating all aspects of downstream quantity and quality inspections for Crude Oil and refined products, we are confident in our ability to help find a solution for all your inspection needs.

Please see below for some of our routine services, and please feel free to contact us for a discussion on how we can assist with your end-to-end Testing, Inspection, and Certification needs.
Our ISO 9001 accredited teams in both the UK and Lagos have experience from all aspects of Oil and Gas TIC, enabling us to offer high end support from all our locations, plus providing more technical inspection services including Loss control/ expedition, cargo superintendency, Technical Compliance Auditing and more.
Our UK operations team are well versed in Ship-to-Ship operations and all the intricacies associated with them. We are on-hand 24 hours a day, 365 days a year via email, landline and mobile phone.

Inspection Services
Lab Services

Our core laboratory is located in Lome, Togo, conveniently position to serve offshore Ship-to-Ship operations, as well as local shore-side terminals. We also have a newly furnished laboratory based in Apapa region of Lagos, Nigeria, which is responsible for product import certification on all products entering the country via terminal imports, as well as ad-hoc nominations, including some of the less common analysis in West Africa, such as Salt Content and predictive Research Octane Number, alongside a range of essential key-points.

Equipped with the latest necessary instrumentation and analytical techniques, leading the local market in a transition to automated testing, such as Flash Point and Distillation our laboratory in Lome is capable of performing analysis on a wide range of petrochemical properties, from Density and Flash Point to more complex analysis including UV Sulphur analysis, Determination of Hydrocarbon Type by FIA, and Elemental Quantification by ICP; having recently constructed a custom-designed clean room to house our brand new Spectro-Genesis ICP-OES.
Currently we are the only Laboratory in Lome able to offer Mid IR Spectroscopy FAME analysis to EN 14078 or ASTM D7371, Total Sulphur analysis by ASTM D5453, Lead Content by EDXRF (ASTM D5059), and ASTM D6304 for Determination of Water Content by Karl Fischer.

2023 will also see the construction of a brand-new facility, custom designed to meet the specific requirements of precision petrochemical analysis, which is being developed concurrently whilst working towards attaining ISO 17025 accreditation, led by our UK based Quality Management Team.

Both of our laboratories are operational 24 hrs per day, 365 days of the year, offering a comprehensive spectrum of analysis for Gas Oil, Fuel Oil, Gasoline, Jet Fuel and Crude Oil.

Stewart Inter Sea also has experience in setting up and manning offshore mini-laboratories, co-ordinating local proficiency schemes, handling dangerous goods dispatches, and auditing.

For a current list of available analysis or further information on any of our services,

please see our latest capability here.

Lab Services
Loss Control

Our team of experts are able to identify, advise and resolve cargo, marine or technical issues, eradicating or minimising financial losses due to actual or potential physical losses, cargo quality or demurrage claims.


With 100% expeditor attendance onboard the vessel or terminal throughout the entire load, discharge or STS operation, we are there to evaluate and identify areas of risk / potential losses, either physical or apparent. 

Attending Expeditor will have a full commercial awareness of our principal's requirements. Evaluate and implement with the vessel an effective C.O.W procedure to eradicate or minimise any ROB. We remain onsite, negotiating / mitigating any adverse cargo values.


We also provide expert witnessing of analytical analysis within terminal or 3rd party laboratories.

Loss Control
Government Export Supervision Schemes

We work closely with Governments to safeguard their interests and fully protect them with regard to verification of quantity, ensuring

  • Bill of Ladings truly reflect the quantity shipped by the exporter.

  • Verifying the quality, where quality may have a reflection on pricing.

  • Fiscal Auditing, this service enabling at a glance, the true position on fiscal losses due to incorrect practices with metering or other issues.


Meter auditing is also a service which ensures that meters at export or collecting facilities (Crude Oil), are properly calibrated and records maintained to manufacturers standards.This is a service becoming more and more standard on the African Continent, as mechanical failings easily resort to losses. Our superintendents easily identify shortfalls in maintenance and record keeping in this field of operation.

Government Export Supervision Schemes may include the following procedures:

  • Fiscal auditing (Undertaken by qualified Chartered Accountants)

  • Product quantity and quality control

  • Pipeline monitoring

  • Point of export monitoring and controlling

  • Custodial document generation and auditing

  • Custodial transfer monitoring

Government Export Supervision Scheme
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