Service

Third-Party Verification & Independent Design Review

Independent verification of offshore structural, naval architecture and pipeline engineering: design reviews, re-analysis with our own models, structural integrity assessments and owner’s-engineer review of contractor deliverables. Our team has reviewed five jackets and topsides for an operator and assessed 39 ONGC jacket structures, and supports jack-up site assessments in ONGC, ADNOC and Aramco fields.

What you receive

Design-basis and code-compliance review with a numbered comment register
Independent re-analysis: in-place, fatigue, seismic, pushover and transportation models built from the contractor’s drawings
Structural integrity and life-extension assessment (API RP 2A Section 17 / ISO 19902 Annex A)
Jack-up site-specific assessment review (SNAME T&R 5-5A / ISO 19905-1)
Stability, mooring and conversion engineering review for vessels
Close-out report stating what was verified, how, and what remains open

What independent verification means here

A third-party review is only useful when it is genuinely independent and genuinely technical. We do not audit paperwork; we rebuild the critical analyses in our own software from the contractor’s drawings and compare results, then trace every comment to a code clause or a design-basis requirement. The comment register, the re-analysis models and the close-out report are the deliverables the operator, the class society or the certifying authority sees.

Structural integrity and brownfield assessments

For assets past their design life the review becomes an assessment: survey data interpretation, corrosion and damage modelling, in-place and pushover analyses for reserve strength, and a requalification statement against API RP 2A Section 17 or ISO 19902. Our team surveyed and assessed 39 jacket structures for ONGC and reviewed five jackets and topsides in a single structural review scope.

Where TPV sits relative to class and MWS

Class approval verifies compliance with class rules for the vessel or unit. A marine warranty surveyor approves marine operations for the underwriter. Third-party verification is broader and owner-driven: it checks that the engineering meets the project design basis and the applicable codes, whether or not a class or MWS review also applies. We position ourselves as the verifier, never as the MWS on the same operation we engineered.

Codes & standards

API RP 2AISO 19902ISO 19905-1 / SNAME 5-5ADNV-RP-C203DNV-ST-F101NORSOK N-004AISC 360

Software

SACSDNV SesamSTAAD.ProANSYSAbaqusOrcaFlexMOSES

Assets

Jackets & topsidesJack-upsFPSO / FSRUOSVs & bargesSubsea pipelines & risers

← Vessel conversion

FSRU & cryogenic piping →

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Projects that prove it

Structural review — 5 jackets & topsidesIndependent review of structural deliverables for five offshore jackets and their topsides — design reports, calculations and drawings checked against applicable codes.Jacket face survey — 39 platformsStructural assessment of 39 jacket faces for riser and clamp installation — ONGC-approved hand sketches, drawings, and survey reports.Owner's advisory — vessel selection & PLB conversionStrategic advisory for purchase and conversion of a vessel to Pipe Lay Barge — vessel purchased at a reasonable negotiated price.Riser lifting feasibility — 30+ lifts assessedFeasibility assessment of riser installation across multiple candidate vessels — structural analysis and lift methodology for 30+ lifts assessed.

Related services

Lifting & Heavy-Lift EngineeringLift engineering for offshore and yard lifts: rigging design, lift-point and padeye checks, dynamic amplification, crane-vessel and barge stability during the lift, and the lift plan calculations reviewed by class or a marine warranty surveyor. Our team has engineered 100+ heavy lifts, including riser and conductor installation campaigns on ONGC platforms.Sea Fastening & Load-out EngineeringSea-fastening and load-out engineering for cargo, modules and cranes carried on barges and heavy-transport vessels: motion and acceleration criteria, grillage and tie-down design, ballast and load-out sequences, and the calculation package prepared for marine warranty surveyor approval. Delivered from Mumbai to EPC, T&I and fabrication contractors in India, the Gulf, West Africa and Southeast Asia.Class Approval Drawings & Statutory DocumentationClass approval drawings, calculations and statutory documents for newbuilds, conversions and modifications, prepared to the rules of ABS, DNV, LR, BV, IRS, NK, KR, BKI, RINA and CCS and taken through plan approval on the owner’s or yard’s behalf. Founder experience as an IRS surveyor means the package is written the way the reviewer reads it.OSV & Vessel Conversion EngineeringConversion engineering for offshore support and work vessels: OSV to well-stimulation vessel, barge to pipe-lay barge, tanker to FSO/FPSO and LNG carrier to FSRU. We deliver the feasibility study, the structural, stability and systems engineering and the class approval package, as on a 200-tonne-steel OSV-to-WSV conversion completed in Norway in 2024.

Regions we serve for this

Offshore, Marine & Pipeline Engineering in IndiaKannamwar Engineering is headquartered in Mumbai and delivers offshore structural, naval architecture and pipeline engineering to operators, EPC contractors and yards across India: ONGC’s western offshore fields, HPCL’s marine terminals, west-coast LNG infrastructure and the east-coast basins. 39 ONGC jacket structures assessed, riser and conductor installation campaigns engineered, and 120+ days of offshore site supervision at Mumbai High.Offshore Engineering Support for the Gulf: UAE, Saudi Arabia, Qatar, Oman, KuwaitEngineering support for EPC, T&I and fabrication contractors and jack-up operators working in the Arabian Gulf: jacket and topside engineering, sea-fastening and load-out packages, lifting engineering, jack-up site-specific assessment support and third-party design review, delivered from Mumbai in the same working day. Saudi Aramco and Lamprell are among our clients.Naval Architecture & Vessel Conversion Engineering for Norway and the North SeaRemote engineering support for vessel owners, conversion yards and offshore contractors in Norway, the UK and the wider North Sea: OSV and PSV conversions, deck strengthening and class approval under DNV, stability and mooring analysis, and third-party design review. In 2024 our team engineered an OSV-to-well-stimulation-vessel conversion in Norway that added 200 tonnes of steel under DNV class.Offshore & Marine Engineering Support for Nigeria and West AfricaEngineering support for vessel owners, installation contractors and terminal developers in Nigeria, Ghana, Angola and the wider Gulf of Guinea: vessel upgrades and deck-equipment installation, pipe-lay and installation engineering, class approval packages and design review. Our team has delivered a pipe-lay vessel piggyback pipeline upgrade and a four-davit installation on vessels operating in Nigeria.

Sectors

Offshore Oil & Gas Subsea Pipelines, Cables & SURF

Disciplines

Offshore Structural Engineering Pipeline, Riser & Subsea Naval Architecture

Frequently asked questions

What is the difference between third-party verification and class approval?

Class approval checks compliance with the classification society’s rules. Third-party verification is owner-driven and checks the engineering against the project design basis and all applicable codes, often by independent re-analysis, whether or not class also reviews it.

Do you rebuild the analysis models or review the contractor’s?

For critical items we rebuild the models in our own software from the drawings and compare results; for the rest we review the contractor’s models and reports and trace every comment to a code clause.

Can you verify a jack-up site-specific assessment?

Yes. We review SSAs against ISO 19905-1 and SNAME T&R 5-5A, including leg penetration, preload and storm-survival cases, and have supported jack-up assessments in ONGC, ADNOC and Aramco shallow-water fields.