Technical Integrity Verification (TIV) Services

A Safety Critical Element (SCE) must perform its intended safety function whenever it is required. Technical Integrity Verification (TIV) provides a structured and independent approach to verify that these elements are capable of delivering their specified performance. iFluids Engineering and Consultancy W.L.L provides TIV as an independent third-party assurance service for operators, EPC contractors, and asset owners across the oil & gas, LNG, petrochemical, and process industries. Our verification covers critical systems such as fire and gas detection, emergency power, passive fire protection, temporary refuge, ventilation, fire water systems, and other Safety Critical Elements.

Our TIV process verifies the complete integrity trail from design and procurement through construction, installation, testing, and commissioning. Each SCE is assessed against defined performance standards, technical requirements, datasheets, setpoints, cause-and-effect logic, inspection records, test results, and other supporting evidence to confirm that the required safety function can be achieved. Whether supporting a Pre-Startup Safety Review (PSSR), Safety Case close-out, project commissioning, or major hazard facility readiness, iFluids Engineering and Consultancy W.L.L helps provide documented, traceable, and defensible evidence of technical integrity before the facility is placed into operation.

What Is Technical Integrity Verification (TIV)?

Technical Integrity Verification (TIV) is an independent, evidence-based assessment that confirms a facility’s Safety Critical Elements meet their defined Performance Standards for functionality, availability/reliability, and survivability at every stage of a project, from design through commissioning.

Inspection confirms correct installation. TIV goes further, confirming that the system actually delivers the safety function assigned to it in the safety case. A fire and gas detector can be installed perfectly and still fail its purpose if its alarm setpoint doesn’t match the Technical Safety Basis of Design, a gap invisible on a general arrangement drawing, but exactly what Technical Integrity Verification (TIV) is built to catch.

Why It Matters

Skipping or shortcutting SCE verification carries three costs that compound quietly:

1. Regulatory exposure. A Safety Case without a credible, independent TIV trail is a weak submission regulators increasingly expect performance-standard-based verification as a precondition for startup, not an appendix.
2. Cost of late discovery. A misaligned setpoint found at design review costs an email. The same gap found at commissioning costs a shutdown and a schedule slip.
3. Insurability. Insurers pricing major hazard facilities increasingly ask for documented SCE performance verification as underwriting evidence.

Our Technical Integrity Verification (TIV) Methodology

We verify against your project’s own Performance Standards, Technical Safety Basis of Design, and applicable codes every requirement traced to a source document, every document closed out with a recorded finding. The methodology runs on two structures: what we verify, and when.

Three verification dimensions, per SCE

A Safety Critical Element can satisfy one of these and quietly fail another, which is why each is assessed separately.

• Functionality — does the system do what it’s meant to do: detector coverage, alarm setpoints, voting logic, and signal paths through to shutdown and control systems. This is where the most consequential gaps hide, often invisible on a general arrangement drawing.
• Availability/Reliability — will it still be there and working when called on: IP ratings, backup power and battery autonomy, online diagnostics, and voting architecture that balances spurious trips against missed detections.
• Survivability — will it keep functioning during the event it protects against: fire-rated cabling, equipment sited in classified safe areas, gas-tight refuge integrity, and accessible life-saving appliances. The most often under-engineered dimension, since it requires thinking past first response.

Four project phases, per dimension 

Each dimension is re-checked at every phase, since a requirement compliant on paper at design stage can still drift by the time it reaches site.

• Design — benchmark the safety basis of design, cause-and-effect diagrams, and hazardous area classification against each Performance Standard. Most findings surface here, where correction is cheapest.
• Procurement — review vendor datasheets, bid evaluations, and FAT/QA-QC requirements against what the design basis promised.
• Construction — verify installation against approved drawings and manufacturer instructions.
• Commissioning — confirm energization, loop checks, and functional testing demonstrate real performance.

Every line item carries the same four-part record: requirement → finding → conclusion and recommendation → reference document. 

A report that says “compliant” with no document reference is an opinion; one that cites the specific datasheet or diagram is evidence a regulator, insurer, or PSSR panel can independently check.

Safety Critical Elements We Verify

Our scope typically spans nine SCE categories, each assessed against its own Performance Standard:

• Fire & gas detection systems — point and open-path gas detectors, flame/heat/smoke detectors, and their integration into the fire and gas / emergency shutdown logic
• Temporary refuge (TR) and muster areas — capacity, accessibility, communication provisions, and gas-tight integrity during a major accident event
• Emergency power — diesel generators, UPS systems, battery autonomy, and load priority for safety-critical circuits
• Certified electrical equipment — equipment certification, hazardous area zoning, and temperature classification
• HVAC and non-hazardous area ventilation — pressurization, fire/gas damper closure, and smoke control during an emergency
• Fire water ring main — hydraulic capacity, redundancy, and demand calculations
• Passive fire protection — fire-rated walls, penetration seals, and structural fireproofing
• Gaseous/clean agent suppression — flow and battery calculations, discharge coverage, for enclosed critical spaces such as server and switchgear rooms
• Sprinkler and water spray systems — coverage, activation logic, and hydraulic design compliance

Scope scales to whatever additional SCEs your project’s own risk profile defines the methodology is built to extend, not to be forced onto a facility it wasn’t designed for.

Standards We Verify Against

Every finding is benchmarked against your project’s own design basis documents plus the applicable codes for its scope, typically including:

Our Process

1. Scope — we align with you on the applicable SCEs and the Performance Standards and project documents that govern each one.
2. Build the checklist — structured, per-SCE checklists covering all three verification dimensions across all four project phases.
3. Verify — drawings, specifications, datasheets, calculations, and cause-and-effect diagrams reviewed line by line against each requirement.
4. Document the finding — every requirement closed out with a finding, a compliance conclusion, and a specific, actionable recommendation where a gap exists not a vague flag someone else has to re-investigate.
5. Report — findings consolidated into a formal, traceable Technical Integrity Verification (TIV) Report structured by SCE, ready to support your Pre-Startup Safety Review or Safety Case submission.
6. Re-verify — as the project moves from design into procurement, construction, and commissioning, we return to close out items previously marked “verification pending,” so the record stays current instead of frozen at one phase.

Real Project — North Field Production Sustainability (NFPS) Project, QatarEnergy LNG

On the NFPS Onshore Buildings & Infrastructure Compression Project for QatarEnergy LNG, iFluids Engineering and Consultancy W.L.L was engaged as the independent third-party consultant to develop and execute the Technical Integrity Verification programme for the project’s Safety Critical Elements. The work was delivered as two linked documents.

TIV Checklist

The TIV Checklist was the preliminary activity. It set out every requirement to be verified for each Safety Critical Element, organized by verification dimension functionality, availability/reliability, and survivability  and by project phase, based on the design and procurement documentation available at the time. This checklist became the reference point for everything that followed, giving the site visit a defined, structured scope rather than an open-ended walk-down.

TIV Report

The TIV Report followed the checklist and the site visit. We carried out a structured site visit against the finalized checklist, examining the installed systems and equipment directly rather than relying on drawings alone, and incorporated those findings into the formal report alongside the earlier document-based review. The result was one consolidated, evidence-referenced record spanning desk verification and physical inspection with every finding traceable back to a specific requirement and reference document.

What You Receive & Who Needs This

You get a traceable Technical Integrity Verification (TIV) Checklist, Report, and compliance status register ready for PSSR or Safety Case submission built for EPC contractors, asset owners, HSE/project managers, and brownfield operators who need independent, document-referenced proof that their Safety Critical Elements will perform.

Conclusion

Technical Integrity Verification (TIV) rewards discipline over shortcuts that’s what our process safety and loss prevention team is built for. We work independently of your design and EPC teams, so findings carry the credibility regulators and insurers actually look for: a third-party conclusion, not a self-certification. Our team brings hands-on experience verifying fire and gas systems, emergency power, fire protection, and hazardous area electrical integrity across oil & gas, LNG, and petrochemical projects.

For Technical Integrity Verification support on your project, reach out to iFluids Engineering and Consultancy W.L.L

Frequently Asked Questions