Services
These service areas are designed to work together as one structured inspection workflow, not as isolated tasks.
NAS delivers engineering-led NII and integrity support from screening and planning through physical on-site inspection execution, analysis, and close-out.
Core service areas
Each group below connects to the others: front-end engineering, field delivery, data control, and integrity decisions form one program.
Non-Intrusive Inspection
Structured inspection of pressure vessels without internal entry: engineering assessment, targeted methods, on-site execution, and formal evaluation.
Spans screening and strategy through workpacks, field delivery, analysis, and interval or close-out decisions.
- Asset screening and NII qualification
- Equipment profiling and degradation assessment
- Inspection strategy selection (Type A / B / C approaches)
- Vessel zoning and coverage definition
- Workpack development and inspection planning
- Physical on-site inspection execution and advanced NDT application
- Inspection conformance review and quality assurance
- Data analysis and integrity evaluation
- Inspection interval setting and engineering close-out
Aligned with structured NII methodologies and recognised industry practice.
Asset Integrity Engineering
Engineering to assess condition, manage risk, and optimise inspection and maintenance programs.
Feeds the degradation knowledge and decision rules that NII planning and evaluation depend on.
- Risk-Based Inspection (RBI) development and updates
- Corrosion Risk Assessment (CRA)
- Fitness-for-Service (API 579 Level 1–3)
- Inspection planning and optimisation
- Degradation modelling and assessment
- Shutdown and turnaround integrity coverage
- Defect assessment and remediation planning
Inspection Execution & NDT
On-site inspection delivery: method selection, advanced techniques, and quality-controlled data capture aligned to the agreed strategy.
The field phase of the same workflow: execution against the workpack, with adaptation when site reality differs from the plan.
- Advanced NDT method selection and application
- On-site inspection execution on live assets
- Inspection quality assurance and verification
- Inspection troubleshooting and adaptation in the field
- Inspection data capture, organisation, and control
- Site-based engineering and inspection leadership
Methods are chosen and run for integration with the engineering strategy, not promoted in isolation.
Data & Digital (NIIPRO)
Structured workflow and data management for NII programs: traceability from planning through field records to evaluation.
Supports the work before, during, and after on-site execution so decisions stay linked to evidence.
- Structured inspection workflows
- Data traceability and auditability
- Inspection data visualisation
- Corrosion and thickness data analysis
- Integration with integrity management systems
NII overview · NII process (step-by-step) · Asset screening · Capability statement
Common questions
- Are these services separate offerings?
- They are grouped for clarity, but they are designed to connect as one structured inspection workflow from screening through execution to close-out.
- Does NAS execute inspections in the field?
- Yes. NII and NDT service areas include physical on-site inspection execution, not only desk-side planning or coordination.
- What is NIIPRO’s role?
- NIIPRO is a structured workflow and data system for NII programs: planning, field records, traceability, and evaluation. It is not a generic dashboard.
- Where should I start?
- Use the qualification screening for a preliminary view, or read the NII process page for the full step-by-step methodology, then talk to NAS about scope.
What makes NAS different
- Structured workflows, not ad-hoc inspection
- Engineering-led decisions, not isolated data
- Planning through on-site execution and close-out in one program
- Repeatable, auditable inspection logic
- Integrity outcomes, not data for its own sake
Need inspection and engineering across your workflow?
Single assets or fleet-wide programs: same structured workflow from planning through on-site execution to evaluation.